Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
Area code 636 prefixes
435 of the 786 possible NXX blocks are assigned in area code 636 (55.3% of capacity), spread across 46 rate centers and 31 holders. The largest holders are SOUTHWESTERN BELL (110 blocks, 25.3%), BRIGHTSPEED OF MISSOURI, LLC (49 blocks, 11.3%), ONVOY, LLC - MO (36 blocks, 8.3%). Grouped by brand, AT&T accounts for 158 blocks; brand-attributable holders cover 96% 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 2001-01-18 to 2026-09-10, with 27 blocks handed out in 2001 alone. 366 blocks (84%) 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 (302, 494, 526) are not yet in service: assigned to a carrier but not open for calls, so a caller ID from one is spoofed. 89 were growth assignments – additional blocks to a carrier that had already filled its earlier ones.
435 assigned blocks of 786
46 rate centers
31 holders of record
84% in thousands-block pooling
Largest holders in 636
| Holder of record, as NANPA names it | Brand | Blocks | Share |
|---|---|---|---|
| SOUTHWESTERN BELL | AT&T | 110 | 25.3% |
| BRIGHTSPEED OF MISSOURI, LLC | Brightspeed | 49 | 11.3% |
| ONVOY, LLC - MO | Onvoy | 36 | 8.3% |
| T-MOBILE USA, INC. | T-Mobile | 35 | 8% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 29 | 6.7% |
| LEVEL 3 COMMUNICATIONS, LLC - MO | Lumen | 29 | 6.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | Verizon | 28 | 6.4% |
| PAETEC ITEL, LLC | Windstream | 25 | 5.7% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | Verizon | 20 | 4.6% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 18 | 4.1% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MO | AT&T | 15 | 3.4% |
| PEERLESS NETWORK OF MISSOURI, LLC - MO | Peerless | 4 | 0.9% |
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.
ST CHARLES 44CHESTERFLD 36HARVESTER 36MANCHESTER 27OFALLON 24FENTON 16FSSCRSTLCY 16ST PETERS 15VALLEYPARK 14WENTZVILLE 14MAXVILLE 13WASHINGTON 13UNION 12HIGH RIDGE 11TROY 11WARRENTON 10IMPERIAL 10CEDAR HILL 8DE SOTO 7POND 7PORTAGSIUX 7PACIFIC 6DARDENNE 6ANTONIA 6ST CLAIR 6EUREKA 6HERCUMPVLY 5FORISTELL 5GRAYSUMMIT 5HILLSBORO 5WINFIELD 4WARE 3WRIGHTCITY 3
All 435 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 |
|---|---|---|---|---|---|
| 636-200 | Onvoy | MANCHESTER | – | yes | yes |
| 636-201 | AT&T | WARRENTON | 2020-08-17 | yes | yes |
| 636-202 | Verizon | WARRENTON | 2018-09-18 | yes | yes |
| 636-203 | Verizon | FENTON | – | yes | yes |
| 636-204 | Onvoy | WARRENTON | 2021-06-17 | yes | yes |
| 636-205 | Lumen | WINFIELD | 2002-08-16 | yes | yes |
| 636-206 | AT&T | ST CHARLES | 2014-03-28 | yes | yes |
| 636-207 | AT&T | MANCHESTER | – | – | yes |
| 636-208 | AT&T | FSSCRSTLCY | 2002-10-23 | yes | yes |
| 636-209 | Verizon | FSSCRSTLCY | – | yes | yes |
| 636-210 | AT&T | UNION | 2020-09-29 | yes | yes |
| 636-212 | Verizon | MAXVILLE | 2002-10-28 | yes | yes |
| 636-213 | T-Mobile | WARRENTON | 2022-01-11 | yes | yes |
| 636-214 | T-Mobile | CHESTERFLD | 2022-01-11 | yes | yes |
| 636-215 | Verizon | MAXVILLE | 2016-01-07 | yes | yes |
| 636-216 | Onvoy | CHESTERFLD | – | yes | yes |
| 636-218 | AT&T | MAXVILLE | 2021-05-26 | yes | yes |
| 636-219 | T-Mobile | ST CHARLES | 2001-02-02 | – | yes |
