Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
Area code 423 prefixes
764 of the 786 possible NXX blocks are assigned in area code 423 (97.2% of capacity), spread across 75 rate centers and 55 holders. The largest holders are BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (119 blocks, 15.6%), UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN (83 blocks, 10.9%), NEW CINGULAR WIRELESS PCS, LLC - GA (80 blocks, 10.5%). Grouped by brand, AT&T accounts for 215 blocks; brand-attributable holders cover 88% 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 2026-09-28, with 37 blocks handed out in 2002 alone. 563 blocks (74%) 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. 3 assigned blocks (685, 699, 706) are not yet in service: assigned to a carrier but not open for calls, so a caller ID from one is spoofed. 153 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
764 assigned blocks of 786
75 rate centers
55 holders of record
74% in thousands-block pooling
Largest holders in 423
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | AT&T | 119 | 15.6% |
| UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | Lumen | 83 | 10.9% |
| NEW CINGULAR WIRELESS PCS, LLC - GA | AT&T | 80 | 10.5% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | Verizon | 80 | 10.5% |
| ONVOY, LLC - TN | Onvoy | 54 | 7.1% |
| LEVEL 3 COMMUNICATIONS, LLC - TN | Lumen | 38 | 5% |
| PAETEC ITEL, LLC | Windstream | 33 | 4.3% |
| BANDWIDTH.COM CLEC, LLC - TN | Bandwidth | 30 | 3.9% |
| SUNCOM DBA T-MOBILE USA | T-Mobile | 25 | 3.3% |
| POWERTEL ATLANTA LICENSES, INC. | T-Mobile | 21 | 2.7% |
| POWERTEL NASHVILLE LICENSES, INC. | T-Mobile | 18 | 2.4% |
| COMCAST IP PHONE, LLC | Comcast | 17 | 2.2% |
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.
CHATTNOOGA 183JOHNSON CY 67BRISTOL 38CLEVELAND 33KINGSPORT 32MORRISTOWN 28ATHENS 22GREENEVL 20LAFOLLETTE 16NEWPORT 15ELIZABTHTN 13MIDWAY SUL 12ROGERSVL 12BLOUNTVL 10BENTON 9CHARLESTON 9BULLS GAP 9SWEETWATER 9ERWIN 8SODDYDAISY 8DAYTON 8MADISONVL 8ONEIDA 7PIKEVILLE 7SO PITTSBG 7LIMESTONE 7SNEEDVILLE 7NEWTAZWELL 6MOUNTAINCY 6FALLBRANCH 6ETOWAH 5MIDWAY 5ENGLEWOOD 5COPPERBSIN 5BUTLER 5SPRINGCITY 5JELLICO 5BLUFF CITY 5CUMBERLDGP 5TELLICO PL 4CHURCHHILL 4DECATUR 4SURGOINSVL 4SULIVNGDNS 4MOSHEIM 4GEORGETOWN 4JASPER 4JONESBORO 4BAILEYTON 3OOLTEWAH 3FORK RIDGE 3VONORE 3HUNTSVILLE 3COLLEGEDL 3STONEY CRK 3ROAN MT 3WHITWELL 3HAMPTON 3
All 764 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 |
|---|---|---|---|---|---|
| 423-200 | Lumen | MORRISTOWN | 2002-07-18 | yes | yes |
| 423-201 | Lumen | LAFOLLETTE | 2002-07-18 | yes | yes |
| 423-202 | Verizon | JOHNSON CY | 2003-12-16 | yes | yes |
| 423-203 | Dish | CHATTNOOGA | 2022-02-03 | yes | yes |
| 423-205 | Onvoy | ETOWAH | 2016-03-09 | yes | yes |
| 423-206 | ELECTRIC POWER BOARD OF CHATTANOOGA | CHATTNOOGA | 2018-11-30 | yes | yes |
| 423-207 | Lumen | MIDWAY | – | yes | yes |
| 423-208 | AT&T | CHATTNOOGA | 2006-11-01 | yes | yes |
| 423-209 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-210 | UNITED STATES CELLULAR - TN | TELLICO PL | – | yes | yes |
| 423-212 | Lumen | BLOUNTVL | 2002-07-18 | yes | yes |
| 423-213 | T-Mobile | ELIZABTHTN | 2001-11-07 | yes | yes |
| 423-214 | UNITED STATES CELLULAR - TN | ENGLEWOOD | – | yes | yes |
| 423-215 | Verizon | ONEIDA | 2004-12-03 | – | yes |
| 423-216 | Windstream | BENTON | 2005-04-28 | yes | yes |
| 423-217 | Lumen | BRISTOL | 2002-07-18 | yes | yes |
| 423-218 | Lumen | JOHNSON CY | 2002-07-18 | yes | yes |
| 423-219 | AT&T | CHARLESTON | 2019-10-01 | yes | yes |
| 423-220 | Windstream | ERWIN | 2001-04-04 | yes | yes |
| 423-221 | Spok | CHATTNOOGA | – | – | yes |
| 423-222 | AT&T | PIKEVILLE | 2022-04-21 | yes | yes |
| 423-223 | AT&T | ONEIDA | 2006-11-30 | yes | yes |
| 423-224 | Lumen | KINGSPORT | – | – | yes |
| 423-225 | Bandwidth | BENTON | – | yes | yes |
| 423-226 | Bandwidth | CHURCHHILL | 2010-05-28 | yes | yes |
| 423-227 | T-Mobile | CHATTNOOGA | – | – | yes |
| 423-228 | Windstream | SO PITTSBG | – | yes | yes |
| 423-229 | Lumen | KINGSPORT | – | – | yes |
| 423-230 | Lumen | KINGSPORT | – | – | yes |
| 423-231 | AT&T | MORRISTOWN | – | – | yes |
| 423-232 | Lumen | JOHNSON CY | – | – | yes |
| 423-233 | PRO PAGE PARTNERS, LLC | JOHNSON CY | – | – | yes |
| 423-234 | Lumen | BAILEYTON | – | – | yes |
| 423-235 | AT&T | BULLS GAP | – | yes | yes |
| 423-236 | Brightspeed | APISON | – | yes | yes |
| 423-237 | AT&T | NEWPORT | – | yes | yes |
| 423-238 | Brightspeed | OOLTEWAH | – | – | yes |
| 423-239 | Lumen | MIDWAY SUL | – | – | yes |
| 423-240 | Verizon | CHATTNOOGA | – | – | yes |
| 423-241 | Verizon | COPPERBSIN | 2003-04-11 | yes | yes |
| 423-242 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-243 | AT&T | SODDYDAISY | – | yes | yes |
| 423-244 | AT&T | CLEVELAND | – | yes | yes |
| 423-245 | Lumen | KINGSPORT | – | – | yes |
| 423-246 | Lumen | KINGSPORT | – | – | yes |
| 423-247 | Lumen | KINGSPORT | – | – | yes |
| 423-248 | UNITED STATES CELLULAR - TN | NEWPORT | – | yes | yes |
| 423-249 | AT&T | FORK RIDGE | – | yes | yes |
| 423-250 | TWIN LAKES COMMUNICATIONS, INC. - TN | CLEVELAND | 2017-04-27 | yes | yes |
| 423-251 | T-Mobile | KINGSPORT | 2017-01-05 | yes | yes |
| 423-252 | Windstream | ATHENS | – | yes | yes |
| 423-253 | TELLICO TEL. CO., INC. | TELLICO PL | – | yes | yes |
| 423-254 | Windstream | MORRISTOWN | – | yes | yes |
| 423-255 | T-Mobile | CHATTNOOGA | – | yes | yes |
| 423-256 | Lumen | CHURCHHILL | – | yes | yes |
| 423-257 | Lumen | LIMESTONE | – | – | yes |
| 423-258 | AT&T | MORRISTOWN | – | yes | yes |
