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16 prefixes in 224 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 224-318 | ARLIGTNHTS | 318J | 2013-01-03 | Yes |
| 224-326 | NORTHBROOK | 318J | 2013-04-23 | Yes |
| 224-333 | ALGONQUIN | 318J | 2005-02-17 | Yes |
| 224-338 | ROUND LAKE | 318J | 2006-10-12 | Yes |
| 224-398 | ARLIGTNHTS | 318J | 2021-08-10 | Yes |
| 224-408 | WILMETTE | 318J | 2013-04-30 | Yes |
| 224-470 | SKOKIE | 318J | 2014-09-16 | Yes |
| 224-475 | MUNDELEIN | 318J | 2007-06-07 | Yes |
| 224-530 | PLATO CTR | 318J | 2015-03-24 | Yes |
| 224-535 | ELGIN | 318J | 2005-02-24 | Yes |
| 224-610 | WAUKEGAN | 318J | 2005-02-02 | Yes |
| 224-676 | WHEELING | 318J | 2006-09-15 | Yes |
| 224-714 | EVANSTON | 318J | 2014-10-27 | Yes |
| 224-757 | ROUND LAKE | 318J | 2005-02-28 | Yes |
| 224-908 | FOX LAKE | 318J | 2015-03-06 | Yes |
| 224-985 | PARK RIDGE | 318J | 2015-08-28 | 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.