Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
Area code 240 prefixes
785 of the 786 possible NXX blocks are assigned in area code 240 (99.9% of capacity), spread across 63 rate centers and 43 holders. The largest holders are OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (118 blocks, 15.0%), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (85 blocks, 10.8%), NEW CINGULAR WIRELESS PCS, LLC - DC (69 blocks, 8.8%). Grouped by brand, Verizon accounts for 182 blocks; brand-attributable holders cover 89% of the code, and the rest are CLECs, VoIP wholesalers and regional carriers that trade under their own names. The assignment records here run from 2001-01-09 to 2023-07-25, with 54 blocks handed out in 2001 alone. 727 blocks (93%) are in thousands-block pooling, meaning the block is shared between carriers in 1,000-number lots rather than held whole – which is why a single NXX can serve several carriers at once. 252 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
785 assigned blocks of 786
63 rate centers
43 holders of record
93% in thousands-block pooling
Largest holders in 240
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | T-Mobile | 118 | 15% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | Verizon | 85 | 10.8% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 69 | 8.8% |
| PAETEC ITEL, LLC | Windstream | 63 | 8% |
| LEVEL 3 COMMUNICATIONS, LLC - MD | Lumen | 59 | 7.5% |
| ONVOY, LLC - MD | Onvoy | 56 | 7.1% |
| VERIZON MARYLAND, INC. | Verizon | 48 | 6.1% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 46 | 5.9% |
| PEERLESS NETWORK OF MARYLAND, LLC | Peerless | 42 | 5.4% |
| BANDWIDTH.COM CLEC, LLC - MD | Bandwidth | 35 | 4.5% |
| CORE COMMUNICATIONS, INC.- MD | – | 32 | 4.1% |
| METROPCS, INC. | T-Mobile | 21 | 2.7% |
Names are printed as they appear in the assignment records, which is the legal entity rather than the brand. Holding a block is not the same as serving the numbers in it: portability moves numbers between carriers and pooling splits a block between several.
Rate centers with their own page
Rate centers where at least three blocks are assigned, excluding the numbered metro zone codes. The remainder are in the full table below.
FREDERICK 43GAITHERSBG 40HAGERSTOWN 33WALDORF 26LEONARDTN 17CUMBERLAND 16LXTNPKGRML 12MYERSVILLE 11HUGHESVL 9LA PLATA 8BRANDYWINE 8MECHANCSVL 7RIDGE 6INDIANHEAD 6OAKLAND 6POOLESVL 6TOMPKINSVL 6NANJEMOY 5BUCKEYSTN 5MOUNT AIRY 5HIGHFIELD 4FROSTBURG 4HANCOCK 4MIDDLETOWN 4GRANTSVL 3THURMONT 3CLEAR SPG 3EMMITSBURG 3MCCOOLE 3WILLIAMSPT 3KEEDYSVL 3SMITHSBURG 3WALKERSVL 3NEW MARKET 3
All 785 assigned blocks
One row per NXX. “Pooled” means carriers draw 1,000-number lots from the block rather than holding all 10,000, so a pooled prefix can belong to several carriers at once. “Not in service” means assigned but not yet open for calls – a caller ID from one of those is necessarily spoofed. The holder column gives the brand where the legal entity maps to one; the full legal names are in the holders table above, exactly as NANPA records them.
| Prefix | Holder of record | Rate center | Assigned | Pooled | In service |
|---|---|---|---|---|---|
| 240-200 | Bandwidth | WSHNGTNZN2 | 2010-10-04 | yes | yes |
| 240-201 | Peerless | RIDGE | – | yes | yes |
| 240-202 | Onvoy | HIGHFIELD | 2020-05-28 | yes | yes |
| 240-203 | T-Mobile | HAGERSTOWN | 2011-10-04 | yes | yes |
| 240-204 | Verizon | WSHNGTNZN2 | 2011-09-07 | yes | yes |
| 240-205 | AT&T | WSNGTNZN10 | 2003-07-23 | yes | yes |
| 240-206 | Verizon | WSNG236Z14 | – | yes | yes |
| 240-207 | Windstream | DAMASCS236 | – | yes | yes |
| 240-208 | Peerless | LA PLATA | – | yes | yes |
| 240-209 | Peerless | INDIANHEAD | – | yes | yes |
| 240-210 | AT&T | WALDORF | – | yes | yes |
| 240-212 | CORE COMMUNICATIONS, INC.- MD | OAKLAND | – | – | yes |
| 240-213 | Peerless | WALDORF | – | yes | yes |
| 240-214 | Peerless | MECHANCSVL | – | yes | yes |
| 240-215 | Lumen | FREDERICK | – | yes | yes |
| 240-216 | T-Mobile | WALDORF | 2001-03-15 | yes | yes |
| 240-217 | T-Mobile | HAGERSTOWN | 2001-04-16 | yes | yes |
| 240-218 | Peerless | NANJEMOY | – | yes | yes |
| 240-219 | Peerless | RIDGE | 2014-09-22 | yes | yes |
| 240-220 | Peerless | POOLESVL | – | yes | yes |
| 240-221 | Verizon | WSNGTNZN11 | – | yes | yes |
| 240-222 | Windstream | WALDORF | – | yes | yes |
| 240-223 | Verizon | WSHNGTNZN2 | – | yes | yes |
| 240-224 | Verizon | GAITHERSBG | 2012-09-10 | yes | yes |
| 240-225 | CORE COMMUNICATIONS, INC.- MD | FREDERICK | – | – | yes |
| 240-226 | Onvoy | OAKLAND | 2020-07-16 | yes | yes |
| 240-227 | AT&T | MYERSVILLE | 2023-07-25 | yes | yes |
| 240-228 | Verizon | WSNG236Z13 | – | yes | yes |
| 240-229 | Lumen | WALDORF | – | yes | yes |
| 240-230 | Lumen | HUGHESVL | – | yes | yes |
| 240-231 | CORE COMMUNICATIONS, INC.- MD | HAGERSTOWN | – | – | yes |
| 240-232 | Lumen | WSNG236Z14 | – | yes | yes |
| 240-233 | AT&T | TOMPKINSVL | – | yes | yes |
| 240-234 | Verizon | WSHNGTNZN2 | 2011-10-04 | yes | yes |
| 240-235 | Windstream | WSHNGTNZN2 | – | – | yes |
| 240-236 | Verizon | FREDERICK | – | yes | yes |
| 240-237 | AT&T | LXTNPKGRML | – | yes | yes |
| 240-238 | Windstream | WSNGTNZN10 | – | – | yes |
| 240-239 | CORE COMMUNICATIONS, INC.- MD | LEONARDTN | – | – | yes |
| 240-240 | FRACTEL, LLC | DAMASCS240 | 2020-07-02 | yes | yes |
| 240-241 | STARPOWER COMMUNICATIONS, LLC - MD | WSNG236Z13 | – | yes | yes |
| 240-242 | STARPOWER COMMUNICATIONS, LLC - MD | WSNGTNZN11 | – | yes | yes |
| 240-243 | Verizon | GAITHERSBG | – | yes | yes |
| 240-244 | STARPOWER COMMUNICATIONS, LLC - MD | WSNGTNZN16 | – | yes | yes |
| 240-245 | STARPOWER COMMUNICATIONS, LLC - MD | WSNG236Z14 | – | yes | yes |
| 240-246 | STARPOWER COMMUNICATIONS, LLC - MD | GAITHERSBG | – | yes | yes |
| 240-247 | Verizon | WSHNGTNZN3 | – | yes | yes |
| 240-248 | Peerless | RIDGE | – | yes | yes |
| 240-249 | AT&T | MECHANCSVL | – | yes | yes |
| 240-250 | Peerless | BRANDYWINE | – | yes | yes |
| 240-251 | CORE COMMUNICATIONS, INC.- MD | HIGHFIELD | – | – | yes |
| 240-252 | Lumen | GAITHERSBG | – | yes | yes |
| 240-253 | Bandwidth | WSHNGTNZN6 | – | yes | yes |
| 240-254 | AT&T | HUGHESVL | – | yes | yes |