| 423-259 | UNITED STATES CELLULAR - TN | NEWTAZWELL | 2004-04-27 | yes | yes |
| 423-260 | Verizon | CHATTNOOGA | 2007-08-20 | yes | yes |
| 423-261 | TELLICO TEL. CO., INC. | COKERCREEK | – | yes | yes |
| 423-262 | Lumen | JOHNSON CY | – | yes | yes |
| 423-263 | AT&T | ETOWAH | – | – | yes |
| 423-264 | Comcast | VONORE | 2011-07-21 | yes | yes |
| 423-265 | AT&T | CHATTNOOGA | – | – | yes |
| 423-266 | AT&T | CHATTNOOGA | – | – | yes |
| 423-267 | AT&T | CHATTNOOGA | – | – | yes |
| 423-268 | AT&T | JOHNSON CY | 2012-06-08 | yes | yes |
| 423-269 | Verizon | CHATTNOOGA | 2017-01-20 | yes | yes |
| 423-270 | Verizon | ERWIN | 2013-04-24 | yes | yes |
| 423-271 | Verizon | SWEETWATER | 2011-04-14 | yes | yes |
| 423-272 | AT&T | ROGERSVL | – | – | yes |
| 423-273 | T-Mobile | MORRISTOWN | – | yes | yes |
| 423-274 | Lumen | BRISTOL | – | yes | yes |
| 423-275 | Windstream | CHATTNOOGA | 2022-06-30 | yes | yes |
| 423-276 | AT&T | KINGSPORT | – | yes | yes |
| 423-277 | T-Mobile | MORRISTOWN | 2001-08-29 | yes | yes |
| 423-278 | Lumen | GREENEVL | – | yes | yes |
| 423-279 | Lumen | BLOUNTVL | – | yes | yes |
| 423-280 | Verizon | CHATTNOOGA | – | – | yes |
| 423-281 | Charter | BUTLER | 2011-11-01 | yes | yes |
| 423-282 | Lumen | JOHNSON CY | – | – | yes |
| 423-283 | Lumen | JOHNSON CY | – | – | yes |
| 423-284 | AT&T | CLEVELAND | – | – | yes |
| 423-285 | AT&T | DAYTON | – | yes | yes |
| 423-286 | HIGHLAND TEL. COOP, INC. | ONEIDA | – | – | yes |
| 423-287 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-288 | Lumen | KINGSPORT | – | – | yes |
| 423-289 | T-Mobile | MORRISTOWN | – | yes | yes |
| 423-290 | Verizon | CHATTNOOGA | – | yes | yes |
| 423-291 | T-Mobile | MOUNTAINCY | 2001-08-31 | yes | yes |
| 423-292 | T-Mobile | FALLBRANCH | – | – | yes |
| 423-293 | T-Mobile | ROGERSVL | 2001-08-31 | yes | yes |
| 423-294 | Lumen | CHATTNOOGA | 2001-04-03 | yes | yes |
| 423-295 | TELLICO TEL. CO., INC. | BALL PLAY | – | yes | yes |
| 423-296 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-297 | Lumen | ELIZABTHTN | – | yes | yes |
| 423-298 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-299 | Lumen | BENTON | 2003-11-02 | yes | yes |
| 423-300 | Verizon | SNEEDVILLE | 2003-04-29 | yes | yes |
| 423-301 | Verizon | SO PITTSBG | 2011-11-28 | yes | yes |
| 423-302 | Bandwidth | JOHNSON CY | 2008-11-10 | yes | yes |
| 423-303 | Windstream | CLEVELAND | – | yes | yes |
| 423-304 | AT&T | CHATTNOOGA | – | – | yes |
| 423-305 | Comcast | CHATTNOOGA | 2007-02-23 | yes | yes |
| 423-306 | Verizon | MIDWAY SUL | – | – | yes |
| 423-307 | Windstream | MORRISTOWN | 2005-10-24 | yes | yes |
| 423-308 | Windstream | CHATTNOOGA | – | yes | yes |
| 423-309 | Verizon | CHATTNOOGA | – | – | yes |
| 423-310 | AT&T | CLEVELAND | 2002-10-11 | – | yes |
| 423-312 | Verizon | MORRISTOWN | – | – | yes |
| 423-313 | T-Mobile | CHATTNOOGA | 2001-05-09 | yes | yes |
| 423-314 | T-Mobile | CHATTNOOGA | – | – | yes |
| 423-315 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-316 | T-Mobile | CHATTNOOGA | – | – | yes |
| 423-317 | AT&T | MORRISTOWN | – | – | yes |
| 423-318 | AT&T | MORRISTOWN | – | yes | yes |
| 423-319 | HIGHLAND TEL. COOP, INC. | HUNTSVILLE | – | yes | yes |
| 423-320 | AT&T | CHATTNOOGA | – | – | yes |
| 423-321 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-322 | Verizon | CHATTNOOGA | – | yes | yes |
| 423-323 | Lumen | BLOUNTVL | – | – | yes |
| 423-324 | HIGHLAND TEL. COOP, INC. | PETROS | – | – | yes |
| 423-325 | Lumen | BLOUNTVL | – | yes | yes |
| 423-326 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-327 | Verizon | BULLS GAP | – | yes | yes |
| 423-328 | Comcast | JOHNSON CY | 2008-02-19 | yes | yes |
| 423-329 | AT&T | GREENEVL | 2002-03-06 | yes | yes |
| 423-330 | AT&T | ERWIN | 2002-03-06 | yes | yes |
| 423-331 | T-Mobile | CLEVELAND | – | yes | yes |
| 423-332 | AT&T | SODDYDAISY | – | – | yes |
| 423-333 | T-Mobile | ATHENS | – | yes | yes |
| 423-334 | AT&T | DECATUR | – | yes | yes |
| 423-335 | Verizon | MIDWAY SUL | – | – | yes |
| 423-336 | AT&T | CHARLESTON | – | – | yes |
| 423-337 | AT&T | SWEETWATER | – | yes | yes |
| 423-338 | AT&T | BENTON | – | – | yes |
| 423-339 | AT&T | CLEVELAND | – | yes | yes |
| 423-340 | T-Mobile | BRISTOL | – | yes | yes |
| 423-341 | Verizon | BRISTOL | – | – | yes |
| 423-342 | AT&T | ELIZABTHTN | 2002-03-06 | yes | yes |
| 423-343 | Lumen | KINGSPORT | – | yes | yes |
| 423-344 | AT&T | CHATTNOOGA | – | – | yes |
| 423-345 | AT&T | SURGOINSVL | – | yes | yes |
| 423-346 | HIGHLAND TEL. COOP, INC. | WARTBURG | – | – | yes |
| 423-347 | Bandwidth | ROGERSVL | – | yes | yes |
| 423-348 | Lumen | FALLBRANCH | – | – | yes |
| 423-349 | Lumen | SULIVNGDNS | – | yes | yes |
| 423-350 | COMMIO, LLC | BRISTOL | 2022-07-01 | yes | yes |
| 423-351 | AT&T | SWEETWATER | – | yes | yes |
| 423-352 | Windstream | LAFOLLETTE | – | yes | yes |
| 423-353 | Windstream | MORRISTOWN | 2011-03-16 | yes | yes |
| 423-354 | Lumen | BLOUNTVL | – | yes | yes |
| 423-355 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-356 | AT&T | CHATTNOOGA | 2001-02-28 | yes | yes |
| 423-357 | Lumen | CHURCHHILL | – | – | yes |
| 423-358 | T-Mobile | ROGERSVL | 2002-03-07 | yes | yes |
| 423-359 | Lumen | GREENEVL | 2002-08-13 | – | yes |
| 423-360 | Verizon | MIDWAY SUL | – | – | yes |
| 423-361 | Verizon | MIDWAY SUL | – | – | yes |
| 423-362 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-363 | T-Mobile | HUNTSVILLE | 2001-02-22 | yes | yes |
| 423-364 | AT&T | CHATTNOOGA | – | – | yes |
| 423-365 | AT&T | SPRINGCITY | – | – | yes |
