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18 prefixes in 337 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 337-255 | LAFAYETTE | 150C | 2001-08-23 | — |
| 337-292 | LK CHARLES | 150C | 2001-11-01 | Yes |
| 337-300 | ELTON | 150C | 2004-03-19 | Yes |
| 337-320 | OBERLIN | 150C | 2004-03-19 | Yes |
| 337-348 | DE RIDDER | 150C | 2002-12-30 | Yes |
| 337-387 | WELSH | 150C | 2004-03-19 | Yes |
| 337-389 | OBERLIN | 150C | 2004-03-19 | Yes |
| 337-390 | KINDER | 150C | 2004-03-19 | Yes |
| 337-424 | LEESVILLE | 150C | 2002-12-30 | Yes |
| 337-567 | BREAUX BDG | 150C | 2021-10-19 | Yes |
| 337-574 | DE RIDDER | 150C | 2022-02-24 | Yes |
| 337-618 | BREAUX BDG | 150C | 2023-10-05 | Yes |
| 337-630 | CAMERON | 150C | 2005-09-02 | Yes |
| 337-693 | LAFAYETTE | 150C | — | Yes |
| 337-739 | LAFAYETTE | 150C | — | Yes |
| 337-780 | LAFAYETTE | 150C | 2001-10-26 | Yes |
| 337-781 | LAFAYETTE | 150C | — | Yes |
| 337-787 | LAFAYETTE | 150C | — | 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.