| 636-220 | Charter | MANCHESTER | – | yes | yes |
| 636-221 | AT&T | WASHINGTON | 2002-05-14 | yes | yes |
| 636-222 | Verizon | CEDAR HILL | 2002-10-28 | yes | yes |
| 636-223 | Charter | IMPERIAL | 2002-01-29 | yes | yes |
| 636-224 | Windstream | HERCUMPVLY | – | yes | yes |
| 636-225 | AT&T | VALLEYPARK | – | – | yes |
| 636-226 | AT&T | VALLEYPARK | – | yes | yes |
| 636-227 | AT&T | MANCHESTER | – | – | yes |
| 636-228 | Brightspeed | AUGUSTA | – | yes | yes |
| 636-229 | Verizon | HARVESTER | – | yes | yes |
| 636-230 | AT&T | MANCHESTER | – | – | yes |
| 636-231 | Windstream | WASHINGTON | – | yes | yes |
| 636-232 | Lumen | FSSCRSTLCY | 2002-04-09 | yes | yes |
| 636-233 | Verizon | ST CHARLES | 2001-11-06 | yes | yes |
| 636-234 | Lumen | UNION | 2002-04-09 | yes | yes |
| 636-235 | Lumen | WARRENTON | 2002-04-09 | yes | yes |
| 636-236 | T-Mobile | CHESTERFLD | 2001-05-10 | yes | yes |
| 636-237 | Verizon | CHESTERFLD | – | yes | yes |
| 636-238 | Verizon | MANCHESTER | – | yes | yes |
| 636-239 | AT&T | WASHINGTON | – | – | yes |
| 636-240 | Brightspeed | OFALLON | – | – | yes |
| 636-241 | Verizon | WASHINGTON | 2022-08-03 | yes | yes |
| 636-242 | Brightspeed | MARTHASVL | 2006-10-12 | yes | yes |
| 636-243 | Lumen | DE SOTO | 2002-04-09 | yes | yes |
| 636-244 | Charter | HARVESTER | 2001-08-08 | yes | yes |
| 636-245 | AT&T | MAXVILLE | 2020-09-21 | yes | yes |
| 636-246 | Onvoy | ST CHARLES | – | yes | yes |
| 636-247 | AT&T | CHESTERFLD | 2002-05-16 | – | yes |
| 636-248 | Verizon | ST PETERS | – | – | yes |
| 636-249 | T-Mobile | UNION | 2014-07-03 | yes | yes |
| 636-250 | NEW FLORENCE TEL. CO., INC. | ORCHARDFRM | – | yes | yes |
| 636-251 | Verizon | FORISTELL | – | yes | yes |
| 636-252 | T-Mobile | CHESTERFLD | 2021-06-29 | yes | yes |
| 636-253 | T-Mobile | HIGH RIDGE | 2001-05-07 | yes | yes |
| 636-254 | Verizon | MANCHESTER | 2024-02-23 | yes | yes |
| 636-255 | AT&T | ST CHARLES | – | yes | yes |
| 636-256 | AT&T | MANCHESTER | – | – | yes |
| 636-257 | AT&T | PACIFIC | – | yes | yes |
| 636-258 | NEW FLORENCE TEL. CO., INC. | ORCHARDFRM | – | yes | yes |
| 636-259 | T-Mobile | GRAYSUMMIT | 2001-05-07 | yes | yes |
| 636-260 | Onvoy | ST CHARLES | 2024-02-26 | yes | yes |
| 636-261 | AT&T | HARVESTER | 2003-04-14 | yes | yes |
| 636-262 | T-Mobile | CHESTERFLD | – | yes | yes |
| 636-263 | AT&T | HARVESTER | 2001-10-18 | yes | yes |
| 636-264 | Lumen | WINFIELD | 2002-05-16 | yes | yes |
| 636-265 | Charter | DARDENNE | 2001-08-08 | yes | yes |
| 636-266 | Lumen | WASHINGTON | 2002-02-28 | yes | yes |
| 636-267 | Onvoy | ANTONIA | 2024-02-01 | yes | yes |
| 636-268 | Onvoy | CHESTERFLD | 2024-03-21 | yes | yes |
| 636-269 | Onvoy | MAXVILLE | 2024-03-21 | yes | yes |
| 636-270 | Onvoy | WARE | 2021-03-11 | yes | yes |
| 636-271 | AT&T | PACIFIC | – | yes | yes |
| 636-272 | Brightspeed | OFALLON | – | – | yes |
| 636-273 | AT&T | POND | – | yes | yes |
| 636-274 | AT&T | CEDAR HILL | – | yes | yes |
| 636-275 | Verizon | MAXVILLE | 2015-02-11 | yes | yes |
| 636-276 | Onvoy | ST CLAIR | 2024-06-12 | yes | yes |
| 636-277 | Peerless | ST CHARLES | 2010-03-08 | yes | yes |
| 636-278 | Brightspeed | ST PETERS | – | yes | yes |
