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8 prefixes in 223 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 223-210 | DENVER | 318J | 2018-09-17 | Yes |
| 223-255 | GETTYSBURG | 318J | 2020-10-01 | Yes |
| 223-258 | LITITZ | 318J | 2021-04-14 | Yes |
| 223-291 | GLEN ROCK | 318J | 2022-06-07 | Yes |
| 223-298 | HALIFAX | 318J | 2022-09-14 | Yes |
| 223-301 | REEDSVILLE | 318J | 2022-09-29 | Yes |
| 223-304 | NEWVILLE | 318J | 2022-09-29 | Yes |
| 223-309 | SPRING GRV | 318J | 2023-03-16 | 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.