| 240-255 | Peerless | POOLESVL | – | yes | yes |
| 240-256 | AT&T | LEONARDTN | – | yes | yes |
| 240-257 | AT&T | NANJEMOY | – | yes | yes |
| 240-258 | AT&T | RIDGE | – | yes | yes |
| 240-259 | Charter | HUGHESVL | 2021-04-22 | yes | yes |
| 240-260 | Verizon | WSNG236Z14 | – | yes | yes |
| 240-261 | Onvoy | GAITHERSBG | 2015-12-23 | yes | yes |
| 240-262 | Comcast | LXTNPKGRML | – | yes | yes |
| 240-263 | AT&T | WSHNGTNZN2 | – | yes | yes |
| 240-264 | Verizon | LAUREL236 | – | yes | yes |
| 240-265 | T-Mobile | WSHNGTNZN2 | 2011-11-10 | yes | yes |
| 240-266 | Peerless | WSNG236Z14 | – | yes | yes |
| 240-267 | Verizon | HAGERSTOWN | 2017-05-18 | yes | yes |
| 240-268 | Verizon | WSNGTNZN10 | – | yes | yes |
| 240-269 | Peerless | WSNGTNZN16 | – | yes | yes |
| 240-270 | Verizon | WALDORF | 2011-11-07 | yes | yes |
| 240-271 | AT&T | WSHNGTNZN2 | – | – | yes |
| 240-272 | T-Mobile | WSHNGTNZN2 | 2011-11-10 | yes | yes |
| 240-273 | Lumen | WSHNGTNZN6 | – | yes | yes |
| 240-274 | AT&T | WSHNGTNZN2 | – | – | yes |
| 240-275 | CORE COMMUNICATIONS, INC.- MD | GRANTSVL | – | – | yes |
| 240-276 | Verizon | WSNGTNZN10 | 2004-05-04 | yes | yes |
| 240-277 | T-Mobile | WSHNGTNZN2 | 2002-10-18 | yes | yes |
| 240-278 | Verizon | LAUREL236 | 2011-07-08 | yes | yes |
| 240-279 | CORE COMMUNICATIONS, INC.- MD | WALDORF | – | – | yes |
| 240-280 | Comcast | LAUREL236 | – | yes | yes |
| 240-281 | AT&T | WSHNGTNZN2 | – | yes | yes |
| 240-282 | Peerless | MECHANCSVL | – | yes | yes |
| 240-283 | Windstream | WSNGTNZN11 | – | yes | yes |
| 240-284 | Lumen | FROSTBURG | 2004-11-01 | yes | yes |
| 240-285 | Verizon | FREDERICK | – | yes | yes |
| 240-286 | T-Mobile | WSHNGTNZN2 | 2002-09-17 | yes | yes |
| 240-287 | CORE COMMUNICATIONS, INC.- MD | HANCOCK | – | – | yes |
| 240-288 | Comcast | THURMONT | 2004-11-01 | yes | yes |
| 240-289 | Windstream | WSHNGTNZN6 | – | yes | yes |
| 240-290 | Verizon | WSNGTNZN11 | – | yes | yes |
| 240-291 | AT&T | HAGERSTOWN | 2002-10-15 | yes | yes |
| 240-292 | Verizon | WSNGTNZN11 | – | yes | yes |
| 240-293 | STARPOWER COMMUNICATIONS, LLC - MD | WSNGTNZN12 | – | yes | yes |
| 240-294 | Verizon | LAUREL236 | – | yes | yes |
| 240-295 | Windstream | LAUREL236 | – | yes | yes |
| 240-296 | Windstream | WSHNGTNZN4 | – | yes | yes |
| 240-297 | Lumen | WSNG236Z13 | – | yes | yes |
| 240-298 | Verizon | LEONARDTN | – | – | yes |
| 240-299 | T-Mobile | WALDORF | – | yes | yes |
| 240-300 | Verizon | WALDORF | 2010-12-07 | yes | yes |
| 240-301 | Onvoy | CLEAR SPG | 2020-06-09 | yes | yes |
| 240-302 | AT&T | LAUREL236 | 2016-09-28 | yes | yes |
| 240-303 | Windstream | WSNGTNZN16 | – | yes | yes |
| 240-304 | T-Mobile | WSHNGTNZN5 | 2002-07-03 | yes | yes |
| 240-305 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-306 | Verizon | GAITHERSBG | – | yes | yes |
| 240-307 | Bandwidth | EMMITSBURG | 2003-03-27 | yes | yes |
| 240-308 | AT&T | DAMASCS236 | – | yes | yes |
| 240-309 | Verizon | LEONARDTN | 2012-09-10 | yes | yes |
| 240-310 | UScellular | HAGERSTOWN | – | yes | yes |
| 240-312 | Windstream | WSHNGTNZN5 | – | yes | yes |
| 240-313 | Verizon | HAGERSTOWN | – | yes | yes |
| 240-314 | Verizon | WSNGTNZN10 | – | yes | yes |
| 240-315 | Verizon | FREDERICK | – | yes | yes |
| 240-316 | T-Mobile | WSHNGTNZN2 | – | yes | yes |
| 240-317 | STARPOWER COMMUNICATIONS, LLC - MD | LXTNPKGRML | – | yes | yes |
| 240-318 | Verizon | WSNGTNZN16 | – | yes | yes |
| 240-319 | Verizon | LAUREL238 | 2008-06-06 | yes | yes |
| 240-320 | Windstream | WALDORF | – | yes | yes |
| 240-321 | UScellular | OAKLAND | – | yes | yes |
| 240-322 | CORE COMMUNICATIONS, INC.- MD | MCCOOLE | – | – | yes |
| 240-323 | CORE COMMUNICATIONS, INC.- MD | EMMITSBURG | – | – | yes |
| 240-324 | YMAX COMMUNICATIONS CORP. - MD | ASHTON238 | 2008-10-08 | yes | yes |
| 240-325 | CORE COMMUNICATIONS, INC.- MD | DAMASCS236 | – | – | yes |
| 240-326 | Windstream | WSNG236Z15 | – | yes | yes |
| 240-327 | CORE COMMUNICATIONS, INC.- MD | GAITHERSBG | – | – | yes |
| 240-328 | Verizon | WSNGTNZN10 | – | yes | yes |
| 240-329 | Lumen | HAGERSTOWN | – | yes | yes |
| 240-330 | T-Mobile | WSHNGTNZN2 | 2007-12-14 | yes | yes |
| 240-331 | Peerless | WSHNGTNZN3 | – | yes | yes |
| 240-332 | Peerless | TOMPKINSVL | – | yes | yes |
| 240-333 | Windstream | WSHNGTNZN2 | 2001-05-09 | – | yes |
| 240-334 | Lumen | WSNG236Z14 | – | yes | yes |
| 240-335 | Windstream | WSNG236Z14 | – | yes | yes |
| 240-336 | CORE COMMUNICATIONS, INC.- MD | WSHNGTNZN2 | – | – | yes |
| 240-337 | Onvoy | WSHNGTNZN5 | – | yes | yes |
| 240-338 | Verizon | WSHNGTNZN3 | – | yes | yes |
| 240-339 | Windstream | WSNG236Z15 | – | yes | yes |
| 240-340 | T-Mobile | WSHNGTNZN2 | 2011-08-18 | yes | yes |
| 240-341 | Verizon | BUCKEYSTN | 2009-02-25 | yes | yes |
| 240-342 | STARPOWER COMMUNICATIONS, LLC - MD | ASHTON236 | – | yes | yes |
| 240-343 | Verizon | HANCOCK | 2011-05-10 | yes | yes |
| 240-344 | AT&T | FREDERICK | 2002-10-15 | yes | yes |
| 240-345 | Lumen | ASHTON238 | 2006-03-09 | yes | yes |
| 240-346 | T-Mobile | WALDORF | – | yes | yes |
| 240-347 | Bandwidth | HAGERSTOWN | 2008-08-04 | yes | yes |
| 240-348 | Lumen | WSNGTNZN16 | – | yes | yes |
| 240-349 | Onvoy | LA PLATA | – | yes | yes |
| 240-350 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-351 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-352 | Peerless | LA PLATA | – | yes | yes |
| 240-353 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-354 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-355 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-356 | Lumen | MYERSVILLE | – | yes | yes |
| 240-357 | Verizon | FREDERICK | 2006-06-12 | yes | yes |
| 240-358 | Peerless | DAMASCS236 | – | yes | yes |
| 240-359 | Peerless | INDIANHEAD | – | yes | yes |
| 240-360 | T-Mobile | LAUREL236 | 2013-09-17 | yes | yes |
| 240-361 | Windstream | GAITHERSBG | – | yes | yes |
| 240-362 | Verizon | CUMBERLAND | – | yes | yes |
| 240-363 | Onvoy | WSNGTNZN11 | – | – | yes |
| 240-364 | Windstream | GAITHERSBG | 2001-05-09 | yes | yes |
| 240-365 | BALTIMORE-WASHINGTON TELEPHONE (BWT) | DAMASCS236 | – | – | yes |
