All assignees
27 prefixes in 353 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 353-200 | MADISON | 225C | 2025-10-03 | Yes |
| 353-201 | MADISON | 700J | 2025-12-22 | Yes |
| 353-202 | HIGHLAND | 6529 | 2026-05-08 | Yes |
| 353-211 | XXXXXXXXXX | MULT | — | — |
| 353-222 | LONE ROCK | 225C | 2025-08-29 | Yes |
| 353-311 | XXXXXXXXXX | MULT | — | — |
| 353-333 | MONTELLO | 225C | 2025-08-29 | Yes |
| 353-353 | BELLEVILLE | 225C | 2025-12-26 | Yes |
| 353-411 | XXXXXXXXXX | MULT | — | — |
| 353-444 | BLOOM CITY | 225C | 2025-08-29 | Yes |
| 353-465 | MADISON | 883K | 2026-06-04 | Yes |
| 353-511 | XXXXXXXXXX | MULT | — | — |
| 353-529 | DE FOREST | 225C | 2025-12-26 | Yes |
| 353-555 | DIR ASST | MULT | — | — |
| 353-611 | XXXXXXXXXX | MULT | — | — |
| 353-666 | CENTERVL | 225C | 2025-08-29 | Yes |
| 353-700 | — | — | ||
| 353-711 | XXXXXXXXXX | MULT | — | — |
| 353-777 | MAZOMANIE | 225C | 2025-08-29 | Yes |
| 353-811 | XXXXXXXXXX | MULT | — | — |
| 353-888 | ALBANY | 225C | 2025-08-29 | Yes |
| 353-911 | XXXXXXXXXX | MULT | — | — |
| 353-950 | — | — | ||
| 353-958 | — | — | ||
| 353-959 | — | — | ||
| 353-976 | — | — | ||
| 353-999 | ITHACA | 225C | 2025-08-21 | 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.