| 423-366 | AT&T | BRISTOL | – | yes | yes |
| 423-367 | AT&T | KINGSPORT | – | yes | yes |
| 423-368 | Verizon | ATHENS | – | yes | yes |
| 423-369 | HIGHLAND TEL. COOP, INC. | OAKDALE | – | – | yes |
| 423-370 | Onvoy | ATHENS | – | yes | yes |
| 423-371 | T-Mobile | SWEETWATER | – | yes | yes |
| 423-372 | Lumen | JELLICO | – | yes | yes |
| 423-373 | Onvoy | BULLS GAP | – | yes | yes |
| 423-374 | Onvoy | LAFOLLETTE | – | yes | yes |
| 423-375 | AT&T | BENTON | 2010-03-18 | yes | yes |
| 423-376 | Onvoy | MADISONVL | – | yes | yes |
| 423-377 | UNITED STATES CELLULAR - TN | LAFOLLETTE | – | yes | yes |
| 423-378 | Lumen | KINGSPORT | – | – | yes |
| 423-379 | Onvoy | NEWPORT | – | yes | yes |
| 423-380 | Bandwidth | CLEVELAND | – | yes | yes |
| 423-381 | T-Mobile | ATHENS | – | yes | yes |
| 423-382 | Onvoy | SNEEDVILLE | – | yes | yes |
| 423-383 | T-Mobile | BRISTOL | 2001-11-14 | – | yes |
| 423-384 | T-Mobile | FALLBRANCH | 2001-11-14 | – | yes |
| 423-385 | Windstream | CHATTNOOGA | – | yes | yes |
| 423-386 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-387 | AT&T | BRISTOL | 2023-06-15 | yes | yes |
| 423-388 | T-Mobile | ERWIN | 2002-03-22 | yes | yes |
| 423-389 | Verizon | MIDWAY SUL | 2002-05-09 | yes | yes |
| 423-390 | Lumen | KINGSPORT | 2002-08-13 | yes | yes |
| 423-391 | Lumen | BLUFF CITY | – | yes | yes |
| 423-392 | Lumen | KINGSPORT | – | – | yes |
| 423-393 | Charter | BULLS GAP | – | yes | yes |
| 423-394 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-395 | T-Mobile | ATHENS | 2022-11-04 | yes | yes |
| 423-396 | Brightspeed | COLLEGEDL | – | yes | yes |
| 423-397 | Bandwidth | BENTON | 2017-07-06 | yes | yes |
| 423-398 | T-Mobile | KINGSPORT | 2011-03-01 | yes | yes |
| 423-399 | Bandwidth | SULIVNGDNS | 2026-02-10 | yes | yes |
| 423-400 | T-Mobile | CHATTNOOGA | – | yes | yes |
| 423-401 | Windstream | SODDYDAISY | – | yes | yes |
| 423-402 | Bandwidth | CHATTNOOGA | 2008-06-20 | yes | yes |
| 423-403 | Bandwidth | SO PITTSBG | 2017-05-01 | yes | yes |
| 423-404 | AT&T | MADISONVL | – | yes | yes |
| 423-405 | T-Mobile | ATHENS | 2011-03-29 | yes | yes |
| 423-406 | Comcast | MIDWAY SUL | 2008-03-13 | yes | yes |
| 423-407 | TWIN LAKES COMMUNICATIONS, INC. - TN | SPRINGCITY | 2020-01-10 | yes | yes |
| 423-408 | AT&T | KINGSPORT | 2009-10-29 | yes | yes |
| 423-409 | Spok | BULLS GAP | – | – | yes |
| 423-410 | Lumen | JOHNSON CY | – | – | yes |
| 423-412 | Spok | JOHNSON CY | – | – | yes |
| 423-413 | Verizon | CHATTNOOGA | – | – | yes |
| 423-414 | PEACE COMMUNICATIONS, LLC - TN | CHATTNOOGA | 2010-04-01 | yes | yes |
| 423-415 | Verizon | NEWPORT | 2010-03-11 | yes | yes |
| 423-416 | Verizon | MIDWAY SUL | – | – | yes |
| 423-417 | Verizon | CHATTNOOGA | 2017-08-23 | yes | yes |
| 423-418 | Verizon | MIDWAY SUL | – | yes | yes |
| 423-419 | Verizon | CUMBERLDGP | 2012-02-21 | yes | yes |
| 423-420 | AT&T | MADISONVL | – | yes | yes |
| 423-421 | T-Mobile | CHATTNOOGA | – | yes | yes |
| 423-422 | Lumen | MOSHEIM | – | yes | yes |
| 423-423 | Charter | LIMESTONE | 2025-10-16 | yes | yes |
| 423-424 | Windstream | CHATTNOOGA | – | yes | yes |
| 423-425 | AT&T | CHATTNOOGA | 2001-12-11 | yes | yes |
| 423-426 | Verizon | LIMESTONE | 2002-03-05 | yes | yes |
| 423-427 | Onvoy | JOHNSON CY | 2018-03-05 | yes | yes |
| 423-428 | Windstream | DAYTON | 2002-04-22 | yes | yes |
| 423-429 | AT&T | KINGSPORT | 2008-01-21 | yes | yes |
| 423-430 | NUSO, LLC | JOHNSON CY | 2013-03-11 | yes | yes |
| 423-431 | Lumen | JOHNSON CY | – | yes | yes |
| 423-432 | T-Mobile | CHATTNOOGA | – | yes | yes |
| 423-433 | Lumen | JOHNSON CY | – | yes | yes |
| 423-434 | Lumen | JOHNSON CY | – | – | yes |
| 423-435 | Lumen | ATHENS | 2002-05-02 | yes | yes |
| 423-436 | Lumen | MADISONVL | 2002-05-02 | yes | yes |
| 423-437 | Lumen | LAFOLLETTE | 2002-05-02 | yes | yes |
| 423-438 | Lumen | MORRISTOWN | 2002-05-02 | yes | yes |
| 423-439 | Lumen | JOHNSON CY | – | yes | yes |
| 423-440 | Verizon | ELIZABTHTN | 2009-10-14 | yes | yes |
| 423-441 | T-Mobile | CUMBERLDGP | 2003-01-07 | yes | yes |
| 423-442 | AT&T | MADISONVL | – | – | yes |
| 423-443 | Lumen | CHATTNOOGA | 2002-05-07 | yes | yes |
| 423-444 | Verizon | LIMESTONE | 2010-01-08 | yes | yes |
| 423-445 | AT&T | SURGOINSVL | 2002-06-25 | yes | yes |
| 423-446 | Bandwidth | FALLBRANCH | – | yes | yes |
| 423-447 | BLEDSOE TEL. COOP. | PIKEVILLE | – | – | yes |
| 423-448 | AT&T | PIKEVILLE | 2009-09-23 | – | yes |
| 423-449 | Windstream | LAFOLLETTE | 2002-06-13 | yes | yes |
| 423-450 | Comcast | MOSHEIM | 2008-10-23 | – | yes |
| 423-451 | AT&T | SODDYDAISY | – | yes | yes |
| 423-452 | AT&T | SPRINGCITY | – | yes | yes |
| 423-453 | Lumen | ATHENS | 2002-06-18 | yes | yes |
| 423-454 | Lumen | DECATUR | 2004-10-26 | yes | yes |
| 423-455 | Lumen | JELLICO | 2002-10-07 | yes | yes |
| 423-456 | Telnyx | LAFOLLETTE | – | yes | yes |
| 423-457 | Verizon | CLEVELAND | 2008-11-13 | yes | yes |
| 423-458 | AT&T | CLEVELAND | 2012-04-02 | yes | yes |
| 423-459 | AT&T | CHATTNOOGA | 2018-01-16 | yes | yes |
| 423-460 | Bandwidth | MOUNTAINCY | 2010-09-02 | yes | yes |
| 423-461 | Lumen | JOHNSON CY | – | yes | yes |
| 423-462 | TELLICO TEL. CO., INC. | RICEVILLE | – | yes | yes |
| 423-463 | AT&T | CHATTNOOGA | 2006-09-07 | yes | yes |
| 423-464 | T-Mobile | CLEVELAND | 2009-02-27 | yes | yes |
| 423-465 | AT&T | NEWPORT | 2005-07-01 | yes | yes |
| 423-466 | T-Mobile | ATHENS | 2017-10-25 | yes | yes |
| 423-467 | Lumen | MIDWAY | – | yes | yes |
| 423-468 | Onvoy | CHATTNOOGA | – | yes | yes |