| 240-366 | Bandwidth | WILLIAMSPT | – | yes | yes |
| 240-367 | T-Mobile | FREDERICK | 2002-10-18 | yes | yes |
| 240-368 | Peerless | WALDORF | – | yes | yes |
| 240-369 | CORE COMMUNICATIONS, INC.- MD | MOUNT AIRY | – | – | yes |
| 240-370 | T-Mobile | WSHNGTNZN2 | 2007-12-14 | yes | yes |
| 240-371 | Peerless | WSNGTNZN12 | – | yes | yes |
| 240-372 | T-Mobile | GAITHERSBG | – | yes | yes |
| 240-373 | Verizon | WSNG236Z13 | – | – | yes |
| 240-374 | Lumen | LAUREL236 | – | yes | yes |
| 240-375 | T-Mobile | WSHNGTNZN5 | – | yes | yes |
| 240-376 | Peerless | HUGHESVL | – | yes | yes |
| 240-377 | Lumen | INDIANHEAD | – | yes | yes |
| 240-378 | CORE COMMUNICATIONS, INC.- MD | CUMBERLAND | – | – | yes |
| 240-379 | Verizon | FREDERICK | – | – | yes |
| 240-380 | Verizon | WSHNGTNZN2 | 2007-09-17 | yes | yes |
| 240-381 | AT&T | WSHNGTNZN3 | – | – | yes |
| 240-382 | AT&T | HAGERSTOWN | 2009-06-11 | yes | yes |
| 240-383 | AT&T | WSHNGTNZN2 | – | yes | yes |
| 240-384 | Peerless | LXTNPKGRML | – | yes | yes |
| 240-385 | Verizon | MYERSVILLE | – | yes | yes |
| 240-386 | Verizon | WSNGTNZN10 | – | yes | yes |
| 240-387 | Windstream | WSNG236Z13 | – | yes | yes |
| 240-388 | T-Mobile | GAITHERSBG | 2002-11-04 | yes | yes |
| 240-389 | Windstream | ASHTON236 | – | yes | yes |
| 240-390 | Windstream | ASHTON236 | – | yes | yes |
| 240-391 | Onvoy | WSNG236Z13 | – | yes | yes |
| 240-392 | STARPOWER COMMUNICATIONS, LLC - MD | WSHNGTNZN5 | – | yes | yes |
| 240-393 | Verizon | WSHNGTNZN3 | – | yes | yes |
| 240-394 | AT&T | MOUNT AIRY | 2004-12-13 | yes | yes |
| 240-395 | Windstream | WSHNGTNZN2 | – | yes | yes |
| 240-396 | Lumen | WSHNGTNZN2 | – | yes | yes |
| 240-397 | Verizon | FREDERICK | 2009-03-06 | yes | yes |
| 240-398 | T-Mobile | WSHNGTNZN3 | 2002-07-03 | yes | yes |
| 240-399 | Verizon | WSNGTNZN10 | – | – | yes |
| 240-400 | T-Mobile | WSHNGTNZN2 | 2011-08-18 | yes | yes |
| 240-401 | AT&T | WSNGTNZN10 | – | – | yes |
| 240-402 | Verizon | WSNG236Z13 | 2010-09-21 | yes | yes |
| 240-403 | Windstream | WSNGTNZN10 | – | yes | yes |
| 240-404 | Verizon | GAITHERSBG | 2001-02-13 | yes | yes |
| 240-405 | Windstream | FREDERICK | 2004-07-27 | yes | yes |
| 240-406 | AT&T | WSNGTNZN10 | 2009-09-17 | yes | yes |
| 240-407 | Lumen | WSNGTNZN16 | – | yes | yes |
| 240-408 | AT&T | WSNGTNZN10 | 2009-10-14 | yes | yes |
| 240-409 | AT&T | FREDERICK | – | – | yes |
| 240-410 | T-Mobile | CUMBERLAND | 2021-01-13 | yes | yes |
| 240-412 | T-Mobile | WALDORF | 2001-01-16 | yes | yes |
| 240-413 | T-Mobile | WSHNGTNZN4 | 2001-03-12 | yes | yes |
| 240-414 | Peerless | WSHNGTNZN6 | – | yes | yes |
| 240-415 | YMAX COMMUNICATIONS CORP. - MD | FREDERICK | 2008-12-16 | yes | yes |
| 240-416 | AT&T | WALDORF | 2001-05-18 | yes | yes |
| 240-417 | T-Mobile | WSHNGTNZN5 | – | yes | yes |
| 240-418 | T-Mobile | WSHNGTNZN2 | 2001-11-12 | yes | yes |
| 240-419 | Verizon | WALDORF | 2007-10-29 | yes | yes |
| 240-420 | Verizon | HAGERSTOWN | – | yes | yes |
| 240-421 | T-Mobile | WSNGTNZN10 | 2001-04-09 | yes | yes |
| 240-422 | T-Mobile | FREDERICK | 2002-05-15 | yes | yes |
| 240-423 | T-Mobile | WSHNGTNZN3 | 2001-05-21 | – | yes |
| 240-424 | T-Mobile | WSHNGTNZN3 | 2007-11-16 | yes | yes |
| 240-425 | T-Mobile | WSHNGTNZN2 | – | yes | yes |
| 240-426 | T-Mobile | WSHNGTNZN2 | 2001-10-25 | yes | yes |
| 240-427 | Verizon | WALDORF | 2001-04-23 | yes | yes |
| 240-428 | Bandwidth | WSNGTNZN10 | – | yes | yes |
| 240-429 | Verizon | WSHNGTNZN3 | 2006-12-19 | yes | yes |
| 240-430 | Windstream | WSNGTNZN11 | – | yes | yes |
| 240-431 | T-Mobile | LXTNPKGRML | – | yes | yes |
| 240-432 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-433 | Windstream | WSNGTNZN12 | – | yes | yes |
| 240-434 | Lumen | LEONARDTN | – | yes | yes |
| 240-435 | Verizon | WALDORF | 2009-05-07 | yes | yes |
| 240-436 | Lumen | BUCKEYSTN | – | yes | yes |
| 240-437 | Verizon | ASHTON236 | – | yes | yes |
| 240-438 | T-Mobile | WSHNGTNZN3 | 2011-08-15 | yes | yes |
| 240-439 | Verizon | FREDERICK | 2008-06-06 | yes | yes |
| 240-440 | AT&T | FREDERICK | 2009-02-27 | yes | yes |
| 240-441 | T-Mobile | WSHNGTNZN6 | 2001-06-06 | – | yes |
| 240-442 | Verizon | OAKLAND | 2001-05-22 | yes | yes |
| 240-443 | Onvoy | WSHNGTNZN6 | 2020-11-06 | yes | yes |
| 240-444 | Verizon | LAUREL236 | 2011-09-07 | yes | yes |
| 240-445 | Onvoy | WSHNGTNZN2 | – | yes | yes |
| 240-446 | Verizon | FREDERICK | 2001-08-09 | yes | yes |
| 240-447 | AT&T | WSNGTNZN10 | – | – | yes |
| 240-448 | Onvoy | WALDORF | – | yes | yes |
| 240-449 | AT&T | GAITHERSBG | – | yes | yes |
| 240-450 | Windstream | WSHNGTNZN3 | – | yes | yes |
| 240-451 | Onvoy | THURMONT | 2016-09-02 | yes | yes |
| 240-452 | T-Mobile | HAGERSTOWN | 2010-07-22 | yes | yes |
| 240-453 | Verizon | WSNGTNZN10 | – | yes | yes |
| 240-454 | Windstream | GAITHERSBG | 2005-04-22 | yes | yes |
| 240-455 | Windstream | WSHNGTNZN5 | 2001-06-20 | yes | yes |
| 240-456 | Verizon | LAUREL236 | – | yes | yes |
| 240-457 | Verizon | FREDERICK | 2008-09-04 | yes | yes |
| 240-458 | Verizon | WALDORF | 2011-10-04 | yes | yes |
| 240-459 | Verizon | LAUREL236 | 2010-07-27 | yes | yes |
| 240-460 | AT&T | WSHNGTNZN3 | – | – | yes |
| 240-461 | AT&T | WSHNGTNZN3 | – | – | yes |
| 240-462 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-463 | AT&T | WSHNGTNZN3 | – | – | yes |
| 240-464 | T-Mobile | WSHNGTNZN2 | – | yes | yes |
| 240-465 | Peerless | WSHNGTNZN2 | – | yes | yes |
| 240-466 | AT&T | MECHANCSVL | 2001-07-10 | yes | yes |
| 240-467 | Comcast | WSHNGTNZN4 | 2013-04-25 | yes | yes |
| 240-468 | T-Mobile | WSHNGTNZN3 | 2007-11-16 | yes | yes |
| 240-469 | T-Mobile | HAGERSTOWN | 2008-02-14 | yes | yes |
| 240-470 | Verizon | LAUREL236 | 2011-10-04 | yes | yes |
| 240-471 | Onvoy | WSNGTNZN12 | – | yes | yes |
| 240-472 | AT&T | WSHNGTNZN3 | – | – | yes |
| 240-473 | Windstream | WSNG236Z13 | – | yes | yes |
| 240-474 | BALTIMORE-WASHINGTON TELEPHONE (BWT) | GAITHERSBG | 2015-05-22 | yes | yes |
| 240-475 | AT&T | WSHNGTNZN3 | – | – | yes |
| 240-476 | T-Mobile | WSHNGTNZN3 | 2001-02-21 | – | yes |
| 240-477 | Windstream | GAITHERSBG | 2005-05-20 | yes | yes |
| 240-478 | AT&T | WSHNGTNZN3 | 2004-07-27 | yes | yes |