| 636-279 | Brightspeed | ST PETERS | – | yes | yes |
| 636-280 | Onvoy | EUREKA | 2021-03-11 | yes | yes |
| 636-281 | Brightspeed | OFALLON | – | yes | yes |
| 636-282 | AT&T | MAXVILLE | – | yes | yes |
| 636-283 | AT&T | WASHINGTON | 2007-06-06 | yes | yes |
| 636-284 | AT&T | HARVESTER | 2002-05-15 | yes | yes |
| 636-285 | AT&T | CEDAR HILL | – | yes | yes |
| 636-286 | AT&T | UNION | 2024-12-17 | yes | yes |
| 636-287 | AT&T | MAXVILLE | – | yes | yes |
| 636-288 | AT&T | ST CHARLES | – | – | yes |
| 636-289 | Bandwidth | HAWK POINT | 2022-02-01 | yes | yes |
| 636-290 | T-Mobile | TROY | 2002-08-09 | yes | yes |
| 636-291 | AT&T | WASHINGTON | 2025-09-19 | yes | yes |
| 636-292 | AT&T | CHESTERFLD | 2018-04-26 | yes | yes |
| 636-293 | T-Mobile | OFALLON | 2002-08-09 | yes | yes |
| 636-294 | Charter | OFALLON | 2001-08-08 | – | yes |
| 636-295 | Verizon | TROY | – | yes | yes |
| 636-296 | AT&T | MAXVILLE | – | – | yes |
| 636-297 | Verizon | WARRENTON | – | yes | yes |
| 636-298 | AT&T | MANCHESTER | 2025-09-19 | yes | yes |
| 636-299 | T-Mobile | CHESTERFLD | – | yes | yes |
| 636-300 | AT&T | HARVESTER | 2001-05-01 | yes | yes |
| 636-301 | SHELCOMM | ST CHARLES | 2026-05-13 | – | yes |
| 636-302 | Onvoy | CHESTERFLD | 2026-09-10 | yes | no |
| 636-303 | Telnyx | UNION | 2017-03-23 | yes | yes |
| 636-305 | AT&T | FENTON | – | – | yes |
| 636-306 | T-Mobile | HERCUMPVLY | 2014-07-03 | yes | yes |
| 636-310 | Charter | HILLSBORO | 2016-04-05 | yes | yes |
| 636-312 | AT&T | OFALLON | 2015-11-06 | yes | yes |
| 636-313 | T-Mobile | MANCHESTER | 2026-04-02 | yes | yes |
| 636-317 | Charter | HARVESTER | 2016-02-18 | yes | yes |
| 636-318 | T-Mobile | TROY | – | yes | yes |
| 636-319 | Brightspeed | DARDENNE | 2020-05-14 | yes | yes |
| 636-320 | Spok | HARVESTER | – | – | yes |
| 636-321 | Windstream | MAXVILLE | – | yes | yes |
| 636-322 | AT&T | ST CLAIR | 2006-01-10 | yes | yes |
| 636-323 | Lumen | ANTONIA | 2003-01-10 | yes | yes |
| 636-324 | Onvoy | POND | – | yes | yes |
| 636-326 | AT&T | FENTON | – | yes | yes |
| 636-327 | Brightspeed | WENTZVILLE | – | – | yes |
| 636-328 | Verizon | ST CHARLES | – | yes | yes |
| 636-329 | AT&T | HARVESTER | 2001-05-01 | yes | yes |
| 636-330 | Peerless | DE SOTO | 2019-03-06 | yes | yes |
| 636-331 | T-Mobile | FSSCRSTLCY | 2017-08-09 | yes | yes |
| 636-332 | Brightspeed | WENTZVILLE | – | – | yes |
| 636-333 | Onvoy | MAXVILLE | – | yes | yes |
| 636-334 | Lumen | PACIFIC | 2003-01-10 | yes | yes |
| 636-335 | Verizon | FENTON | 2020-07-27 | yes | yes |
| 636-336 | Windstream | HARVESTER | – | yes | yes |
| 636-337 | AT&T | DE SOTO | – | yes | yes |
| 636-338 | Brightspeed | HAWK POINT | – | yes | yes |
| 636-339 | T-Mobile | OFALLON | 2020-08-25 | yes | yes |
| 636-341 | T-Mobile | FSSCRSTLCY | 2021-04-28 | yes | yes |
| 636-342 | Dish | HARVESTER | 2021-12-22 | yes | yes |
| 636-343 | AT&T | FENTON | – | – | yes |
| 636-344 | AT&T | HARVESTER | 2005-05-24 | yes | yes |
| 636-345 | Verizon | HARVESTER | – | yes | yes |
| 636-346 | T-Mobile | CHESTERFLD | – | yes | yes |
| 636-347 | HD CARRIER LLC | DE SOTO | 2021-05-14 | yes | yes |
| 636-348 | FRACTEL, LLC | ST PETERS | 2020-09-01 | yes | yes |
| 636-349 | AT&T | FENTON | – | – | yes |