| 423-469 | Spok | NEWPORT | – | – | yes |
| 423-470 | Verizon | GREENEVL | 2003-07-28 | yes | yes |
| 423-471 | AT&T | MOUNTAINCY | 2003-07-28 | yes | yes |
| 423-472 | AT&T | CLEVELAND | – | – | yes |
| 423-473 | AT&T | CLEVELAND | – | yes | yes |
| 423-474 | Lumen | STONEY CRK | – | – | yes |
| 423-475 | T-Mobile | CHATTNOOGA | 2007-11-06 | yes | yes |
| 423-476 | AT&T | CLEVELAND | – | – | yes |
| 423-477 | Lumen | MIDWAY | – | – | yes |
| 423-478 | AT&T | CLEVELAND | – | – | yes |
| 423-479 | AT&T | CLEVELAND | – | – | yes |
| 423-480 | Verizon | KINGSPORT | 2012-02-10 | yes | yes |
| 423-481 | Bandwidth | ROAN MT | 2011-09-01 | yes | yes |
| 423-482 | Lumen | BLOUNTVL | 2002-06-07 | yes | yes |
| 423-483 | Verizon | JOHNSON CY | 2002-06-07 | yes | yes |
| 423-484 | Lumen | BRISTOL | 2002-06-07 | yes | yes |
| 423-485 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-486 | Verizon | CHATTNOOGA | 2010-06-09 | yes | yes |
| 423-487 | AT&T | NEWPORT | – | yes | yes |
| 423-488 | AT&T | CHATTNOOGA | – | – | yes |
| 423-489 | AT&T | CUMBERLDGP | 2004-11-02 | yes | yes |
| 423-490 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-491 | Lumen | JOHNSON CY | 2013-06-21 | yes | yes |
| 423-492 | AT&T | MORRISTOWN | 2011-04-07 | yes | yes |
| 423-493 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-494 | Verizon | LAFOLLETTE | 2003-02-04 | – | yes |
| 423-495 | AT&T | CHATTNOOGA | – | – | yes |
| 423-496 | AT&T | COPPERBSIN | – | – | yes |
| 423-497 | T-Mobile | CHATTNOOGA | 2017-02-03 | yes | yes |
| 423-498 | ELECTRIC POWER BOARD OF CHATTANOOGA | CHATTNOOGA | 2017-02-01 | yes | yes |
| 423-499 | AT&T | CHATTNOOGA | – | – | yes |
| 423-500 | Onvoy | ROGERSVL | – | yes | yes |
| 423-501 | SKYBEST COMMUNICATIONS, INC. - TN | MOUNTAINCY | 2017-10-25 | yes | yes |
| 423-502 | Verizon | MIDWAY SUL | – | – | yes |
| 423-503 | T-Mobile | CHATTNOOGA | – | yes | yes |
| 423-504 | T-Mobile | CHATTNOOGA | – | yes | yes |
| 423-505 | T-Mobile | CHATTNOOGA | – | yes | yes |
| 423-506 | Verizon | ATHENS | – | yes | yes |
| 423-507 | AT&T | ATHENS | – | yes | yes |
| 423-508 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-509 | Onvoy | CHATTNOOGA | 2008-10-24 | yes | yes |
| 423-510 | AT&T | CHATTNOOGA | – | – | yes |
| 423-512 | Verizon | STONEY CRK | 2003-08-04 | yes | yes |
| 423-513 | AT&T | VONORE | 2022-11-08 | yes | yes |
| 423-514 | Spok | CHATTNOOGA | – | – | yes |
| 423-515 | Onvoy | SO PITTSBG | 2019-10-01 | yes | yes |
| 423-516 | Lumen | SULIVNGDNS | 2012-02-21 | yes | yes |
| 423-517 | AT&T | CHATTNOOGA | – | – | yes |
| 423-518 | T-Mobile | ELIZABTHTN | 2012-05-24 | yes | yes |
| 423-519 | UNITED STATES CELLULAR - TN | TELLICO PL | – | yes | yes |
| 423-520 | Windstream | MADISONVL | – | yes | yes |
| 423-521 | T-Mobile | CHATTNOOGA | 2008-06-10 | yes | yes |
| 423-522 | AT&T | MORRISTOWN | 2002-12-05 | yes | yes |
| 423-523 | Verizon | BULLS GAP | 2002-05-09 | yes | yes |
| 423-524 | NUSO, LLC | JOHNSON CY | 2018-02-06 | yes | yes |
| 423-525 | Lumen | GREENEVL | 2008-05-14 | yes | yes |
| 423-526 | Brightspeed | NEWTAZWELL | – | yes | yes |
| 423-527 | COMMIO, LLC | SODDYDAISY | 2022-11-09 | yes | yes |
| 423-528 | Bandwidth | BAILEYTON | – | yes | yes |
| 423-529 | Windstream | GEORGETOWN | 2006-04-17 | yes | yes |
| 423-530 | T-Mobile | KINGSPORT | 2012-03-15 | yes | yes |
| 423-531 | ELECTRIC POWER BOARD OF CHATTANOOGA | CHATTNOOGA | 2008-09-16 | yes | yes |
| 423-532 | Windstream | NEWPORT | – | yes | yes |
| 423-533 | BLEDSOE TEL. COOP. | NINE MILE | – | – | yes |
| 423-534 | Verizon | BRISTOL | – | – | yes |
| 423-535 | Verizon | CHATTNOOGA | 2003-07-09 | yes | yes |
| 423-536 | Windstream | SWEETWATER | – | yes | yes |
| 423-537 | Windstream | BULLS GAP | – | yes | yes |
| 423-538 | Lumen | BLUFF CITY | – | – | yes |
| 423-539 | AT&T | ONEIDA | – | yes | yes |
| 423-540 | Onvoy | NEWPORT | – | yes | yes |
| 423-541 | Vonage | CHATTNOOGA | 2018-03-20 | yes | yes |
| 423-542 | Lumen | ELIZABTHTN | – | – | yes |
| 423-543 | Lumen | ELIZABTHTN | – | – | yes |
| 423-544 | T-Mobile | CHATTNOOGA | 2001-09-14 | yes | yes |
| 423-545 | Lumen | MADISONVL | 2002-08-20 | yes | yes |
| 423-546 | Lumen | BULLS GAP | 2002-08-20 | yes | yes |
| 423-547 | Lumen | ELIZABTHTN | – | – | yes |
| 423-548 | ETC COMMUNICATIONS, L.L.C. - TN | COPPERBSIN | 2005-07-11 | – | yes |
| 423-549 | Vonage | JOHNSON CY | 2018-03-23 | yes | yes |
| 423-550 | Bandwidth | MIDWAY | 2023-01-25 | yes | yes |
| 423-551 | Lumen | CHATTNOOGA | 2014-02-27 | yes | yes |
| 423-552 | Verizon | GREENEVL | – | yes | yes |
| 423-553 | AT&T | CHATTNOOGA | – | – | yes |
| 423-554 | BLEDSOE TEL. COOP. | COLLEGESTA | – | – | yes |
| 423-556 | Bandwidth | SODDYDAISY | 2018-08-30 | yes | yes |
| 423-557 | T-Mobile | JOHNSON CY | 2004-09-29 | yes | yes |
| 423-558 | Onvoy | CHATTNOOGA | – | yes | yes |
| 423-559 | AT&T | CLEVELAND | – | – | yes |
| 423-560 | Onvoy | ERWIN | 2018-08-16 | yes | yes |
| 423-561 | Onvoy | SWEETWATER | – | yes | yes |
| 423-562 | AT&T | LAFOLLETTE | – | – | yes |
| 423-563 | AT&T | LAFOLLETTE | – | yes | yes |
| 423-564 | Verizon | ROGERSVL | 2018-05-25 | yes | yes |
| 423-565 | Bandwidth | DECATUR | 2018-08-30 | yes | yes |
| 423-566 | AT&T | LAFOLLETTE | – | – | yes |
| 423-567 | AT&T | DAYTON | 2008-11-26 | yes | yes |
| 423-568 | TELLICO TEL. CO., INC. | NIOTA | – | yes | yes |
| 423-569 | HIGHLAND TEL. COOP, INC. | ONEIDA | – | – | yes |
| 423-570 | AT&T | DAYTON | – | yes | yes |
| 423-571 | Verizon | MIDWAY SUL | – | – | yes |
| 423-572 | UNITED STATES CELLULAR - TN | ENGLEWOOD | – | yes | yes |