| 240-479 | Verizon | WSHNGTNZN2 | 2008-04-07 | yes | yes |
| 240-480 | T-Mobile | WSHNGTNZN2 | 2010-09-27 | yes | yes |
| 240-481 | T-Mobile | WSHNGTNZN3 | 2001-05-11 | yes | yes |
| 240-482 | Windstream | WSHNGTNZN2 | – | yes | yes |
| 240-483 | Comcast | WSHNGTNZN2 | – | yes | yes |
| 240-484 | AT&T | LAUREL236 | 2017-06-12 | yes | yes |
| 240-485 | Windstream | WSHNGTNZN3 | – | yes | yes |
| 240-486 | T-Mobile | WSNG236Z14 | 2001-03-12 | yes | yes |
| 240-487 | Windstream | WSHNGTNZN4 | – | yes | yes |
| 240-488 | SHENTEL COMMUNICATIONS, LLC. - MD | OAKLAND | 2012-05-16 | yes | yes |
| 240-489 | Verizon | POOLESVL | 2001-02-13 | yes | yes |
| 240-490 | T-Mobile | MIDDLETOWN | 2001-06-12 | yes | yes |
| 240-491 | Lumen | WSHNGTNZN3 | – | yes | yes |
| 240-492 | Windstream | WSHNGTNZN5 | – | yes | yes |
| 240-493 | Windstream | WSHNGTNZN6 | – | yes | yes |
| 240-494 | Windstream | WSHNGTNZN3 | 2001-05-09 | yes | yes |
| 240-495 | Verizon | WSHNGTNZN4 | 2013-10-29 | yes | yes |
| 240-496 | Verizon | LEONARDTN | 2016-03-17 | yes | yes |
| 240-497 | Verizon | WSHNGTNZN2 | – | yes | yes |
| 240-498 | T-Mobile | WSHNGTNZN2 | – | yes | yes |
| 240-499 | Windstream | WSNGTNZN10 | – | yes | yes |
| 240-500 | Windstream | HAGERSTOWN | 2010-10-21 | yes | yes |
| 240-501 | T-Mobile | WSHNGTNZN3 | 2001-10-08 | yes | yes |
| 240-502 | Bandwidth | WSHNGTNZN3 | – | yes | yes |
| 240-503 | Peerless | TOMPKINSVL | 2013-04-09 | yes | yes |
| 240-504 | T-Mobile | WSHNGTNZN3 | 2011-10-04 | yes | yes |
| 240-505 | T-Mobile | WSHNGTNZN3 | 2001-10-31 | – | yes |
| 240-506 | AT&T | WSNGTNZN10 | 2002-01-09 | yes | yes |
| 240-507 | Verizon | WSHNGTNZN2 | 2008-09-05 | yes | yes |
| 240-508 | T-Mobile | WSHNGTNZN5 | – | yes | yes |
| 240-509 | Bandwidth | WSNG238Z14 | 2008-03-31 | yes | yes |
| 240-510 | Verizon | WSNG236Z15 | – | yes | yes |
| 240-512 | CORE COMMUNICATIONS, INC.- MD | WSNG238Z13 | 2006-08-08 | yes | yes |
| 240-513 | T-Mobile | HAGERSTOWN | 2011-10-19 | yes | yes |
| 240-514 | Windstream | WSNGTNZN11 | – | yes | yes |
| 240-515 | AT&T | WSHNGTNZN2 | 2001-06-20 | yes | yes |
| 240-516 | Windstream | WSNGTNZN12 | – | yes | yes |
| 240-517 | Verizon | LAUREL238 | 2014-10-28 | yes | yes |
| 240-518 | NUSO, LLC | WALDORF | – | yes | yes |
| 240-519 | AT&T | WSHNGTNZN2 | – | yes | yes |
| 240-520 | T-Mobile | HAGERSTOWN | 2006-03-29 | yes | yes |
| 240-521 | AT&T | LAUREL236 | 2018-01-11 | yes | yes |
| 240-522 | T-Mobile | CUMBERLAND | 2001-12-12 | yes | yes |
| 240-523 | Verizon | LA PLATA | 2001-02-13 | yes | yes |
| 240-524 | Peerless | LAUREL236 | – | yes | yes |
| 240-525 | Peerless | WSNG236Z15 | – | yes | yes |
| 240-526 | Peerless | LEONARDTN | – | yes | yes |
| 240-527 | Verizon | HAGERSTOWN | – | yes | yes |
| 240-528 | Lumen | HUGHESVL | – | yes | yes |
| 240-529 | Verizon | FREDERICK | – | yes | yes |
| 240-530 | CORE COMMUNICATIONS, INC.- MD | WALDORF | – | yes | yes |
| 240-531 | Telnyx | WSHNGTNZN3 | 2017-03-07 | yes | yes |
| 240-532 | Verizon | WSHNGTNZN5 | 2013-10-29 | yes | yes |
| 240-533 | AT&T | WSHNGTNZN3 | – | yes | yes |
| 240-534 | Verizon | WSHNGTNZN2 | 2016-04-11 | yes | yes |
| 240-535 | AT&T | WSHNGTNZN3 | 2001-01-09 | – | yes |
| 240-536 | Peerless | ASHTON236 | – | yes | yes |
| 240-537 | ATLANTECH ONLINE, INC. - MD | HAGERSTOWN | 2017-09-15 | yes | yes |
| 240-538 | Verizon | LEONARDTN | 2001-02-13 | yes | yes |
| 240-539 | Peerless | WSHNGTNZN4 | – | yes | yes |
| 240-540 | THE VOICE APPLICATION NETWORK, LLC | WSNG238Z13 | 2016-10-05 | yes | yes |
| 240-541 | AT&T | WSHNGTNZN2 | – | yes | yes |
| 240-542 | Windstream | WSNG236Z13 | – | yes | yes |
| 240-543 | T-Mobile | WSHNGTNZN2 | 2006-07-25 | yes | yes |
| 240-544 | Windstream | WSNG236Z14 | – | yes | yes |
| 240-545 | Windstream | WSNG236Z15 | – | yes | yes |
| 240-546 | Windstream | WSNGTNZN16 | – | yes | yes |
| 240-547 | Lumen | LAUREL236 | – | yes | yes |
| 240-548 | CORE COMMUNICATIONS, INC.- MD | WSNG236Z14 | – | yes | yes |
| 240-549 | Verizon | FREDERICK | 2016-03-17 | yes | yes |
| 240-550 | AT&T | WSNGTNZN10 | 2009-03-26 | yes | yes |
| 240-551 | AT&T | WSNGTNZN10 | 2009-03-25 | yes | yes |
| 240-552 | AT&T | WSNGTNZN10 | 2009-03-25 | yes | yes |
| 240-553 | Verizon | WSNG236Z13 | – | yes | yes |
| 240-554 | Verizon | LAUREL236 | – | yes | yes |
| 240-556 | Windstream | WSNG236Z14 | – | yes | yes |
| 240-557 | T-Mobile | WSHNGTNZN6 | 2017-03-14 | yes | yes |
| 240-558 | Windstream | WSNGTNZN11 | – | yes | yes |
| 240-559 | Verizon | ASHTON236 | – | yes | yes |
| 240-560 | Verizon | WSNGTNZN12 | 2001-04-23 | yes | yes |
| 240-561 | Verizon | LEONARDTN | 2008-07-07 | yes | yes |
| 240-562 | Verizon | GAITHERSBG | 2015-06-12 | yes | yes |
| 240-563 | Onvoy | WSHNGTNZN5 | 2017-07-05 | yes | yes |
| 240-564 | T-Mobile | LAUREL236 | 2018-12-21 | yes | yes |
| 240-565 | T-Mobile | LAUREL238 | 2005-12-30 | yes | yes |
| 240-566 | Verizon | FREDERICK | 2002-06-11 | yes | yes |
| 240-567 | Verizon | WSNGTNZN10 | 2006-07-12 | yes | yes |
| 240-568 | Verizon | LAUREL236 | – | – | yes |
| 240-569 | Bandwidth | FLINTSTONE | 2017-09-22 | yes | yes |
| 240-570 | Onvoy | ASHTON238 | 2016-02-24 | yes | yes |
| 240-571 | Verizon | LAUREL238 | 2021-01-14 | yes | yes |
| 240-572 | Verizon | LEONARDTN | 2017-11-15 | yes | yes |
| 240-573 | Lumen | WSNG236Z15 | – | yes | yes |
| 240-574 | AT&T | FRIENDSVL | 2020-08-27 | yes | yes |
| 240-575 | Lumen | FREDERICK | 2005-12-30 | yes | yes |
| 240-576 | Vonage | HAGERSTOWN | 2017-12-20 | yes | yes |
| 240-577 | Verizon | LEONARDTN | 2006-08-09 | yes | yes |
| 240-578 | Verizon | FREDERICK | 2011-07-08 | yes | yes |
| 240-579 | T-Mobile | ASHTON236 | 2018-01-11 | yes | yes |
| 240-580 | T-Mobile | CUMBERLAND | 2001-06-14 | yes | yes |
| 240-581 | Windstream | LAUREL236 | – | yes | yes |
| 240-582 | Verizon | WSHNGTNZN4 | – | yes | yes |
| 240-583 | Verizon | LAUREL236 | 2010-04-28 | yes | yes |
| 240-584 | T-Mobile | LAUREL236 | 2018-01-11 | yes | yes |
| 240-585 | Verizon | WALDORF | 2011-06-29 | yes | yes |
| 240-586 | Verizon | FREDERICK | 2006-12-22 | yes | yes |
| 240-587 | Verizon | LEONARDTN | 2009-07-06 | yes | yes |
