ST CHARLES prefixes in area code 636
NANPA records 44 assigned NXX blocks to rate center ST CHARLES in area code 636, 10.1% of the 435 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 14 holders hold those blocks, the largest being SOUTHWESTERN BELL (11), ONVOY, LLC - MO (5), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO (5). The earliest assignment on record here is 2001-02-02 and the most recent 2026-05-13. 30 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 270, 276, 331, 507 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 636-206 | AT&T AT&T ENTERPRISES, LLC | 2014-03-28 | yes | yes |
| 636-219 | T-Mobile T-MOBILE USA, INC. | 2001-02-02 | no | yes |
| 636-233 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 2001-11-06 | yes | yes |
| 636-246 | Onvoy ONVOY, LLC - MO | – | yes | yes |
| 636-255 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 636-260 | Onvoy ONVOY, LLC - MO | 2024-02-26 | yes | yes |
| 636-277 | Peerless PEERLESS NETWORK OF MISSOURI, LLC - MO | 2010-03-08 | yes | yes |
| 636-288 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | – | no | yes |
| 636-301 | SHELCOMM | 2026-05-13 | no | yes |
| 636-328 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | – | yes | yes |
| 636-352 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MO | – | yes | yes |
| 636-373 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 636-389 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MO | – | yes | yes |
| 636-395 | AT&T AT&T ENTERPRISES, LLC | – | yes | yes |
| 636-410 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | – | yes | yes |
| 636-443 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 636-448 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | – | no | yes |
| 636-487 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MO | 2002-08-26 | yes | yes |
| 636-493 | Charter CHARTER IP ENABLED SERVICES, LLC | – | yes | yes |
| 636-541 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2001-06-08 | yes | yes |
| 636-573 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | – | no | yes |
| 636-574 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 636-578 | T-Mobile T-MOBILE USA, INC. | 2001-02-02 | yes | yes |
| 636-627 | Charter CHARTER IP ENABLED SERVICES, LLC | 2002-06-07 | yes | yes |
| 636-634 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MO | – | yes | yes |
| 636-669 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 636-688 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | – | yes | yes |
| 636-699 | Onvoy ONVOY, LLC - MO | – | yes | yes |
| 636-723 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 636-724 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 636-734 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 636-754 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | – | no | yes |
| 636-757 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 636-773 | Onvoy ONVOY, LLC - MO | – | yes | yes |
| 636-795 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | – | no | yes |
| 636-800 | Onvoy ONVOY, LLC - MO | 2015-10-14 | yes | yes |
| 636-866 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | – | yes | yes |
| 636-896 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 636-916 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 636-925 | AT&T SOUTHWESTERN BELL | – | yes | yes |
| 636-940 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 636-946 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 636-947 | AT&T SOUTHWESTERN BELL | – | no | yes |
| 636-949 | AT&T SOUTHWESTERN BELL | – | no | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| SOUTHWESTERN BELL | AT&T | 11 | 25% |
| ONVOY, LLC - MO | Onvoy | 5 | 11.4% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | Verizon | 5 | 11.4% |
| T-MOBILE USA, INC. | T-Mobile | 4 | 9.1% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 4 | 9.1% |
| LEVEL 3 COMMUNICATIONS, LLC - MO | Lumen | 4 | 9.1% |
| AT&T ENTERPRISES, LLC | AT&T | 2 | 4.5% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 2 | 4.5% |
| PAETEC ITEL, LLC | Windstream | 2 | 4.5% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | Verizon | 1 | 2.3% |
| PEERLESS NETWORK OF MISSOURI, LLC - MO | Peerless | 1 | 2.3% |
| SHELCOMM | – | 1 | 2.3% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 1 | 2.3% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MO | AT&T | 1 | 2.3% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to ST CHARLES in area code 636?
44 blocks: 206, 219, 233, 246, 255, 260, 277, 288, 301, 328, 352, 373 and 32 more, all listed in the table above.
Which carriers have numbers in ST CHARLES?
SOUTHWESTERN BELL (11 blocks), ONVOY, LLC - MO (5 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO (5 blocks), T-MOBILE USA, INC. (4 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (4 blocks), LEVEL 3 COMMUNICATIONS, LLC - MO (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is ST CHARLES a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.