| 423-573 | BRISTOL TENNESSEE ESSENTIAL SERVICES - TN | BRISTOL | 2006-07-07 | – | yes |
| 423-574 | BRISTOL TENNESSEE ESSENTIAL SERVICES - TN | BLOUNTVL | 2006-07-07 | – | yes |
| 423-575 | BRISTOL TENNESSEE ESSENTIAL SERVICES - TN | BLUFF CITY | 2006-07-07 | – | yes |
| 423-576 | AT&T | ELIZABTHTN | 2023-06-15 | yes | yes |
| 423-577 | AT&T | ONEIDA | – | yes | yes |
| 423-578 | Lumen | KINGSPORT | – | yes | yes |
| 423-579 | MOUNTAINET TELEPHONE COMPANY - VA | KINGSPORT | 2009-02-13 | yes | yes |
| 423-580 | AT&T | CHATTNOOGA | – | – | yes |
| 423-581 | AT&T | MORRISTOWN | – | – | yes |
| 423-582 | AT&T | CHATTNOOGA | 2009-08-10 | yes | yes |
| 423-583 | Bandwidth | SULIVNGDNS | 2018-09-26 | yes | yes |
| 423-584 | AT&T | CLEVELAND | – | yes | yes |
| 423-585 | AT&T | MORRISTOWN | – | yes | yes |
| 423-586 | AT&T | MORRISTOWN | – | – | yes |
| 423-587 | AT&T | MORRISTOWN | – | – | yes |
| 423-588 | Verizon | GREENEVL | 2010-01-07 | yes | yes |
| 423-589 | AT&T | GEORGETOWN | 2019-04-09 | yes | yes |
| 423-590 | Bandwidth | SO PITTSBG | 2019-05-03 | yes | yes |
| 423-591 | Onvoy | CHATTNOOGA | 2008-01-03 | yes | yes |
| 423-592 | UNITED STATES CELLULAR - TN | LAFOLLETTE | – | yes | yes |
| 423-593 | T-Mobile | CHATTNOOGA | – | yes | yes |
| 423-594 | Onvoy | DAYTON | 2009-09-16 | yes | yes |
| 423-595 | T-Mobile | CHATTNOOGA | 2001-04-12 | yes | yes |
| 423-596 | AT&T | CHATTNOOGA | – | – | yes |
| 423-597 | Bandwidth | BENTON | 2019-05-22 | yes | yes |
| 423-598 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-599 | Verizon | CLEVELAND | 2010-01-07 | yes | yes |
| 423-600 | Comcast | APISON | 2007-03-19 | yes | yes |
| 423-601 | AT&T | BULLS GAP | 2005-02-03 | yes | yes |
| 423-602 | NUSO, LLC | CHATTNOOGA | 2012-06-08 | yes | yes |
| 423-603 | AT&T | FORK RIDGE | 2013-12-13 | yes | yes |
| 423-604 | Onvoy | ETOWAH | – | yes | yes |
| 423-605 | Verizon | CHATTNOOGA | – | – | yes |
| 423-606 | Comcast | ENGLEWOOD | 2007-02-26 | yes | yes |
| 423-607 | Verizon | LIMESTONE | 2014-02-17 | yes | yes |
| 423-608 | Verizon | NEWPORT | – | – | yes |
| 423-609 | Verizon | GREENEVL | 2014-08-12 | yes | yes |
| 423-610 | Lumen | JOHNSON CY | – | – | yes |
| 423-612 | Verizon | BRISTOL | – | – | yes |
| 423-613 | AT&T | NEWPORT | – | yes | yes |
| 423-614 | AT&T | CLEVELAND | – | – | yes |
| 423-615 | Comcast | COLLEGEDL | 2007-03-19 | yes | yes |
| 423-616 | Onvoy | MORRISTOWN | 2014-08-18 | yes | yes |
| 423-617 | T-Mobile | ATHENS | 2013-10-07 | yes | yes |
| 423-618 | Verizon | CHATTNOOGA | – | – | yes |
| 423-619 | Verizon | CHATTNOOGA | – | – | yes |
| 423-620 | Verizon | GREENEVL | – | yes | yes |
| 423-621 | Verizon | MORRISTOWN | – | yes | yes |
| 423-622 | AT&T | CHATTNOOGA | – | – | yes |
| 423-623 | AT&T | NEWPORT | – | – | yes |
| 423-624 | AT&T | CHATTNOOGA | – | – | yes |
| 423-625 | AT&T | NEWPORT | – | – | yes |
| 423-626 | Brightspeed | NEWTAZWELL | – | – | yes |
| 423-627 | HIGHLAND TEL. COOP, INC. | ROBBINS | – | yes | yes |
| 423-628 | HIGHLAND TEL. COOP, INC. | SUNBRIGHT | – | – | yes |
| 423-629 | AT&T | CHATTNOOGA | – | – | yes |
| 423-630 | TELESCAN, INC. - TN | JOHNSON CY | 2007-09-25 | – | yes |
| 423-631 | Charter | JOHNSON CY | 2008-04-08 | yes | yes |
| 423-632 | TWIN LAKES COMMUNICATIONS, INC. - TN | WARTBURG | 2019-06-24 | yes | yes |
| 423-633 | Telnyx | CHATTNOOGA | 2019-12-17 | yes | yes |
| 423-634 | AT&T | CHATTNOOGA | – | – | yes |
| 423-635 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-636 | Lumen | GREENEVL | – | – | yes |
| 423-637 | Verizon | CHATTNOOGA | 2008-06-09 | yes | yes |
| 423-638 | Lumen | GREENEVL | – | – | yes |
| 423-639 | Lumen | GREENEVL | – | – | yes |
| 423-640 | AT&T | SNEEDVILLE | 2020-03-27 | yes | yes |
| 423-641 | Bandwidth | CLEVELAND | 2014-04-07 | yes | yes |
| 423-642 | AT&T | CHATTNOOGA | – | – | yes |
| 423-643 | ELECTRIC POWER BOARD OF CHATTANOOGA | CHATTNOOGA | 2002-08-14 | – | yes |
| 423-644 | AT&T | SODDYDAISY | 2020-03-09 | yes | yes |
| 423-645 | AT&T | CHATTNOOGA | – | – | yes |
| 423-646 | T-Mobile | BRISTOL | – | yes | yes |
| 423-647 | T-Mobile | BUTLER | – | yes | yes |
| 423-648 | ELECTRIC POWER BOARD OF CHATTANOOGA | CHATTNOOGA | – | – | yes |
| 423-649 | AT&T | ATHENS | – | yes | yes |
| 423-650 | Verizon | CLEVELAND | – | yes | yes |
| 423-651 | Telnyx | JASPER | – | yes | yes |
| 423-652 | Lumen | BRISTOL | – | yes | yes |
| 423-653 | AT&T | CHATTNOOGA | – | – | yes |
| 423-654 | CSC WIRELESS, LLC | CHATTNOOGA | 2020-07-21 | yes | yes |
| 423-655 | Spok | CHATTNOOGA | – | – | yes |
| 423-656 | CSC WIRELESS, LLC | JOHNSON CY | 2020-07-22 | yes | yes |
| 423-657 | Bandwidth | MOSHEIM | 2015-01-28 | yes | yes |
| 423-658 | AT&T | WHITWELL | – | yes | yes |
| 423-659 | AT&T | COPPERBSIN | 2020-08-04 | yes | yes |
| 423-660 | Twilio | CHATTNOOGA | 2020-09-16 | yes | yes |
| 423-661 | Verizon | CHATTNOOGA | 2014-08-12 | yes | yes |
| 423-662 | Onvoy | BLOUNTVL | – | yes | yes |
| 423-663 | HIGHLAND TEL. COOP, INC. | HUNTSVILLE | – | yes | yes |
| 423-664 | Lumen | CHATTNOOGA | – | yes | yes |
| 423-665 | Lumen | CHARLESTON | 2004-10-26 | yes | yes |
| 423-666 | Onvoy | ELIZABTHTN | 2018-05-17 | yes | yes |
| 423-667 | Verizon | CHATTNOOGA | – | – | yes |
| 423-668 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-669 | Onvoy | BENTON | 2023-08-11 | yes | yes |
| 423-670 | IP HORIZON LLC | JOHNSON CY | 2020-09-23 | yes | yes |
| 423-671 | IP HORIZON LLC | CHATTNOOGA | 2020-09-29 | yes | yes |
| 423-672 | Telnyx | JOHNSON CY | 2019-12-27 | yes | yes |
| 423-673 | Windstream | JOHNSON CY | 2021-04-13 | yes | yes |