| 240-588 | Verizon | GRANTSVL | 2018-02-01 | yes | yes |
| 240-589 | AT&T | MCCOOLE | 2018-03-07 | yes | yes |
| 240-590 | T-Mobile | WSNGTNZN12 | 2018-04-09 | yes | yes |
| 240-591 | SHENTEL COMMUNICATIONS, LLC. - MD | HAGERSTOWN | 2018-04-17 | yes | yes |
| 240-592 | Verizon | WSNG236Z13 | 2016-07-01 | yes | yes |
| 240-593 | T-Mobile | LAUREL238 | 2001-03-13 | yes | yes |
| 240-594 | Bandwidth | BITTINGER | 2018-05-15 | yes | yes |
| 240-595 | Verizon | WSHNGTNZN3 | 2006-09-13 | yes | yes |
| 240-596 | CORE COMMUNICATIONS, INC.- MD | ASHTON236 | 2018-06-11 | yes | yes |
| 240-597 | Peerless | GAITHERSBG | – | yes | yes |
| 240-598 | CORE COMMUNICATIONS, INC.- MD | HUGHESVL | 2018-06-11 | yes | yes |
| 240-599 | Lumen | WSNGTNZN10 | – | yes | yes |
| 240-600 | T-Mobile | WSHNGTNZN2 | 2011-04-27 | yes | yes |
| 240-601 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-602 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-603 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-604 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-605 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-606 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-607 | Lumen | WALDORF | – | yes | yes |
| 240-608 | NUSO, LLC | FREDERICK | 2013-03-11 | yes | yes |
| 240-609 | AT&T | CUMBERLAND | 2014-09-11 | yes | yes |
| 240-610 | CORE COMMUNICATIONS, INC.- MD | WSHNGTNZN4 | 2018-06-11 | yes | yes |
| 240-612 | Lumen | WSHNGTNZN5 | – | yes | yes |
| 240-613 | Windstream | WSHNGTNZN4 | 2012-04-05 | yes | yes |
| 240-614 | T-Mobile | WSNGTNZN10 | 2013-07-16 | yes | yes |
| 240-615 | T-Mobile | WSHNGTNZN4 | 2013-05-29 | yes | yes |
| 240-616 | Verizon | WSNG236Z13 | – | yes | yes |
| 240-617 | Bandwidth | HIGHFIELD | 2015-07-16 | yes | yes |
| 240-618 | Verizon | WSNGTNZN10 | 2014-10-07 | yes | yes |
| 240-619 | Comcast | WSHNGTNZN5 | – | yes | yes |
| 240-620 | Verizon | WSNGTNZN10 | – | yes | yes |
| 240-621 | Bandwidth | WSNGTNZN11 | – | yes | yes |
| 240-622 | CORE COMMUNICATIONS, INC.- MD | LA PLATA | 2018-06-11 | yes | yes |
| 240-623 | Bandwidth | WSHNGTNZN4 | 2014-12-08 | yes | yes |
| 240-624 | Verizon | WSNG236Z13 | – | yes | yes |
| 240-625 | T-Mobile | HAGERSTOWN | 2001-04-17 | yes | yes |
| 240-626 | T-Mobile | FREDERICK | – | yes | yes |
| 240-627 | Lumen | WSNGTNZN11 | – | yes | yes |
| 240-628 | CORE COMMUNICATIONS, INC.- MD | MECHANCSVL | 2018-06-11 | yes | yes |
| 240-629 | Verizon | FREDERICK | – | yes | yes |
| 240-630 | Bandwidth | WSHNGTNZN2 | 2011-10-31 | yes | yes |
| 240-631 | Verizon | GAITHERSBG | – | – | yes |
| 240-632 | Verizon | GAITHERSBG | – | – | yes |
| 240-633 | BALTIMORE-WASHINGTON TELEPHONE (BWT) | HUGHESVL | 2015-05-22 | yes | yes |
| 240-634 | CORE COMMUNICATIONS, INC.- MD | RIDGE | 2018-06-11 | yes | yes |
| 240-635 | CORE COMMUNICATIONS, INC.- MD | TOMPKINSVL | 2018-06-11 | yes | yes |
| 240-636 | T-Mobile | LAUREL236 | – | yes | yes |
| 240-637 | CORE COMMUNICATIONS, INC.- MD | WSHNGTNZN3 | 2018-06-11 | yes | yes |
| 240-638 | Lumen | WSHNGTNZN3 | – | yes | yes |
| 240-639 | CORE COMMUNICATIONS, INC.- MD | LAUREL236 | 2018-06-01 | yes | yes |
| 240-640 | AT&T | WALDORF | 2009-03-24 | yes | yes |
| 240-641 | Peerless | WSHNGTNZN3 | – | yes | yes |
| 240-642 | ADVANCED TELECOM SOLUTIONS, LLC | WSNGTNZN10 | 2018-08-02 | yes | yes |
| 240-643 | T-Mobile | WSHNGTNZN3 | 2002-05-16 | yes | yes |
| 240-644 | Verizon | WSHNGTNZN2 | – | yes | yes |
| 240-645 | Verizon | WSHNGTNZN3 | – | yes | yes |
| 240-646 | Windstream | LAUREL236 | – | yes | yes |
| 240-647 | CORE COMMUNICATIONS, INC.- MD | CLEAR SPG | 2018-06-11 | yes | yes |
| 240-648 | CORE COMMUNICATIONS, INC.- MD | KEEDYSVL | 2018-06-12 | yes | yes |
| 240-649 | CORE COMMUNICATIONS, INC.- MD | SMITHSBURG | 2018-06-12 | yes | yes |
| 240-650 | Onvoy | WSHNGTNZN3 | 2011-11-17 | yes | yes |
| 240-651 | Verizon | FREDERICK | – | yes | yes |
| 240-652 | Verizon | MECHANCSVL | 2001-02-13 | yes | yes |
| 240-653 | Peerless | LAUREL238 | – | yes | yes |
| 240-654 | AT&T | GAITHERSBG | 2006-05-19 | yes | yes |
| 240-655 | Onvoy | KITZMILLER | 2017-12-18 | yes | yes |
| 240-656 | AT&T | FREDERICK | 2019-08-30 | yes | yes |
| 240-657 | Verizon | FROSTBURG | 2016-01-06 | yes | yes |
| 240-658 | Vonage | GAITHERSBG | 2018-12-04 | yes | yes |
| 240-659 | T-Mobile | ASHTON236 | 2019-01-30 | yes | yes |
| 240-660 | Verizon | WSNGTNZN10 | 2015-03-31 | yes | yes |
| 240-661 | BALTIMORE-WASHINGTON TELEPHONE (BWT) | LXTNPKGRML | 2015-05-21 | yes | yes |
| 240-662 | Verizon | WSHNGTNZN3 | – | – | yes |
| 240-663 | T-Mobile | MIDDLETOWN | 2019-01-30 | yes | yes |
| 240-664 | Peerless | CUMBERLAND | 2019-03-06 | yes | yes |
| 240-665 | T-Mobile | WSNGTNZN10 | 2017-01-09 | yes | yes |
| 240-666 | Onvoy | NANJEMOY | – | yes | yes |
| 240-667 | Lumen | WSHNGTNZN4 | – | yes | yes |
| 240-668 | STARPOWER COMMUNICATIONS, LLC - MD | DAMASCS236 | – | yes | yes |
| 240-669 | Comcast | WSNGTNZN11 | – | yes | yes |
| 240-670 | Bandwidth | WSHNGTNZN3 | – | yes | yes |
| 240-671 | T-Mobile | WSHNGTNZN2 | – | yes | yes |
| 240-672 | Verizon | WSNGTNZN10 | – | yes | yes |
| 240-673 | Bandwidth | WSHNGTNZN2 | 2019-05-17 | yes | yes |
| 240-674 | T-Mobile | FREDERICK | – | yes | yes |
| 240-675 | AT&T | MYERSVILLE | – | – | yes |
| 240-676 | Verizon | WSHNGTNZN3 | – | yes | yes |
| 240-677 | Verizon | WSHNGTNZN5 | 2019-05-20 | yes | yes |
| 240-678 | Verizon | WSHNGTNZN3 | – | yes | yes |
| 240-679 | CORE COMMUNICATIONS, INC.- MD | FRIENDSVL | 2018-06-11 | yes | yes |
| 240-680 | Peerless | FREDERICK | 2018-10-29 | yes | yes |
| 240-681 | Windstream | BRANDYWINE | 2003-10-30 | yes | yes |
| 240-682 | STARPOWER COMMUNICATIONS, LLC - MD | WALDORF | – | yes | yes |
| 240-683 | Verizon | GAITHERSBG | – | – | yes |
| 240-684 | Verizon | WSNG236Z13 | – | yes | yes |
| 240-685 | Lumen | BRANDYWINE | – | yes | yes |
| 240-686 | Verizon | GAITHERSBG | – | yes | yes |
| 240-687 | Verizon | WSHNGTNZN3 | – | – | yes |
| 240-688 | Verizon | WSHNGTNZN3 | 2006-06-12 | yes | yes |
| 240-689 | CSC WIRELESS, LLC | WSNG236Z15 | 2019-05-28 | yes | yes |
| 240-690 | AT&T | GAITHERSBG | 2016-11-10 | yes | yes |
| 240-691 | Lumen | WSHNGTNZN5 | – | yes | yes |
| 240-692 | Lumen | GRANTSVL | 2019-05-30 | yes | yes |