| 636-351 | Dish | OFALLON | 2022-01-09 | yes | yes |
| 636-352 | Lumen | ST CHARLES | – | yes | yes |
| 636-354 | AT&T | HARVESTER | 2021-08-16 | yes | yes |
| 636-355 | Brightspeed | FOLEY | 2007-01-10 | yes | yes |
| 636-356 | Brightspeed | MOSCOW ML | – | yes | yes |
| 636-357 | AT&T | WENTZVILLE | – | yes | yes |
| 636-358 | AT&T | TROY | – | yes | yes |
| 636-359 | AT&T | WARRENTON | – | yes | yes |
| 636-362 | AT&T | HARVESTER | 2013-04-18 | yes | yes |
| 636-364 | Lumen | ST CLAIR | 2003-01-10 | yes | yes |
| 636-366 | Brightspeed | MOSCOW ML | – | yes | yes |
| 636-367 | T-Mobile | TROY | 2023-03-08 | yes | yes |
| 636-368 | T-Mobile | CHESTERFLD | 2001-07-05 | yes | yes |
| 636-369 | Onvoy | WASHINGTON | 2021-03-11 | yes | yes |
| 636-373 | T-Mobile | ST CHARLES | – | yes | yes |
| 636-375 | AT&T | HIGH RIDGE | – | yes | yes |
| 636-376 | AT&T | HIGH RIDGE | – | yes | yes |
| 636-377 | Brightspeed | WARRENTON | 2006-10-12 | yes | yes |
| 636-378 | T-Mobile | ST PETERS | 2023-07-28 | yes | yes |
| 636-379 | Brightspeed | OFALLON | – | yes | yes |
| 636-380 | Verizon | TROY | 2024-02-16 | yes | yes |
| 636-383 | T-Mobile | TROY | 2014-07-03 | yes | yes |
| 636-384 | AT&T | WRIGHTCITY | – | yes | yes |
| 636-385 | Brightspeed | OFALLON | 2011-02-25 | yes | yes |
| 636-386 | AT&T | MANCHESTER | – | yes | yes |
| 636-387 | Charter | ST PETERS | 2001-08-08 | yes | yes |
| 636-388 | Lumen | UNION | 2002-02-28 | yes | yes |
| 636-389 | Lumen | ST CHARLES | – | yes | yes |
| 636-390 | AT&T | WASHINGTON | – | – | yes |
| 636-391 | AT&T | MANCHESTER | – | – | yes |
| 636-392 | AURORA COMMUNICATIONS, INC. - MO | WASHINGTON | 2008-06-03 | yes | yes |
| 636-393 | Charter | PACIFIC | 2004-12-13 | yes | yes |
| 636-394 | AT&T | MANCHESTER | – | – | yes |
| 636-395 | AT&T | ST CHARLES | – | yes | yes |
| 636-396 | Onvoy | FSSCRSTLCY | 2024-03-13 | yes | yes |
| 636-397 | Brightspeed | ST PETERS | – | – | yes |
| 636-398 | Brightspeed | NEW MELLE | – | yes | yes |
| 636-399 | Verizon | MANCHESTER | – | – | yes |
| 636-400 | Onvoy | PORTAGSIUX | – | yes | yes |
| 636-402 | Windstream | GRAYSUMMIT | 2001-07-05 | yes | yes |
| 636-403 | Spok | HARVESTER | – | – | yes |
| 636-405 | AT&T | POND | – | yes | yes |
| 636-406 | Onvoy | CEDAR HILL | 2024-03-21 | yes | yes |
| 636-407 | Onvoy | DE SOTO | 2024-03-21 | yes | yes |
| 636-408 | Onvoy | HIGH RIDGE | 2024-03-21 | yes | yes |
| 636-409 | Charter | OFALLON | 2016-01-05 | yes | yes |
| 636-410 | Verizon | ST CHARLES | – | yes | yes |
| 636-412 | Verizon | VALLEYPARK | – | – | yes |
| 636-415 | AT&T | HARVESTER | 2024-04-16 | yes | yes |
| 636-422 | AT&T | POND | 2005-05-11 | yes | yes |
| 636-424 | Onvoy | POND | 2024-03-29 | yes | yes |
| 636-425 | Windstream | PORTAGSIUX | – | yes | yes |
| 636-426 | T-Mobile | PORTAGSIUX | 2001-05-10 | yes | yes |
| 636-427 | AT&T | ST PETERS | 2025-01-07 | yes | yes |
| 636-428 | AT&T | HIGH RIDGE | 2015-06-16 | yes | yes |
| 636-429 | Peerless | EUREKA | 2013-02-01 | yes | yes |
| 636-430 | T-Mobile | FORISTELL | 2025-05-05 | yes | yes |
| 636-431 | Verizon | VALLEYPARK | – | yes | yes |
| 636-432 | AT&T | WASHINGTON | 2006-01-10 | yes | yes |
| 636-433 | Brightspeed | MARTHASVL | – | yes | yes |