| 423-674 | Onvoy | DAYTON | 2021-04-13 | yes | yes |
| 423-675 | Onvoy | JASPER | 2021-04-13 | yes | yes |
| 423-676 | T-Mobile | JOHNSON CY | – | yes | yes |
| 423-677 | T-Mobile | FALLBRANCH | – | yes | yes |
| 423-678 | Onvoy | ROAN MT | 2021-04-15 | yes | yes |
| 423-679 | Onvoy | OOLTEWAH | 2021-04-13 | yes | yes |
| 423-680 | Verizon | CHATTNOOGA | 2016-03-30 | yes | yes |
| 423-681 | Verizon | CHATTNOOGA | 2015-01-14 | yes | yes |
| 423-682 | Verizon | CHATTNOOGA | 2016-01-14 | yes | yes |
| 423-683 | AT&T | PIKEVILLE | 2026-03-12 | yes | yes |
| 423-684 | Bandwidth | KINGSPORT | 2026-04-23 | yes | yes |
| 423-685 | AT&T | BRISTOL | 2026-06-18 | yes | no |
| 423-686 | Onvoy | FORK RIDGE | 2021-04-15 | yes | yes |
| 423-687 | AT&T | PIKEVILLE | 2021-05-13 | yes | yes |
| 423-688 | Telnyx | SNEEDVILLE | 2021-05-17 | yes | yes |
| 423-689 | Bandwidth | BRISTOL | 2021-07-01 | yes | yes |
| 423-690 | Telnyx | MORRISTOWN | 2016-12-02 | yes | yes |
| 423-691 | Onvoy | ATHENS | 2021-09-01 | yes | yes |
| 423-692 | SKYBEST COMMUNICATIONS, INC. - TN | BUTLER | 2021-09-01 | yes | yes |
| 423-693 | Lumen | CHATTNOOGA | 2006-05-19 | yes | yes |
| 423-694 | T-Mobile | SWEETWATER | 2021-09-08 | yes | yes |
| 423-695 | AT&T | BRISTOL | 2026-06-18 | yes | yes |
| 423-696 | T-Mobile | ROGERSVL | 2021-09-16 | yes | yes |
| 423-697 | AT&T | CHATTNOOGA | – | – | yes |
| 423-698 | AT&T | CHATTNOOGA | – | – | yes |
| 423-699 | Verizon | CLEVELAND | 2026-09-02 | yes | no |
| 423-701 | UNITED STATES CELLULAR - TN | ROBBINS | 2014-01-30 | yes | yes |
| 423-702 | Lumen | CHATTNOOGA | 2006-02-14 | yes | yes |
| 423-703 | Onvoy | COKERCREEK | 2019-11-21 | yes | yes |
| 423-704 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-705 | NUSO, LLC | JOHNSON CY | 2021-12-02 | yes | yes |
| 423-706 | AT&T | BRISTOL | 2026-09-28 | yes | no |
| 423-707 | AT&T | ELIZABTHTN | 2009-12-11 | yes | yes |
| 423-708 | T-Mobile | CHATTNOOGA | 2014-10-08 | yes | yes |
| 423-709 | Windstream | CLEVELAND | – | yes | yes |
| 423-710 | Comcast | CHATTNOOGA | 2007-06-19 | yes | yes |
| 423-712 | Bandwidth | BLUFF CITY | 2015-01-26 | yes | yes |
| 423-713 | Comcast | CHATTNOOGA | 2015-06-05 | yes | yes |
| 423-714 | Windstream | MORRISTOWN | – | yes | yes |
| 423-715 | Verizon | CLEVELAND | – | yes | yes |
| 423-716 | Windstream | CLEVELAND | – | yes | yes |
| 423-717 | T-Mobile | ATHENS | 2015-04-29 | yes | yes |
| 423-718 | Verizon | CHATTNOOGA | – | – | yes |
| 423-719 | NUSO, LLC | CHATTNOOGA | 2021-12-02 | yes | yes |
| 423-720 | Bandwidth | NEWPORT | 2015-05-20 | yes | yes |
| 423-721 | UNITED STATES CELLULAR - TN | NEWPORT | – | yes | yes |
| 423-722 | Lumen | JOHNSON CY | – | yes | yes |
| 423-723 | Lumen | KINGSPORT | – | yes | yes |
| 423-724 | Windstream | SNEEDVILLE | – | yes | yes |
| 423-725 | Lumen | HAMPTON | – | – | yes |
| 423-726 | Verizon | MIDWAY SUL | – | yes | yes |
| 423-727 | Lumen | MOUNTAINCY | – | – | yes |
| 423-728 | AT&T | CLEVELAND | – | yes | yes |
| 423-729 | Charter | FLCRKFALLS | 2024-06-25 | yes | yes |
| 423-730 | Comcast | RICEVILLE | 2007-02-26 | yes | yes |
| 423-731 | Charter | NEWTAZWELL | 2025-11-18 | yes | yes |
| 423-732 | Verizon | KINGSPORT | 2015-08-11 | yes | yes |
| 423-733 | AT&T | SNEEDVILLE | – | yes | yes |
| 423-734 | Onvoy | ROGERSVL | 2020-01-09 | yes | yes |
| 423-735 | Lumen | ERWIN | – | yes | yes |
| 423-736 | Verizon | MORRISTOWN | – | yes | yes |
| 423-737 | AT&T | JOHNSON CY | – | – | yes |
| 423-738 | AT&T | BRISTOL | 2021-12-14 | yes | yes |
| 423-739 | SKYLINE TEL. MEMBERSHIP CORP. | SHADY VLY | – | – | yes |
| 423-740 | Verizon | CLEVELAND | 2021-12-15 | yes | yes |
| 423-741 | AT&T | JOHNSON CY | – | – | yes |
| 423-742 | Verizon | BRISTOL | – | yes | yes |
| 423-743 | Lumen | ERWIN | – | – | yes |
| 423-744 | AT&T | ATHENS | – | yes | yes |
| 423-745 | AT&T | ATHENS | – | – | yes |
| 423-746 | AT&T | ATHENS | – | yes | yes |
| 423-747 | AT&T | JOHNSON CY | – | – | yes |
| 423-748 | AT&T | MORRISTOWN | – | – | yes |
| 423-749 | T-Mobile | COLLEGEDL | 2021-12-29 | yes | yes |
| 423-750 | SKYE TELECOM LLC DBA SKYETEL | CHATTNOOGA | 2021-09-03 | yes | yes |
| 423-751 | AT&T | CHATTNOOGA | – | – | yes |
| 423-752 | AT&T | CHATTNOOGA | – | – | yes |
| 423-753 | Lumen | JONESBORO | – | – | yes |
| 423-754 | Verizon | ROGERSVL | – | yes | yes |
| 423-755 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-756 | AT&T | CHATTNOOGA | – | – | yes |
| 423-757 | AT&T | CHATTNOOGA | – | – | yes |
| 423-758 | Windstream | BRISTOL | – | yes | yes |
| 423-759 | Onvoy | MORRISTOWN | 2021-09-01 | yes | yes |
| 423-760 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-761 | Lumen | COPPERBSIN | 2006-08-01 | yes | yes |
| 423-762 | Verizon | CHATTNOOGA | – | yes | yes |
| 423-763 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-764 | Lumen | BRISTOL | – | – | yes |
| 423-765 | Charter | KINGSPORT | 2004-12-02 | yes | yes |
| 423-766 | Onvoy | LIMESTONE | 2021-01-20 | yes | yes |
| 423-767 | AT&T | JOHNSON CY | 2001-01-09 | yes | yes |
| 423-768 | Lumen | BUTLER | – | – | yes |
| 423-769 | Bandwidth | BENTON | 2021-12-15 | yes | yes |
| 423-770 | Onvoy | CHURCHHILL | 2018-08-16 | yes | yes |
| 423-771 | AT&T | CHATTNOOGA | 2010-01-06 | yes | yes |
| 423-772 | Lumen | ROAN MT | – | – | yes |
| 423-773 | T-Mobile | JOHNSON CY | 2001-02-09 | – | yes |
| 423-774 | AT&T | SODDYDAISY | – | yes | yes |
| 423-775 | AT&T | DAYTON | – | – | yes |
| 423-776 | AT&T | PIKEVILLE | 2021-12-30 | yes | yes |
| 423-777 | Onvoy | CHATTNOOGA | 2014-10-06 | yes | yes |
| 423-778 | AT&T | CHATTNOOGA | – | – | yes |