| 240-693 | Peerless | WALKERSVL | 2019-09-25 | yes | yes |
| 240-694 | Verizon | WSHNGTNZN2 | – | yes | yes |
| 240-695 | Verizon | WSHNGTNZN5 | – | yes | yes |
| 240-696 | Lumen | WSHNGTNZN4 | – | yes | yes |
| 240-697 | CORETEL MARYLAND, INC. - MD | MECHANCSVL | 2019-09-12 | yes | yes |
| 240-698 | T-Mobile | MYERSVILLE | 2019-10-15 | yes | yes |
| 240-699 | Verizon | BUCKEYSTN | 2001-05-22 | yes | yes |
| 240-701 | AT&T | WSHNGTNZN3 | 2009-03-25 | yes | yes |
| 240-702 | Verizon | GAITHERSBG | 2014-10-07 | yes | yes |
| 240-703 | T-Mobile | ASHTON236 | 2021-02-10 | yes | yes |
| 240-704 | AT&T | WSHNGTNZN3 | 2009-03-25 | yes | yes |
| 240-705 | AT&T | WSHNGTNZN3 | 2009-03-25 | yes | yes |
| 240-706 | AT&T | WSHNGTNZN3 | 2009-03-26 | yes | yes |
| 240-707 | AT&T | HAGERSTOWN | 2012-01-27 | yes | yes |
| 240-708 | Lumen | LAUREL238 | 2012-06-08 | yes | yes |
| 240-709 | T-Mobile | LAUREL236 | 2019-10-25 | yes | yes |
| 240-710 | Verizon | FREDERICK | 2019-12-30 | yes | yes |
| 240-712 | Verizon | LAUREL238 | 2011-11-01 | yes | yes |
| 240-713 | Peerless | LAUREL236 | 2011-11-02 | yes | yes |
| 240-714 | T-Mobile | WSHNGTNZN4 | 2015-02-20 | yes | yes |
| 240-715 | Lumen | WSNGTNZN10 | – | yes | yes |
| 240-716 | T-Mobile | WSHNGTNZN5 | 2013-11-15 | yes | yes |
| 240-717 | Charter | LEONARDTN | 2021-04-22 | yes | yes |
| 240-718 | Verizon | LXTNPKGRML | 2001-02-13 | yes | yes |
| 240-719 | Verizon | WSHNGTNZN5 | 2016-04-11 | yes | yes |
| 240-720 | Lumen | GAITHERSBG | – | yes | yes |
| 240-721 | Verizon | WSHNGTNZN5 | 2020-03-19 | yes | yes |
| 240-722 | T-Mobile | ASHTON236 | – | yes | yes |
| 240-723 | Verizon | WSHNGTNZN3 | – | yes | yes |
| 240-724 | Windstream | WSHNGTNZN6 | – | yes | yes |
| 240-725 | Verizon | LXTNPKGRML | – | yes | yes |
| 240-726 | NUSO, LLC | WSHNGTNZN4 | 2020-09-01 | yes | yes |
| 240-727 | AT&T | CUMBERLAND | – | yes | yes |
| 240-728 | Vonage | WSNGTNZN10 | 2020-05-12 | yes | yes |
| 240-729 | T-Mobile | ASHTON236 | 2020-06-16 | yes | yes |
| 240-730 | HD CARRIER LLC | HAGERSTOWN | 2020-08-12 | yes | yes |
| 240-731 | AT&T | WSNGTNZN10 | – | – | yes |
| 240-732 | AT&T | MOUNT AIRY | 2015-11-12 | yes | yes |
| 240-733 | FRACTEL, LLC | ASHTON236 | 2020-07-15 | yes | yes |
| 240-734 | Bandwidth | SMITHSBURG | 2012-03-22 | yes | yes |
| 240-735 | NUSO, LLC | BRUNSWICK | 2020-09-01 | yes | yes |
| 240-736 | AT&T | LAUREL236 | 2020-09-02 | yes | yes |
| 240-737 | Windstream | WSHNGTNZN4 | 2001-05-09 | – | yes |
| 240-738 | Verizon | HANCOCK | 2020-09-03 | yes | yes |
| 240-739 | IP HORIZON LLC | FREDERICK | 2020-09-15 | yes | yes |
| 240-740 | ATLANTECH ONLINE, INC. - MD | WSNGTNZN10 | 2015-09-03 | yes | yes |
| 240-741 | AIRESPRING, INC. | FREDERICK | 2020-10-01 | yes | yes |
| 240-742 | NUSO, LLC | WSNG238Z14 | 2020-11-20 | yes | yes |
| 240-743 | Verizon | WSHNGTNZN2 | – | yes | yes |
| 240-744 | Lumen | WSHNGTNZN2 | – | yes | yes |
| 240-745 | Verizon | DAMASCS236 | – | yes | yes |
| 240-746 | AT&T | BRANDYWINE | 2020-12-04 | yes | yes |
| 240-747 | Windstream | WSNGTNZN11 | 2001-05-09 | yes | yes |
| 240-748 | AT&T | WSHNGTNZN3 | 2020-12-23 | yes | yes |
| 240-749 | Verizon | LAUREL238 | 2021-01-12 | yes | yes |
| 240-750 | AT&T | GAITHERSBG | 2005-05-06 | yes | yes |
| 240-751 | Lumen | GAITHERSBG | – | yes | yes |
| 240-752 | Lumen | WSHNGTNZN2 | – | yes | yes |
| 240-753 | Lumen | WSNGTNZN10 | – | yes | yes |
| 240-754 | Lumen | WALDORF | 2011-11-11 | yes | yes |
| 240-755 | Comcast | LAUREL238 | 2006-01-05 | yes | yes |
| 240-756 | T-Mobile | WSNGTNZN10 | 2021-02-10 | yes | yes |
| 240-757 | Peerless | WSNG236Z13 | – | yes | yes |
| 240-758 | AT&T | LAUREL236 | 2016-03-03 | yes | yes |
| 240-759 | Onvoy | WSNG238Z15 | 2021-03-25 | yes | yes |
| 240-760 | Verizon | WSHNGTNZN2 | 2015-09-22 | yes | yes |
| 240-761 | AT&T | LAUREL236 | 2021-07-20 | yes | yes |
| 240-762 | Verizon | WSHNGTNZN2 | 2012-08-22 | yes | yes |
| 240-763 | Bandwidth | WSNG238Z15 | 2015-10-01 | yes | yes |
| 240-764 | Verizon | WSHNGTNZN4 | – | yes | yes |
| 240-765 | Verizon | WSHNGTNZN5 | – | yes | yes |
| 240-766 | Verizon | WSHNGTNZN6 | – | yes | yes |
| 240-767 | Windstream | WSHNGTNZN5 | 2001-05-09 | yes | yes |
| 240-768 | Charter | NANJEMOY | 2021-04-22 | yes | yes |
| 240-769 | Bandwidth | KEEDYSVL | 2021-07-20 | yes | yes |
| 240-770 | Comcast | WSHNGTNZN4 | 2004-11-22 | yes | yes |
| 240-771 | Onvoy | POOLESVL | 2016-02-18 | yes | yes |
| 240-772 | Verizon | FREDERICK | 2011-11-17 | yes | yes |
| 240-773 | Verizon | WSNGTNZN10 | – | – | yes |
| 240-774 | Bandwidth | LONACONING | 2015-10-05 | yes | yes |
| 240-775 | Bandwidth | WESTERNPT | 2015-10-05 | yes | yes |
| 240-776 | Lumen | LA PLATA | – | yes | yes |
| 240-777 | Verizon | WSNGTNZN10 | – | – | yes |
| 240-778 | Verizon | WSNGTNZN10 | – | yes | yes |
| 240-779 | Windstream | ASHTON236 | – | yes | yes |
| 240-780 | Lumen | GAITHERSBG | – | yes | yes |
| 240-781 | Verizon | WSHNGTNZN2 | 2015-08-18 | yes | yes |
| 240-782 | Onvoy | DAMASCS236 | – | yes | yes |
| 240-783 | MTE, INC. DBA MTE PAGING NETWORK | WSHNGTNZN2 | – | – | yes |
| 240-784 | T-Mobile | MYERSVILLE | 2001-06-06 | yes | yes |
| 240-785 | Bandwidth | OAKLAND | 2021-07-20 | yes | yes |
| 240-786 | Lumen | LAUREL236 | – | yes | yes |
| 240-787 | Lumen | BRANDYWINE | – | yes | yes |
| 240-788 | Lumen | WSHNGTNZN5 | – | yes | yes |
| 240-789 | ADVANCED TELECOM SOLUTIONS, LLC | WSNGTNZN10 | 2021-08-10 | yes | yes |
| 240-790 | Lumen | WSNG236Z13 | – | yes | yes |
| 240-791 | T-Mobile | WSHNGTNZN4 | 2021-08-11 | yes | yes |
| 240-792 | T-Mobile | FREDERICK | 2021-08-11 | yes | yes |
| 240-793 | T-Mobile | GAITHERSBG | 2001-03-15 | yes | yes |
| 240-794 | Lumen | LXTNPKGRML | – | yes | yes |
| 240-795 | Verizon | WSHNGTNZN5 | 2021-08-12 | yes | yes |
| 240-796 | T-Mobile | WSNGTNZN10 | 2021-08-25 | yes | yes |
| 240-797 | T-Mobile | ASHTON236 | 2021-08-25 | yes | yes |
| 240-798 | Onvoy | GAITHERSBG | 2021-09-01 | yes | yes |
| 240-799 | FRACTEL, LLC | BRANDYWINE | 2020-06-26 | yes | yes |
| 240-800 | CORE COMMUNICATIONS, INC.- MD | WSHNGTNZN2 | 2012-06-22 | yes | yes |
| 240-801 | Verizon | GAITHERSBG | 2013-10-04 | yes | yes |