| 636-434 | AT&T | PORTAGSIUX | 2001-07-05 | yes | yes |
| 636-435 | Verizon | VALLEYPARK | – | yes | yes |
| 636-438 | Verizon | MANCHESTER | – | yes | yes |
| 636-439 | AT&T | OFALLON | 2011-01-14 | yes | yes |
| 636-441 | AT&T | HARVESTER | – | – | yes |
| 636-442 | AT&T | HARVESTER | – | yes | yes |
| 636-443 | AT&T | ST CHARLES | – | yes | yes |
| 636-444 | Onvoy | VALLEYPARK | – | yes | yes |
| 636-445 | Lumen | WENTZVILLE | 2012-11-13 | yes | yes |
| 636-447 | AT&T | HARVESTER | – | – | yes |
| 636-448 | AT&T | ST CHARLES | – | – | yes |
| 636-449 | Windstream | CHESTERFLD | – | yes | yes |
| 636-450 | AT&T | HARVESTER | 2025-05-09 | yes | yes |
| 636-451 | AT&T | GRAYSUMMIT | – | yes | yes |
| 636-452 | AT&T | WARE | – | yes | yes |
| 636-456 | Brightspeed | WARRENTON | – | – | yes |
| 636-458 | AT&T | POND | – | – | yes |
| 636-459 | Verizon | FORISTELL | – | yes | yes |
| 636-461 | AT&T | IMPERIAL | – | yes | yes |
| 636-462 | Brightspeed | TROY | – | yes | yes |
| 636-463 | Brightspeed | FORISTELL | – | yes | yes |
| 636-464 | AT&T | IMPERIAL | – | – | yes |
| 636-465 | Charter | FSSCRSTLCY | 2006-11-07 | yes | yes |
| 636-466 | AT&T | WENTZVILLE | 2008-03-28 | yes | yes |
| 636-467 | AT&T | IMPERIAL | – | yes | yes |
| 636-470 | SHELCOMM | OFALLON | 2026-05-13 | – | yes |
| 636-473 | AT&T | ANTONIA | 2025-07-24 | yes | yes |
| 636-474 | Brightspeed | OFALLON | – | yes | yes |
| 636-475 | AT&T | HERCUMPVLY | – | yes | yes |
| 636-477 | AT&T | HARVESTER | – | yes | yes |
| 636-479 | AT&T | HERCUMPVLY | – | yes | yes |
| 636-481 | Lumen | HILLSBORO | 2001-07-05 | yes | yes |
| 636-482 | Brightspeed | AUGUSTA | – | yes | yes |
| 636-484 | Verizon | MANCHESTER | – | yes | yes |
| 636-485 | Verizon | ST PETERS | – | – | yes |
| 636-486 | Lumen | HARVESTER | 2002-08-26 | yes | yes |
| 636-487 | Lumen | ST CHARLES | 2002-08-26 | yes | yes |
| 636-488 | Brightspeed | JONESBURG | – | yes | yes |
| 636-489 | Lumen | CHESTERFLD | – | yes | yes |
| 636-492 | Verizon | FENTON | – | yes | yes |
| 636-493 | Charter | ST CHARLES | – | yes | yes |
| 636-494 | Onvoy | EUREKA | 2026-07-30 | yes | no |
| 636-495 | Windstream | HIGH RIDGE | 2013-08-19 | yes | yes |
| 636-496 | AT&T | FENTON | 2008-10-10 | yes | yes |
| 636-497 | T-Mobile | WENTZVILLE | – | yes | yes |
| 636-498 | AT&T | HARVESTER | – | yes | yes |
| 636-500 | Onvoy | IMPERIAL | – | yes | yes |
| 636-515 | AT&T | OFALLON | 2014-01-27 | yes | yes |
| 636-517 | AT&T | VALLEYPARK | 2001-07-05 | yes | yes |
| 636-519 | AT&T | CHESTERFLD | – | – | yes |
| 636-524 | Lumen | FSSCRSTLCY | 2002-03-13 | yes | yes |
| 636-525 | AT&T | IMPERIAL | 2001-07-05 | yes | yes |
| 636-526 | Onvoy | HARVESTER | 2026-08-26 | yes | no |
| 636-527 | AT&T | MANCHESTER | – | – | yes |
| 636-528 | Brightspeed | TROY | – | – | yes |
| 636-529 | AT&T | VALLEYPARK | – | yes | yes |
| 636-530 | AT&T | CHESTERFLD | – | – | yes |
| 636-532 | AT&T | CHESTERFLD | – | – | yes |
| 636-533 | Verizon | FENTON | – | – | yes |
| 636-534 | Verizon | CHESTERFLD | – | yes | yes |
| 636-535 | Verizon | FSSCRSTLCY | 2014-11-10 | yes | yes |
| 636-536 | AT&T | CHESTERFLD | – | yes | yes |
| 636-537 | AT&T | CHESTERFLD | – | – | yes |
| 636-538 | T-Mobile | WENTZVILLE | – | yes | yes |
