ST CHARLES prefixes in area code 331
NANPA records 18 assigned NXX blocks to rate center ST CHARLES in area code 331, 8.0% of the 224 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. 7 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (7), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (5), ONVOY, LLC (2). The earliest assignment on record here is 2008-10-28 and the most recent 2026-08-14. 18 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, 507, 630 – 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 |
|---|---|---|---|---|
| 331-210 | Peerless PEERLESS NETWORK OF ILLINOIS, LLC - IL | 2012-03-06 | yes | yes |
| 331-222 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2008-10-28 | yes | yes |
| 331-223 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2008-10-28 | yes | yes |
| 331-228 | Windstream PAETEC ITEL, LLC | 2011-09-21 | yes | yes |
| 331-235 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2017-10-17 | yes | yes |
| 331-266 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2020-04-10 | yes | yes |
| 331-272 | Onvoy ONVOY, LLC | 2021-07-15 | yes | yes |
| 331-276 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2014-11-10 | yes | yes |
| 331-286 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2022-07-15 | yes | yes |
| 331-314 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2023-11-17 | yes | yes |
| 331-327 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2024-11-14 | yes | yes |
| 331-335 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2024-04-30 | yes | yes |
| 331-349 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2026-08-14 | yes | no |
| 331-422 | Lumen LEVEL 3 COMMUNICATIONS, LLC - IL | 2008-11-13 | yes | yes |
| 331-442 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2008-10-30 | yes | yes |
| 331-588 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2010-02-15 | yes | yes |
| 331-771 | Onvoy ONVOY, LLC | 2016-02-10 | yes | yes |
| 331-901 | Bandwidth BANDWIDTH.COM CLEC, LLC - IL | 2015-04-23 | 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 |
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 7 | 38.9% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Verizon | 5 | 27.8% |
| ONVOY, LLC | Onvoy | 2 | 11.1% |
| PEERLESS NETWORK OF ILLINOIS, LLC - IL | Peerless | 1 | 5.6% |
| PAETEC ITEL, LLC | Windstream | 1 | 5.6% |
| LEVEL 3 COMMUNICATIONS, LLC - IL | Lumen | 1 | 5.6% |
| BANDWIDTH.COM CLEC, LLC - IL | Bandwidth | 1 | 5.6% |
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 331?
18 blocks: 210, 222, 223, 228, 235, 266, 272, 276, 286, 314, 327, 335 and 6 more, all listed in the table above.
Which carriers have numbers in ST CHARLES?
NEW CINGULAR WIRELESS PCS, LLC - IL (7 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (5 blocks), ONVOY, LLC (2 blocks), PEERLESS NETWORK OF ILLINOIS, LLC - IL (1 block), PAETEC ITEL, LLC (1 block), LEVEL 3 COMMUNICATIONS, LLC - IL (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 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.