| 423-779 | Windstream | CHATTNOOGA | – | yes | yes |
| 423-780 | AT&T | CHARLESTON | – | yes | yes |
| 423-781 | Lumen | ETOWAH | 2004-03-01 | yes | yes |
| 423-782 | Windstream | KINGSPORT | – | yes | yes |
| 423-783 | Lumen | GREENEVL | – | – | yes |
| 423-784 | AT&T | JELLICO | – | – | yes |
| 423-785 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-786 | Onvoy | BLUFF CITY | 2023-08-11 | yes | yes |
| 423-787 | Lumen | GREENEVL | – | – | yes |
| 423-788 | Lumen | JONESBORO | – | yes | yes |
| 423-789 | Lumen | BRISTOL | 2002-08-13 | yes | yes |
| 423-790 | Charter | CLEVELAND | 2006-04-12 | yes | yes |
| 423-791 | T-Mobile | JOHNSON CY | – | yes | yes |
| 423-792 | Dish | OAKDALE | 2024-02-21 | yes | yes |
| 423-793 | Lumen | BRISTOL | – | yes | yes |
| 423-794 | Windstream | JOHNSON CY | – | yes | yes |
| 423-795 | Spok | JOHNSON CY | – | – | yes |
| 423-796 | Dish | JOHNSON CY | 2022-02-01 | yes | yes |
| 423-797 | Verizon | BRISTOL | – | yes | yes |
| 423-798 | Lumen | GREENEVL | – | – | yes |
| 423-799 | Lumen | SPRINGCITY | 2004-10-26 | yes | yes |
| 423-800 | AT&T | CHATTNOOGA | 2011-02-10 | yes | yes |
| 423-801 | UNITED STATES CELLULAR - TN | CUMBERLDGP | 2007-12-19 | yes | yes |
| 423-802 | Verizon | CHATTNOOGA | – | – | yes |
| 423-803 | ELECTRIC POWER BOARD OF CHATTANOOGA | CHATTNOOGA | 2016-01-04 | yes | yes |
| 423-804 | Bandwidth | BRISTOL | 2022-02-03 | yes | yes |
| 423-805 | Onvoy | CHATTNOOGA | – | yes | yes |
| 423-806 | Bandwidth | MIDWAY | 2015-05-20 | yes | yes |
| 423-807 | AT&T | MADISONVL | – | yes | yes |
| 423-808 | Comcast | TELLICO PL | 2007-09-14 | yes | yes |
| 423-809 | Lumen | PIKEVILLE | 2023-05-18 | yes | yes |
| 423-810 | AT&T | CHARLESTON | 2015-08-03 | yes | yes |
| 423-812 | Bandwidth | GREENEVL | 2016-08-23 | yes | yes |
| 423-813 | Verizon | CLEVELAND | 2015-10-08 | yes | yes |
| 423-814 | Telnyx | SWEETWATER | – | yes | yes |
| 423-815 | Comcast | WHITWELL | 2007-09-14 | yes | yes |
| 423-816 | AT&T | BRISTOL | 2022-12-01 | yes | yes |
| 423-817 | T-Mobile | KINGSPORT | – | yes | yes |
| 423-818 | Onvoy | JELLICO | 2016-09-21 | yes | yes |
| 423-819 | NUSO, LLC | CLEVELAND | – | yes | yes |
| 423-820 | Onvoy | GREENEVL | 2018-05-17 | yes | yes |
| 423-821 | AT&T | CHATTNOOGA | – | – | yes |
| 423-822 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-823 | T-Mobile | GREENEVL | – | yes | yes |
| 423-824 | Onvoy | ERWIN | 2023-08-11 | yes | yes |
| 423-825 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-826 | Windstream | CHATTNOOGA | – | yes | yes |
| 423-827 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-829 | AT&T | CHARLESTON | – | yes | yes |
| 423-830 | Onvoy | KINGSPORT | 2018-05-17 | yes | yes |
| 423-831 | NUSO, LLC | GREENEVL | 2023-03-02 | yes | yes |
| 423-832 | TON80 COMMUNICATIONS, LLC | CLINCHPORT | 2022-01-13 | yes | yes |
| 423-833 | T-Mobile | JOHNSON CY | – | yes | yes |
| 423-834 | Lumen | CHATTNOOGA | – | yes | yes |
| 423-835 | AT&T | BRISTOL | 2023-03-16 | yes | yes |
| 423-836 | Verizon | SWEETWATER | – | yes | yes |
| 423-837 | AT&T | SO PITTSBG | – | – | yes |
| 423-838 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-839 | Charter | MORRISTOWN | – | yes | yes |
| 423-840 | Onvoy | BUTLER | 2018-05-17 | yes | yes |
| 423-841 | T-Mobile | MOUNTAINCY | 2023-04-06 | yes | yes |
| 423-842 | AT&T | CHATTNOOGA | – | – | yes |
| 423-843 | AT&T | CHATTNOOGA | – | – | yes |
| 423-844 | Lumen | BRISTOL | – | yes | yes |
| 423-845 | Verizon | BRISTOL | 2005-03-30 | yes | yes |
| 423-846 | AT&T | CHATTNOOGA | – | – | yes |
| 423-847 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-848 | SKYE TELECOM LLC DBA SKYETEL | JOHNSON CY | 2021-09-03 | yes | yes |
| 423-849 | AT&T | JOHNSON CY | 2023-05-05 | yes | yes |
| 423-850 | Onvoy | JONESBORO | 2018-05-21 | yes | yes |
| 423-851 | Brightspeed | NEWTAZWELL | – | – | yes |
| 423-852 | Lumen | DUNLAP | 2023-05-18 | yes | yes |
| 423-853 | Twilio | JOHNSON CY | 2022-01-21 | yes | yes |
| 423-854 | Lumen | JOHNSON CY | – | – | yes |
| 423-855 | AT&T | CHATTNOOGA | – | – | yes |
| 423-856 | T-Mobile | ATHENS | 2016-09-16 | yes | yes |
| 423-857 | Lumen | KINGSPORT | – | – | yes |
| 423-858 | Onvoy | BLOUNTVL | 2023-08-11 | yes | yes |
| 423-859 | Onvoy | ROGERSVL | 2023-05-31 | yes | yes |
| 423-860 | COMMIO, LLC | CHATTNOOGA | 2022-07-01 | yes | yes |
| 423-862 | Onvoy | SPRINGCITY | 2023-08-22 | yes | yes |
| 423-863 | Verizon | KINGSPORT | – | yes | yes |
| 423-864 | Charter | DECATUR | 2023-05-18 | yes | yes |
| 423-866 | Comcast | NIOTA | 2023-08-07 | yes | yes |
| 423-867 | AT&T | CHATTNOOGA | – | – | yes |
| 423-868 | Onvoy | MOSHEIM | 2023-08-22 | yes | yes |
| 423-869 | AT&T | CUMBERLDGP | – | yes | yes |
| 423-870 | AT&T | CHATTNOOGA | – | – | yes |
| 423-871 | AT&T | LAFOLLETTE | – | yes | yes |
| 423-872 | TERRA NOVA TELECOM INC. | CHATTNOOGA | 2023-05-23 | yes | yes |
| 423-873 | FRACTEL, LLC | STONEY CRK | 2020-07-15 | yes | yes |
| 423-874 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-875 | AT&T | CHATTNOOGA | – | – | yes |
| 423-876 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-877 | AT&T | CHATTNOOGA | – | – | yes |
| 423-878 | Lumen | BRISTOL | – | – | yes |
| 423-879 | Onvoy | GEORGETOWN | 2023-08-22 | yes | yes |
| 423-880 | Onvoy | JOHNSON CY | 2021-03-31 | yes | yes |
| 423-881 | BLEDSOE TEL. COOP. | FLCRKFALLS | – | – | yes |
| 423-882 | AT&T | CHATTNOOGA | 2011-10-26 | yes | yes |
| 423-883 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-884 | TELLICO TEL. CO., INC. | VONORE | – | – | yes |
