ST LOUIS prefixes in area code 557
NANPA records 36 assigned NXX blocks to rate center ST LOUIS in area code 557, 42.9% of the 84 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. 15 holders hold those blocks, the largest being TELEPORT COMMUNICATIONS AMERICA, LLC - MO (12), NEW CINGULAR WIRELESS PCS, LLC - IL (6), ONVOY, LLC - MO (4). The earliest assignment on record here is 2022-08-08 and the most recent 2026-09-23. 35 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 314, 405, 572, 989 – 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 |
|---|---|---|---|---|
| 557-202 | Comcast COMCAST IP PHONE, LLC | 2023-03-27 | yes | yes |
| 557-204 | FIVE9, INC. | 2023-05-22 | yes | yes |
| 557-205 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-06-01 | yes | yes |
| 557-206 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-06-01 | yes | yes |
| 557-213 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2023-09-29 | yes | yes |
| 557-214 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2023-11-13 | yes | yes |
| 557-215 | CALLWORKS CORPORATION | 2023-11-15 | yes | yes |
| 557-216 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-06-01 | yes | yes |
| 557-222 | LEAP TELECOM, LLC | 2023-05-04 | yes | yes |
| 557-228 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 2024-11-25 | yes | yes |
| 557-231 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2025-01-03 | yes | yes |
| 557-233 | Dish BOOST SUBSCRIBERCO L.L.C. | 2025-02-25 | yes | yes |
| 557-234 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2025-03-13 | yes | yes |
| 557-239 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 2025-07-02 | yes | yes |
| 557-242 | Onvoy ONVOY, LLC - MO | 2025-09-24 | yes | yes |
| 557-243 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2025-10-09 | yes | yes |
| 557-245 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2025-11-12 | yes | yes |
| 557-246 | WAVENATION, LLC | 2025-12-03 | yes | yes |
| 557-248 | E. RITTER COMMUNICATIONS, LLC | 2025-12-29 | yes | yes |
| 557-250 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2026-02-05 | yes | yes |
| 557-252 | SHELCOMM | 2026-05-13 | no | yes |
| 557-262 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2026-08-20 | yes | no |
| 557-263 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2026-08-24 | yes | no |
| 557-265 | Onvoy ONVOY, LLC - MO | 2026-09-21 | yes | no |
| 557-273 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-01-25 | yes | yes |
| 557-362 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-01-25 | yes | yes |
| 557-454 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-01-25 | yes | yes |
| 557-467 | Onvoy ONVOY, LLC - MO | 2022-08-08 | yes | yes |
| 557-500 | Charter ONVOY SPECTRUM, LLC | 2022-08-12 | yes | yes |
| 557-507 | Charter ONVOY SPECTRUM, LLC | 2023-08-16 | yes | yes |
| 557-557 | Onvoy ONVOY, LLC - MO | 2023-05-15 | yes | yes |
| 557-653 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-01-25 | yes | yes |
| 557-747 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-01-25 | yes | yes |
| 557-880 | 8x8 8X8, INC. | 2026-09-23 | yes | no |
| 557-953 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-01-25 | yes | yes |
| 557-996 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 2023-01-25 | yes | 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 |
|---|---|---|---|
| TELEPORT COMMUNICATIONS AMERICA, LLC - MO | AT&T | 12 | 33.3% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 6 | 16.7% |
| ONVOY, LLC - MO | Onvoy | 4 | 11.1% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | Verizon | 2 | 5.6% |
| ONVOY SPECTRUM, LLC | Charter | 2 | 5.6% |
| COMCAST IP PHONE, LLC | Comcast | 1 | 2.8% |
| FIVE9, INC. | – | 1 | 2.8% |
| CALLWORKS CORPORATION | – | 1 | 2.8% |
| LEAP TELECOM, LLC | – | 1 | 2.8% |
| BOOST SUBSCRIBERCO L.L.C. | Dish | 1 | 2.8% |
| WAVENATION, LLC | – | 1 | 2.8% |
| E. RITTER COMMUNICATIONS, LLC | – | 1 | 2.8% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 2.8% |
| SHELCOMM | – | 1 | 2.8% |
| 8X8, INC. | 8x8 | 1 | 2.8% |
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 LOUIS in area code 557?
36 blocks: 202, 204, 205, 206, 213, 214, 215, 216, 222, 228, 231, 233 and 24 more, all listed in the table above.
Which carriers have numbers in ST LOUIS?
TELEPORT COMMUNICATIONS AMERICA, LLC - MO (12 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (6 blocks), ONVOY, LLC - MO (4 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO (2 blocks), ONVOY SPECTRUM, LLC (2 blocks), COMCAST IP PHONE, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is ST LOUIS 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.