NEW CINGULAR WIRELESS PCS, LLC - IL
26 prefixes in 331 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 331-216 | OSWEGO | 6534 | 2012-10-31 | Yes |
| 331-222 | ST CHARLES | 6534 | 2008-10-28 | Yes |
| 331-223 | ST CHARLES | 6534 | 2008-10-28 | Yes |
| 331-231 | NAPERVILLE | 6534 | 2017-08-07 | Yes |
| 331-232 | W CHICAGO | 6534 | 2017-08-08 | Yes |
| 331-235 | ST CHARLES | 6534 | 2017-10-17 | Yes |
| 331-257 | AURORA | 6534 | 2020-01-17 | Yes |
| 331-266 | ST CHARLES | 6534 | 2020-04-10 | Yes |
| 331-277 | LOMBARD | 6534 | 2021-08-06 | Yes |
| 331-278 | AURORA | 6534 | 2021-08-13 | Yes |
| 331-293 | AURORA | 6534 | 2023-01-10 | Yes |
| 331-315 | LOMBARD | 6534 | 2016-08-08 | Yes |
| 331-328 | NAPERVILLE | 6534 | 2024-12-16 | Yes |
| 331-330 | NAPERVILLE | 6534 | 2008-08-19 | Yes |
| 331-332 | NAPERVILLE | 6534 | 2008-11-03 | Yes |
| 331-333 | NAPERVILLE | 6534 | 2008-11-03 | Yes |
| 331-335 | ST CHARLES | 6534 | 2024-04-30 | Yes |
| 331-337 | OSWEGO | 6534 | 2025-01-09 | Yes |
| 331-349 | ST CHARLES | 6534 | 2026-08-14 | Yes |
| 331-385 | AURORA | 6534 | 2016-09-28 | Yes |
| 331-454 | AURORA | 6534 | 2009-05-07 | Yes |
| 331-465 | W CHICAGO | 6534 | 2007-10-17 | Yes |
| 331-551 | LOMBARD | 6534 | 2008-11-05 | Yes |
| 331-588 | ST CHARLES | 6534 | 2010-02-15 | Yes |
| 331-717 | OSWEGO | 6534 | 2016-01-18 | Yes |
| 331-725 | OSWEGO | 6534 | — | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.