| 240-802 | NUSO, LLC | WSHNGTNZN2 | 2013-05-10 | yes | yes |
| 240-803 | AT&T | CUMBERLAND | 2012-01-27 | yes | yes |
| 240-804 | Onvoy | TOMPKINSVL | – | yes | yes |
| 240-805 | Verizon | GAITHERSBG | 2015-11-17 | yes | yes |
| 240-806 | Peerless | INDIANHEAD | 2015-09-30 | yes | yes |
| 240-807 | T-Mobile | CUMBERLAND | 2021-09-01 | yes | yes |
| 240-808 | Verizon | LEONARDTN | 2015-03-31 | yes | yes |
| 240-809 | Onvoy | SMITHSBURG | 2021-09-01 | yes | yes |
| 240-810 | T-Mobile | WSNGTNZN10 | 2016-04-05 | yes | yes |
| 240-812 | Lumen | POOLESVL | – | yes | yes |
| 240-813 | Windstream | GAITHERSBG | – | yes | yes |
| 240-814 | Verizon | LAUREL236 | 2022-05-20 | yes | yes |
| 240-815 | Verizon | FREDERICK | 2015-11-17 | yes | yes |
| 240-816 | Bandwidth | KEEDYSVL | 2015-10-05 | yes | yes |
| 240-817 | T-Mobile | ASHTON236 | 2016-01-12 | yes | yes |
| 240-818 | Verizon | MYERSVILLE | – | yes | yes |
| 240-819 | Onvoy | WILLIAMSPT | 2021-09-01 | yes | yes |
| 240-820 | Onvoy | ASHTON238 | 2021-03-25 | yes | yes |
| 240-821 | Windstream | WSHNGTNZN3 | 2005-05-27 | yes | yes |
| 240-822 | Onvoy | NEW MARKET | 2021-03-15 | yes | yes |
| 240-823 | Verizon | BRANDYWINE | 2001-02-13 | yes | yes |
| 240-824 | Onvoy | FROSTBURG | 2021-03-15 | yes | yes |
| 240-825 | Verizon | WSHNGTNZN4 | 2016-03-17 | yes | yes |
| 240-826 | Verizon | WSNGTNZN10 | 2007-05-07 | yes | yes |
| 240-827 | Onvoy | LONACONING | 2021-09-01 | yes | yes |
| 240-828 | Telnyx | WSHNGTNZN4 | – | yes | yes |
| 240-829 | CORETEL MARYLAND, INC. - MD | EMMITSBURG | 2019-09-12 | yes | yes |
| 240-830 | Comcast | WSHNGTNZN5 | 2015-11-10 | yes | yes |
| 240-831 | Onvoy | FREDERICK | 2016-04-26 | yes | yes |
| 240-832 | T-Mobile | WSHNGTNZN2 | – | yes | yes |
| 240-833 | Verizon | WSNGTNZN11 | – | yes | yes |
| 240-834 | Onvoy | KITZMILLER | 2021-03-15 | yes | yes |
| 240-835 | Charter | CLEAR SPG | 2021-06-03 | yes | yes |
| 240-836 | Onvoy | MT SAVAGE | 2021-09-01 | yes | yes |
| 240-837 | Verizon | HUGHESVL | 2001-02-13 | yes | yes |
| 240-838 | T-Mobile | WSHNGTNZN5 | 2001-03-12 | yes | yes |
| 240-839 | Verizon | WSHNGTNZN3 | 2007-01-13 | yes | yes |
| 240-840 | Charter | FREDERICK | 2018-06-19 | yes | yes |
| 240-841 | Verizon | LAUREL238 | – | yes | yes |
| 240-842 | Verizon | WSNG238Z14 | – | yes | yes |
| 240-843 | Verizon | WSNG238Z13 | – | yes | yes |
| 240-844 | Onvoy | RIDGE | – | yes | yes |
| 240-845 | Verizon | WSNG236Z13 | – | yes | yes |
| 240-846 | Verizon | WSNGTNZN16 | – | yes | yes |
| 240-847 | Onvoy | WSHNGTNZN3 | 2015-12-09 | yes | yes |
| 240-848 | T-Mobile | GAITHERSBG | – | yes | yes |
| 240-849 | AT&T | HAGERSTOWN | 2021-09-08 | yes | yes |
| 240-850 | Peerless | HAGERSTOWN | 2016-05-25 | yes | yes |
| 240-851 | Onvoy | MCCOOLE | 2020-07-16 | yes | yes |
| 240-852 | T-Mobile | MYERSVILLE | 2021-09-13 | yes | yes |
| 240-853 | Bandwidth | LAUREL236 | 2021-09-28 | yes | yes |
| 240-854 | T-Mobile | WSHNGTNZN4 | 2021-12-07 | yes | yes |
| 240-855 | T-Mobile | WSHNGTNZN2 | 2006-10-09 | yes | yes |
| 240-856 | Verizon | LAUREL238 | 2016-04-11 | yes | yes |
| 240-857 | Lumen | WSHNGTNZN5 | – | – | yes |
| 240-858 | Verizon | WSHNGTNZN2 | 2016-07-12 | yes | yes |
| 240-859 | Onvoy | ASHTON238 | 2016-07-11 | yes | yes |
| 240-860 | Peerless | CUMBERLAND | 2016-08-23 | yes | yes |
| 240-861 | T-Mobile | ASHTON236 | 2021-10-07 | yes | yes |
| 240-862 | Onvoy | MT SAVAGE | 2016-09-02 | yes | yes |
| 240-863 | Lumen | WSHNGTNZN3 | – | yes | yes |
| 240-864 | Windstream | WSNGTNZN10 | 2001-05-09 | – | yes |
| 240-865 | Lumen | WSNG238Z14 | – | yes | yes |
| 240-866 | TERRA NOVA TELECOM INC. | HAGERSTOWN | 2019-09-20 | yes | yes |
| 240-867 | COMMIO, LLC | WSHNGTNZN3 | 2017-06-20 | yes | yes |
| 240-868 | Windstream | WSNGTNZN12 | 2001-05-09 | yes | yes |
| 240-869 | T-Mobile | WSNGTNZN10 | 2021-10-07 | yes | yes |
| 240-870 | Onvoy | MIDDLETOWN | 2016-09-02 | yes | yes |
| 240-871 | T-Mobile | LXTNPKGRML | 2021-10-07 | yes | yes |
| 240-872 | T-Mobile | WSHNGTNZN6 | 2021-10-07 | yes | yes |
| 240-873 | Onvoy | BUCKEYSTN | 2019-10-10 | yes | yes |
| 240-874 | Onvoy | THURMONT | 2019-10-10 | yes | yes |
| 240-875 | Onvoy | MOUNT AIRY | 2019-10-10 | yes | yes |
| 240-876 | T-Mobile | WSHNGTNZN2 | – | yes | yes |
| 240-877 | Onvoy | FREDERICK | 2016-08-25 | yes | yes |
| 240-878 | COMMIO, LLC | HAGERSTOWN | 2017-08-03 | yes | yes |
| 240-879 | T-Mobile | WSHNGTNZN4 | 2021-10-07 | yes | yes |
| 240-880 | Lumen | WSNGTNZN11 | – | yes | yes |
| 240-881 | Bandwidth | WSNG238Z13 | 2021-11-04 | yes | yes |
| 240-882 | T-Mobile | WSHNGTNZN5 | – | yes | yes |
| 240-883 | Lumen | ASHTON236 | – | yes | yes |
| 240-884 | Charter | TOMPKINSVL | 2021-04-29 | yes | yes |
| 240-885 | Onvoy | WSNGTNZN10 | 2021-01-21 | yes | yes |
| 240-886 | T-Mobile | WSHNGTNZN4 | 2021-11-17 | yes | yes |
| 240-887 | T-Mobile | ASHTON236 | 2021-12-07 | yes | yes |
| 240-888 | AT&T | WSNGTNZN10 | – | – | yes |
| 240-889 | T-Mobile | WSNGTNZN10 | 2021-12-06 | yes | yes |
| 240-890 | Verizon | WSHNGTNZN5 | 2021-12-07 | yes | yes |
| 240-891 | Lumen | DAMASCS240 | 2021-12-10 | yes | yes |
| 240-892 | Lumen | WSNG236Z15 | – | yes | yes |
| 240-893 | AT&T | WSHNGTNZN3 | – | – | yes |
| 240-894 | Dish | LXTNPKGRML | 2021-12-10 | yes | yes |
| 240-895 | Verizon | LXTNPKGRML | – | yes | yes |
| 240-896 | Dish | HAGERSTOWN | 2021-12-28 | yes | yes |
| 240-897 | Lumen | WSNGTNZN16 | – | yes | yes |
| 240-898 | Lumen | WSHNGTNZN4 | – | yes | yes |
| 240-899 | T-Mobile | WSHNGTNZN2 | 2001-03-13 | – | yes |
| 240-900 | Onvoy | WSHNGTNZN4 | 2015-02-18 | yes | yes |
| 240-901 | Lumen | LA PLATA | 2014-05-22 | yes | yes |
| 240-902 | Twilio | DAMASCS240 | 2021-12-28 | yes | yes |
| 240-903 | Comcast | INDIANHEAD | 2013-12-03 | yes | yes |
| 240-904 | Verizon | LAUREL238 | 2016-06-23 | yes | yes |
| 240-905 | T-Mobile | BRANDYWINE | 2022-01-10 | yes | yes |
| 240-906 | T-Mobile | WSHNGTNZN4 | – | yes | yes |
| 240-907 | Verizon | WSNGTNZN10 | 2016-07-12 | yes | yes |
| 240-908 | Onvoy | WALKERSVL | 2016-09-02 | yes | yes |
| 240-909 | T-Mobile | LAUREL236 | 2022-01-11 | yes | yes |
| 240-910 | Onvoy | FREDERICK | 2021-03-03 | yes | yes |