| 636-541 | AT&T | ST CHARLES | 2001-06-08 | yes | yes |
| 636-542 | Windstream | OFALLON | 2007-06-19 | yes | yes |
| 636-543 | AT&T | FSSCRSTLCY | 2009-07-08 | yes | yes |
| 636-544 | AT&T | OFALLON | 2002-03-20 | yes | yes |
| 636-547 | Lumen | IMPERIAL | – | yes | yes |
| 636-548 | Bandwidth | MAXVILLE | – | yes | yes |
| 636-549 | Windstream | EUREKA | – | yes | yes |
| 636-551 | Verizon | CEDAR HILL | 2014-03-17 | yes | yes |
| 636-552 | Lumen | MANCHESTER | – | yes | yes |
| 636-556 | Onvoy | VALLEYPARK | – | yes | yes |
| 636-557 | Verizon | MANCHESTER | – | yes | yes |
| 636-561 | Brightspeed | DARDENNE | – | – | yes |
| 636-565 | Lumen | DE SOTO | 2002-02-27 | yes | yes |
| 636-566 | Brightspeed | WINFIELD | – | yes | yes |
| 636-573 | Verizon | ST CHARLES | – | – | yes |
| 636-574 | American Messaging | ST CHARLES | – | – | yes |
| 636-575 | AT&T | HIGH RIDGE | 2001-11-12 | yes | yes |
| 636-577 | AT&T | ST PETERS | 2002-03-20 | yes | yes |
| 636-578 | T-Mobile | ST CHARLES | 2001-02-02 | yes | yes |
| 636-579 | T-Mobile | CHESTERFLD | 2001-01-26 | yes | yes |
| 636-582 | AURORA COMMUNICATIONS, INC. - MO | UNION | 2008-06-05 | yes | yes |
| 636-583 | AT&T | UNION | – | – | yes |
| 636-584 | AT&T | UNION | – | yes | yes |
| 636-585 | Brightspeed | HIGH HILL | – | yes | yes |
| 636-586 | AT&T | DE SOTO | – | – | yes |
| 636-587 | AT&T | EUREKA | – | yes | yes |
| 636-589 | Onvoy | WARRENTON | 2022-11-15 | yes | yes |
| 636-590 | Lumen | CHESTERFLD | – | yes | yes |
| 636-591 | Windstream | MANCHESTER | – | yes | yes |
| 636-594 | Verizon | MANCHESTER | – | yes | yes |
| 636-597 | Brightspeed | TRUXTON | – | yes | yes |
| 636-600 | Onvoy | FENTON | – | yes | yes |
| 636-614 | Lumen | OFALLON | 2001-10-08 | yes | yes |
| 636-622 | Verizon | TROY | – | yes | yes |
| 636-625 | Brightspeed | DARDENNE | – | – | yes |
| 636-626 | Onvoy | ST PETERS | – | yes | yes |
| 636-627 | Charter | ST CHARLES | 2002-06-07 | yes | yes |
| 636-628 | Lumen | MANCHESTER | – | yes | yes |
| 636-629 | AT&T | ST CLAIR | – | – | yes |
| 636-630 | COMMIO, LLC | OFALLON | 2022-05-19 | yes | yes |
| 636-633 | T-Mobile | IMPERIAL | 2001-05-07 | yes | yes |
| 636-634 | Lumen | ST CHARLES | – | yes | yes |
| 636-635 | Charter | CEDAR HILL | 2021-06-04 | yes | yes |
| 636-637 | Verizon | FSSCRSTLCY | 2019-09-03 | yes | yes |
| 636-638 | Charter | FSSCRSTLCY | 2012-05-22 | yes | yes |
| 636-639 | Brightspeed | WENTZVILLE | – | yes | yes |
| 636-642 | Lumen | IMPERIAL | – | yes | yes |
| 636-648 | TERRA NOVA TELECOM INC. | PORTAGSIUX | – | yes | yes |
| 636-649 | AT&T | UNION | 2011-10-27 | yes | yes |
| 636-651 | AT&T | FENTON | – | yes | yes |
| 636-655 | SKYE TELECOM LLC DBA SKYETEL | WENTZVILLE | 2021-09-08 | yes | yes |
| 636-660 | Windstream | FENTON | 2002-08-13 | yes | yes |
| 636-661 | Brightspeed | OLD MONROE | – | yes | yes |
| 636-662 | Brightspeed | FOLEY | – | yes | yes |
| 636-665 | Brightspeed | OLD MONROE | – | yes | yes |
| 636-666 | TERRA NOVA TELECOM INC. | UNION | 2018-12-24 | yes | yes |
| 636-667 | T-Mobile | WASHINGTON | 2002-01-16 | yes | yes |
| 636-668 | Brightspeed | WINFIELD | – | yes | yes |
| 636-669 | Windstream | ST CHARLES | – | yes | yes |
