ONVOY, LLC
39 prefixes in 331 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 331-204 | NAPERVILLE | 224C | 2015-12-10 | Yes |
| 331-217 | LOMBARD | 224C | 2023-07-11 | Yes |
| 331-224 | ITASCA | 224C | 2023-06-05 | Yes |
| 331-239 | YORKVILLE | 224C | 2018-08-27 | Yes |
| 331-241 | LOMBARD | 224C | — | Yes |
| 331-244 | NAPERVILLE | 224C | 2017-09-21 | Yes |
| 331-249 | NAPERVILLE | 224C | 2018-12-05 | Yes |
| 331-255 | AURORA | 224C | 2017-08-22 | Yes |
| 331-258 | AURORA | 224C | — | Yes |
| 331-263 | ITASCA | 224C | 2016-03-11 | Yes |
| 331-265 | GENEVA | 224C | — | Yes |
| 331-270 | AURORA | 224C | 2021-07-20 | Yes |
| 331-271 | HINSDALE | 224C | 2020-10-21 | Yes |
| 331-272 | ST CHARLES | 224C | 2021-07-15 | Yes |
| 331-273 | LEMONT | 224C | 2021-06-09 | Yes |
| 331-282 | HINSDALE | 224C | 2021-12-10 | Yes |
| 331-297 | BATAVIA | 224C | 2023-08-09 | Yes |
| 331-298 | NAPERVILLE | 224C | 2023-08-09 | Yes |
| 331-306 | DOWNERSGRV | 224C | 2023-09-19 | Yes |
| 331-319 | AURORA | 224C | 2024-01-24 | Yes |
| 331-320 | BARTLETT | 224C | 2024-01-30 | Yes |
| 331-322 | LOMBARD | 224C | 2024-02-08 | Yes |
| 331-323 | GLEN ELLYN | 224C | 2024-02-08 | Yes |
| 331-324 | YORKVILLE | 224C | 2024-03-13 | Yes |
| 331-326 | DOWNERSGRV | 224C | 2024-03-28 | Yes |
| 331-329 | AURORA | 224C | 2025-01-08 | Yes |
| 331-331 | AURORA | 224C | 2025-08-21 | Yes |
| 331-334 | BATAVIA | 224C | 2021-06-02 | Yes |
| 331-340 | ITASCA | 224C | 2025-11-05 | Yes |
| 331-341 | PLANO | 224C | 2021-03-30 | Yes |
| 331-343 | DOWNERSGRV | 224C | 2023-01-13 | Yes |
| 331-344 | W CHICAGO | 224C | 2026-02-02 | Yes |
| 331-347 | WHEATON | 224C | 2026-07-28 | Yes |
| 331-666 | AURORA | 224C | 2017-09-29 | Yes |
| 331-716 | WHEATON | 224C | 2016-01-18 | Yes |
| 331-771 | ST CHARLES | 224C | 2016-02-10 | Yes |
| 331-800 | W CHICAGO | 224C | 2017-09-29 | Yes |
| 331-850 | BIG ROCK | 224C | 2021-03-30 | Yes |
| 331-871 | W CHICAGO | 224C | 2016-02-17 | 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.