| 240-912 | Windstream | GAITHERSBG | – | yes | yes |
| 240-913 | Onvoy | DAMASCS240 | 2016-09-02 | yes | yes |
| 240-914 | Dish | HIGHFIELD | 2022-01-11 | yes | yes |
| 240-915 | Telnyx | NEW MARKET | – | yes | yes |
| 240-916 | T-Mobile | CUMBERLAND | – | yes | yes |
| 240-917 | AT&T | LAUREL236 | 2015-11-12 | yes | yes |
| 240-918 | T-Mobile | ASHTON236 | 2016-10-20 | yes | yes |
| 240-919 | T-Mobile | ASHTON236 | 2022-01-26 | yes | yes |
| 240-920 | Lumen | CUMBERLAND | 2001-05-03 | yes | yes |
| 240-921 | T-Mobile | WSNGTNZN10 | 2022-01-26 | yes | yes |
| 240-922 | FRACTEL, LLC | WSNGTNZN11 | 2020-07-15 | yes | yes |
| 240-923 | T-Mobile | WSHNGTNZN6 | 2022-01-26 | yes | yes |
| 240-924 | Bandwidth | MOUNT AIRY | 2022-02-10 | yes | yes |
| 240-925 | Verizon | LEONARDTN | 2001-08-09 | yes | yes |
| 240-926 | T-Mobile | HUGHESVL | 2022-05-18 | yes | yes |
| 240-927 | T-Mobile | WSHNGTNZN4 | 2022-05-18 | yes | yes |
| 240-928 | AT&T | MYERSVILLE | 2022-05-26 | yes | yes |
| 240-929 | Windstream | WSNG236Z14 | – | yes | yes |
| 240-930 | Verizon | LAUREL238 | 2022-06-29 | yes | yes |
| 240-931 | NUSO, LLC | FREDERICK | – | yes | yes |
| 240-932 | Bandwidth | WSNG236Z14 | 2022-06-30 | yes | yes |
| 240-933 | TON80 COMMUNICATIONS, LLC | BUCKEYSTN | 2022-02-28 | yes | yes |
| 240-934 | TON80 COMMUNICATIONS, LLC | MIDDLETOWN | 2021-02-12 | yes | yes |
| 240-935 | Verizon | LAUREL236 | 2022-07-12 | yes | yes |
| 240-936 | T-Mobile | ASHTON236 | 2022-05-18 | yes | yes |
| 240-937 | Bandwidth | GAITHERSBG | 2022-07-22 | yes | yes |
| 240-938 | T-Mobile | ASHTON236 | 2001-06-06 | yes | yes |
| 240-939 | Bandwidth | WSNGTNZN11 | 2022-07-26 | yes | yes |
| 240-940 | Bandwidth | WSHNGTNZN4 | 2022-07-26 | yes | yes |
| 240-941 | Bandwidth | WSHNGTNZN2 | 2022-08-03 | yes | yes |
| 240-942 | Onvoy | BITTINGER | 2021-03-15 | yes | yes |
| 240-943 | Comcast | FROSTBURG | 2022-08-05 | yes | yes |
| 240-944 | Onvoy | WESTERNPT | 2021-03-15 | yes | yes |
| 240-945 | Onvoy | WSHNGTNZN3 | 2020-11-06 | yes | yes |
| 240-946 | FRACTEL, LLC | WSNG236Z14 | 2021-10-25 | yes | yes |
| 240-947 | AT&T | MYERSVILLE | 2022-08-16 | yes | yes |
| 240-948 | Bandwidth | LEONARDTN | 2022-08-25 | yes | yes |
| 240-949 | Windstream | WSNGTNZN16 | 2001-05-09 | yes | yes |
| 240-951 | AT&T | HAGERSTOWN | 2022-03-24 | yes | yes |
| 240-952 | AT&T | HAGERSTOWN | 2022-03-24 | yes | yes |
| 240-953 | AT&T | HAGERSTOWN | 2022-03-24 | yes | yes |
| 240-954 | AT&T | HAGERSTOWN | 2022-03-24 | yes | yes |
| 240-955 | Bandwidth | LA PLATA | 2022-08-25 | yes | yes |
| 240-956 | Onvoy | WSHNGTNZN2 | 2020-11-06 | yes | yes |
| 240-957 | Bandwidth | DAMASCS236 | 2022-08-25 | yes | yes |
| 240-960 | T-Mobile | WSHNGTNZN4 | 2022-09-01 | yes | yes |
| 240-961 | Verizon | POOLESVL | 2022-09-22 | yes | yes |
| 240-962 | Verizon | LAUREL236 | 2022-10-06 | yes | yes |
| 240-963 | Bandwidth | WSHNGTNZN3 | 2022-10-18 | yes | yes |
| 240-964 | Verizon | CUMBERLAND | 2008-05-27 | yes | yes |
| 240-965 | Windstream | WSNG236Z13 | – | yes | yes |
| 240-966 | TON80 COMMUNICATIONS, LLC | WSNGTNZN16 | 2022-02-25 | yes | yes |
| 240-967 | Verizon | CUMBERLAND | – | yes | yes |
| 240-968 | AT&T | LAUREL236 | 2022-10-21 | yes | yes |
| 240-969 | COMMIO, LLC | WALKERSVL | 2022-11-07 | yes | yes |
| 240-970 | Onvoy | WSNGTNZN12 | 2015-06-02 | yes | yes |
| 240-971 | Lumen | FREDERICK | 2016-08-02 | yes | yes |
| 240-972 | BALTIMORE-WASHINGTON TELEPHONE (BWT) | LAUREL238 | 2015-05-26 | yes | yes |
| 240-973 | T-Mobile | WSNGTNZN12 | 2022-12-01 | yes | yes |
| 240-974 | AT&T | WSNGTNZN10 | 2022-12-21 | yes | yes |
| 240-975 | Verizon | LAUREL238 | 2022-12-30 | yes | yes |
| 240-977 | Onvoy | WSHNGTNZN6 | 2023-02-22 | yes | yes |
| 240-978 | T-Mobile | ASHTON236 | 2023-01-06 | yes | yes |
| 240-979 | Lumen | CUMBERLAND | – | yes | yes |
| 240-980 | Verizon | LEONARDTN | 2023-01-09 | yes | yes |
| 240-981 | NUSO, LLC | GAITHERSBG | 2023-02-10 | yes | yes |
| 240-982 | Onvoy | GAITHERSBG | 2023-01-13 | yes | yes |
| 240-983 | NUSO, LLC | HAGERSTOWN | 2023-02-10 | yes | yes |
| 240-984 | AT&T | NEW MARKET | 2023-02-27 | yes | yes |
| 240-985 | Lumen | WILLIAMSPT | 2016-10-17 | yes | yes |
| 240-986 | Onvoy | NANJEMOY | – | yes | yes |
| 240-987 | AT&T | WSNGTNZN10 | 2023-04-05 | yes | yes |
| 240-988 | T-Mobile | WSHNGTNZN3 | – | yes | yes |
| 240-989 | AT&T | MYERSVILLE | 2023-04-20 | yes | yes |
| 240-990 | AT&T | LAUREL236 | 2023-05-03 | yes | yes |
| 240-991 | T-Mobile | ASHTON236 | 2023-05-05 | yes | yes |
| 240-992 | T-Mobile | WSNGTNZN10 | 2023-05-05 | yes | yes |
| 240-993 | Verizon | INDIANHEAD | 2001-02-13 | yes | yes |
| 240-994 | Verizon | WSNGTNZN10 | – | – | yes |
| 240-995 | Onvoy | FLINTSTONE | 2020-05-08 | yes | yes |
| 240-996 | Lumen | BRUNSWICK | 2016-10-17 | yes | yes |
| 240-997 | Verizon | WSHNGTNZN3 | – | yes | yes |
| 240-998 | Lumen | HANCOCK | 2016-10-17 | yes | yes |
Frequently asked
How many prefixes does area code 240 have?
785 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 7,850 thousand-number ranges across 63 rate centers.
What do the first three digits after 240 tell me?
They identify the block, which tells you the rate center it was allocated to and the carrier that received it. They do not tell you who serves the number today: portability moves numbers between carriers, and pooling splits a block between several of them.
Is a 240 prefix tied to a specific town?
To a rate center, which is billing geography rather than a town. NANPA abbreviates rate center names to ten characters and in large metros uses zone codes, so the name is a NANPA label, not a place name.
What does “pooled” mean in the 240 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 727 of 240's blocks are pooled, which is how regulators slowed down area code exhaustion – and why one prefix can belong to several carriers.
Source and limits
NANPA CO Code Assignment Records, all states, utilized codes, file updated 11/01/2026 – the rows where the record's Use field is “AS” (assigned). Unavailable codes are excluded. The records say who received a block and when, not who serves a particular number today.
More about this code: overview · carriers · spam complaints · local time