| 636-671 | AT&T | HIGH RIDGE | – | yes | yes |
| 636-673 | Brightspeed | FORISTELL | – | yes | yes |
| 636-674 | Windstream | ANTONIA | – | yes | yes |
| 636-675 | T-Mobile | CHESTERFLD | 2001-01-18 | yes | yes |
| 636-677 | AT&T | HIGH RIDGE | – | – | yes |
| 636-678 | Lumen | FENTON | – | yes | yes |
| 636-679 | T-Mobile | WENTZVILLE | – | yes | yes |
| 636-680 | Windstream | FENTON | – | yes | yes |
| 636-681 | AT&T | CHESTERFLD | – | yes | yes |
| 636-685 | AT&T | HARVESTER | – | yes | yes |
| 636-686 | AT&T | MANCHESTER | – | yes | yes |
| 636-688 | AT&T | ST CHARLES | – | yes | yes |
| 636-689 | AT&T | VALLEYPARK | – | yes | yes |
| 636-692 | Windstream | HIGH RIDGE | – | yes | yes |
| 636-695 | AT&T | DARDENNE | – | yes | yes |
| 636-696 | AT&T | OFALLON | – | yes | yes |
| 636-697 | AT&T | ST PETERS | – | yes | yes |
| 636-698 | AT&T | WENTZVILLE | – | yes | yes |
| 636-699 | Onvoy | ST CHARLES | – | yes | yes |
| 636-706 | Lumen | ST PETERS | 2013-09-20 | yes | yes |
| 636-707 | Lumen | CEDAR HILL | 2004-12-07 | yes | yes |
| 636-717 | AT&T | FENTON | – | yes | yes |
| 636-720 | Windstream | HARVESTER | – | yes | yes |
| 636-722 | AT&T | HARVESTER | – | – | yes |
| 636-723 | AT&T | ST CHARLES | – | yes | yes |
| 636-724 | AT&T | ST CHARLES | – | – | yes |
| 636-725 | Windstream | FSSCRSTLCY | 2011-04-18 | yes | yes |
| 636-728 | AT&T | CHESTERFLD | – | yes | yes |
| 636-730 | AT&T | CHESTERFLD | – | yes | yes |
| 636-732 | FRACTEL, LLC | GRAYSUMMIT | 2019-10-24 | yes | yes |
| 636-733 | AT&T | CHESTERFLD | – | yes | yes |
| 636-734 | T-Mobile | ST CHARLES | – | yes | yes |
| 636-735 | AT&T | CHESTERFLD | – | yes | yes |
| 636-736 | AT&T | CHESTERFLD | – | yes | yes |
| 636-737 | AT&T | CHESTERFLD | – | – | yes |
| 636-741 | Windstream | IMPERIAL | – | yes | yes |
| 636-742 | AT&T | GRAYSUMMIT | – | yes | yes |
| 636-744 | AT&T | UNION | 2006-03-28 | yes | yes |
| 636-745 | Brightspeed | WRIGHTCITY | – | yes | yes |
| 636-746 | TON80 COMMUNICATIONS, LLC | MAXVILLE | 2022-02-04 | yes | yes |
| 636-747 | Onvoy | PACIFIC | 2016-01-05 | yes | yes |
| 636-748 | Bandwidth | CEDAR HILL | – | yes | yes |
| 636-751 | Verizon | MANCHESTER | – | – | yes |
| 636-753 | AT&T | PORTAGSIUX | – | yes | yes |
| 636-754 | Verizon | ST CHARLES | – | – | yes |
| 636-755 | Brightspeed | DARDENNE | 2005-01-20 | yes | yes |
| 636-757 | Windstream | ST CHARLES | – | yes | yes |
| 636-758 | FRACTEL, LLC | ST CLAIR | 2019-10-25 | yes | yes |
| 636-764 | Lumen | FENTON | – | yes | yes |
| 636-773 | Onvoy | ST CHARLES | – | yes | yes |
| 636-775 | Charter | TROY | 2011-02-07 | yes | yes |
| 636-777 | Onvoy | CHESTERFLD | – | yes | yes |
| 636-778 | Charter | CHESTERFLD | – | yes | yes |
| 636-779 | Windstream | MANCHESTER | – | yes | yes |
| 636-782 | Brightspeed | HOLSTEIN | 2007-01-10 | yes | yes |
| 636-787 | Verizon | CHESTERFLD | – | – | yes |
| 636-789 | AT&T | HILLSBORO | – | yes | yes |
| 636-791 | Brightspeed | WRIGHTCITY | 2007-01-10 | yes | yes |
| 636-793 | Verizon | HARVESTER | – | yes | yes |
| 636-794 | Verizon | HARVESTER | – | – | yes |
| 636-795 | AT&T | ST CHARLES | – | – | yes |
| 636-797 | AT&T | HILLSBORO | – | yes | yes |
| 636-798 | Brightspeed | DEFIANCE | – | yes | yes |