| 423-885 | Onvoy | ENGLEWOOD | – | yes | yes |
| 423-886 | AT&T | CHATTNOOGA | – | – | yes |
| 423-887 | TELLICO TEL. CO., INC. | ENGLEWOOD | – | yes | yes |
| 423-888 | Onvoy | CHATTNOOGA | 2015-08-17 | yes | yes |
| 423-889 | T-Mobile | CLEVELAND | 2023-08-30 | yes | yes |
| 423-890 | AT&T | BRISTOL | 2023-09-06 | yes | yes |
| 423-892 | AT&T | CHATTNOOGA | – | – | yes |
| 423-893 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-894 | AT&T | CHATTNOOGA | – | – | yes |
| 423-895 | T-Mobile | ELIZABTHTN | – | yes | yes |
| 423-896 | Lumen | HAMPTON | – | yes | yes |
| 423-897 | Lumen | FALLBRANCH | – | yes | yes |
| 423-898 | T-Mobile | CHARLESTON | 2023-10-12 | yes | yes |
| 423-899 | AT&T | CHATTNOOGA | – | – | yes |
| 423-900 | Onvoy | JOHNSON CY | 2011-02-16 | yes | yes |
| 423-902 | AT&T | CHATTNOOGA | – | – | yes |
| 423-903 | AT&T | CHATTNOOGA | – | – | yes |
| 423-904 | Charter | CHATTNOOGA | 2021-04-13 | yes | yes |
| 423-905 | Charter | JOHNSON CY | 2021-04-13 | yes | yes |
| 423-906 | CALLWORKS CORPORATION | JOHNSON CY | 2023-10-24 | yes | yes |
| 423-907 | AT&T | LAFOLLETTE | – | yes | yes |
| 423-908 | COMMIO, LLC | SURGOINSVL | 2024-01-09 | yes | yes |
| 423-909 | Charter | SO PITTSBG | 2023-05-18 | yes | yes |
| 423-910 | Comcast | OOLTEWAH | 2007-03-19 | yes | yes |
| 423-912 | AT&T | LAFOLLETTE | – | yes | yes |
| 423-913 | Lumen | JONESBORO | – | yes | yes |
| 423-914 | Verizon | BRISTOL | – | – | yes |
| 423-915 | Lumen | JOHNSON CY | – | yes | yes |
| 423-917 | Lumen | BLOUNTVL | – | – | yes |
| 423-918 | AT&T | ONEIDA | 2024-12-12 | yes | yes |
| 423-919 | Onvoy | NEWTAZWELL | 2019-10-01 | yes | yes |
| 423-920 | AT&T | ATHENS | – | yes | yes |
| 423-921 | AT&T | ROGERSVL | – | yes | yes |
| 423-922 | FRACTEL, LLC | BAILEYTON | 2020-07-15 | yes | yes |
| 423-923 | AT&T | ROGERSVL | – | yes | yes |
| 423-924 | Peerless | JOHNSON CY | 2025-03-10 | yes | yes |
| 423-925 | TON80 COMMUNICATIONS, LLC | LAFOLLETTE | 2022-03-23 | yes | yes |
| 423-926 | Lumen | JOHNSON CY | – | – | yes |
| 423-927 | TON80 COMMUNICATIONS, LLC | MORRISTOWN | 2022-03-01 | yes | yes |
| 423-928 | Lumen | JOHNSON CY | – | – | yes |
| 423-929 | Lumen | JOHNSON CY | – | – | yes |
| 423-930 | MOUNTAINET TELEPHONE COMPANY - VA | JOHNSON CY | 2009-02-13 | yes | yes |
| 423-932 | TON80 COMMUNICATIONS, LLC | ETOWAH | 2022-01-20 | yes | yes |
| 423-933 | Windstream | CHATTNOOGA | 2002-06-14 | yes | yes |
| 423-934 | TON80 COMMUNICATIONS, LLC | SURGOINSVL | 2021-03-18 | yes | yes |
| 423-936 | Comcast | SUNBRIGHT | 2024-05-14 | yes | yes |
| 423-938 | Lumen | JOHNSON CY | 2002-08-13 | – | yes |
| 423-939 | Windstream | JASPER | 2005-06-21 | yes | yes |
| 423-940 | COMMIO, LLC | DAYTON | 2023-03-20 | yes | yes |
| 423-941 | Comcast | DEER LODGE | 2024-05-14 | yes | yes |
| 423-942 | AT&T | JASPER | – | – | yes |
| 423-943 | T-Mobile | JOHNSON CY | – | yes | yes |
| 423-944 | SCOTT COUNTY TEL. COOP., INC. | CLINCHPORT | – | – | yes |
| 423-945 | Charter | COLLEGESTA | 2025-06-26 | yes | yes |
| 423-946 | T-Mobile | JOHNSON CY | 2001-03-09 | yes | yes |
| 423-948 | T-Mobile | LIMESTONE | – | yes | yes |
| 423-949 | BLEDSOE TEL. COOP. | DUNLAP | – | yes | yes |
| 423-951 | T-Mobile | CHARLESTON | 2024-06-06 | yes | yes |
| 423-952 | Lumen | JOHNSON CY | – | yes | yes |
| 423-953 | Lumen | JOHNSON CY | – | – | yes |
| 423-954 | AT&T | CHATTNOOGA | – | yes | yes |
| 423-955 | FRACTEL, LLC | WHITWELL | 2020-07-15 | yes | yes |
| 423-956 | Verizon | BRISTOL | – | – | yes |
| 423-957 | T-Mobile | HAMPTON | – | yes | yes |
| 423-960 | Peerless | CHATTNOOGA | 2025-02-24 | yes | yes |
| 423-961 | AT&T | GEORGETOWN | – | yes | yes |
| 423-963 | T-Mobile | KINGSPORT | 2001-03-09 | yes | yes |
| 423-965 | HIGHLAND TEL. COOP, INC. | DEER LODGE | – | – | yes |
| 423-966 | FRACTEL, LLC | BALL PLAY | 2020-07-15 | yes | yes |
| 423-967 | T-Mobile | KINGSPORT | – | yes | yes |
| 423-968 | Lumen | BRISTOL | – | – | yes |
| 423-969 | Verizon | CLEVELAND | 2025-06-30 | yes | yes |
| 423-972 | T-Mobile | GREENEVL | – | yes | yes |
| 423-973 | Lumen | SNEEDVILLE | 2002-04-30 | yes | yes |
| 423-975 | Lumen | JOHNSON CY | – | – | yes |
| 423-977 | FRACTEL, LLC | CHATTNOOGA | 2019-07-18 | yes | yes |
| 423-978 | WAVENATION, LLC | CHATTNOOGA | 2025-07-11 | yes | yes |
| 423-979 | Lumen | JOHNSON CY | – | yes | yes |
| 423-980 | Onvoy | CHATTNOOGA | 2021-03-31 | yes | yes |
| 423-981 | WAVENATION, LLC | JOHNSON CY | 2025-07-11 | yes | yes |
| 423-987 | AT&T | CHATTNOOGA | – | – | yes |
| 423-989 | Lumen | BRISTOL | – | – | yes |
| 423-990 | Lumen | BRISTOL | – | – | yes |
| 423-991 | AT&T | CHATTNOOGA | – | – | yes |
| 423-992 | TERRA NOVA TELECOM INC. | BRISTOL | 2025-08-13 | yes | yes |
| 423-993 | HD CARRIER LLC | CHATTNOOGA | 2025-11-26 | yes | yes |
| 423-994 | AT&T | CHATTNOOGA | 2007-05-10 | yes | yes |
| 423-995 | HD CARRIER LLC | JOHNSON CY | 2025-11-26 | yes | yes |
| 423-996 | T-Mobile | CHARLESTON | 2025-09-25 | yes | yes |
| 423-997 | Bandwidth | ELIZABTHTN | 2025-08-07 | yes | yes |
| 423-998 | COMMIO, LLC | JELLICO | 2022-10-10 | yes | yes |
| 423-999 | T-Mobile | ATHENS | 2011-03-30 | yes | yes |
Frequently asked
How many prefixes does area code 423 have?
764 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 7,640 thousand-number ranges across 75 rate centers.
What do the first three digits after 423 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 423 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 423 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 563 of 423'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