| 636-800 | Onvoy | ST CHARLES | 2015-10-14 | yes | yes |
| 636-812 | Windstream | CHESTERFLD | – | yes | yes |
| 636-821 | Windstream | POND | – | yes | yes |
| 636-825 | AT&T | VALLEYPARK | – | yes | yes |
| 636-827 | AT&T | VALLEYPARK | – | – | yes |
| 636-828 | Brightspeed | NEW MELLE | – | yes | yes |
| 636-829 | T-Mobile | HIGH RIDGE | 2019-02-06 | yes | yes |
| 636-837 | TON80 COMMUNICATIONS, LLC | HERCUMPVLY | 2020-12-22 | yes | yes |
| 636-841 | T-Mobile | WENTZVILLE | – | yes | yes |
| 636-849 | T-Mobile | OFALLON | 2017-04-06 | yes | yes |
| 636-851 | AT&T | HARVESTER | 2001-07-05 | yes | yes |
| 636-856 | Charter | WENTZVILLE | 2008-01-23 | yes | yes |
| 636-861 | AT&T | VALLEYPARK | – | – | yes |
| 636-865 | AT&T | HILLSBORO | 2017-03-24 | yes | yes |
| 636-866 | Verizon | ST CHARLES | – | yes | yes |
| 636-867 | TON80 COMMUNICATIONS, LLC | JONESBURG | 2022-01-11 | yes | yes |
| 636-874 | TON80 COMMUNICATIONS, LLC | OFALLON | 2022-02-17 | yes | yes |
| 636-875 | Windstream | ST PETERS | 2007-07-06 | yes | yes |
| 636-887 | Charter | WENTZVILLE | 2004-12-13 | yes | yes |
| 636-888 | Peerless | ST CLAIR | 2014-01-21 | yes | yes |
| 636-891 | AT&T | MANCHESTER | – | yes | yes |
| 636-893 | Verizon | MANCHESTER | – | yes | yes |
| 636-896 | AT&T | ST CHARLES | – | yes | yes |
| 636-898 | Verizon | CHESTERFLD | – | yes | yes |
| 636-899 | AT&T | PORTAGSIUX | – | yes | yes |
| 636-900 | Onvoy | WASHINGTON | 2015-10-14 | yes | yes |
| 636-916 | AT&T | ST CHARLES | – | – | yes |
| 636-922 | AT&T | HARVESTER | – | yes | yes |
| 636-923 | Windstream | VALLEYPARK | – | yes | yes |
| 636-925 | AT&T | ST CHARLES | – | yes | yes |
| 636-926 | AT&T | HARVESTER | – | yes | yes |
| 636-928 | AT&T | HARVESTER | – | – | yes |
| 636-931 | AT&T | FSSCRSTLCY | – | yes | yes |
| 636-932 | Brightspeed | HOLSTEIN | – | yes | yes |
| 636-933 | AT&T | FSSCRSTLCY | – | yes | yes |
| 636-936 | AT&T | HARVESTER | – | yes | yes |
| 636-937 | AT&T | FSSCRSTLCY | – | – | yes |
| 636-938 | AT&T | EUREKA | – | yes | yes |
| 636-939 | AT&T | HARVESTER | – | yes | yes |
| 636-940 | AT&T | ST CHARLES | – | – | yes |
| 636-942 | AT&T | ANTONIA | – | yes | yes |
| 636-944 | AT&T | WARE | – | yes | yes |
| 636-946 | AT&T | ST CHARLES | – | – | yes |
| 636-947 | AT&T | ST CHARLES | – | – | yes |
| 636-948 | AT&T | ANTONIA | – | yes | yes |
| 636-949 | AT&T | ST CHARLES | – | – | yes |
| 636-970 | Brightspeed | ST PETERS | – | yes | yes |
| 636-978 | Brightspeed | OFALLON | – | – | yes |
| 636-980 | Brightspeed | OFALLON | – | yes | yes |
| 636-987 | Brightspeed | DEFIANCE | – | yes | yes |
| 636-999 | Onvoy | PACIFIC | 2015-03-20 | yes | yes |
Frequently asked
How many prefixes does area code 636 have?
435 NXX blocks are assigned of 786 possible. Each block is 10,000 consecutive numbers, so the code currently covers about 4,350 thousand-number ranges across 46 rate centers.
What do the first three digits after 636 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 636 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 636 table?
That the block is in thousands-block pooling: carriers draw 1,000-number lots from it instead of taking all 10,000. 366 of 636'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