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22 prefixes in 337 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 337-253 | NEW IBERIA | 318J | — | — |
| 337-283 | ABBEVILLE | 318J | 2017-12-05 | Yes |
| 337-285 | KAPLAN | 318J | — | Yes |
| 337-361 | ERATH | 318J | 2017-12-14 | Yes |
| 337-398 | CROWLEY | 318J | 2017-12-14 | Yes |
| 337-412 | LAFAYETTE | 318J | — | Yes |
| 337-434 | HENDERSON | 318J | — | Yes |
| 337-442 | BREAUX BDG | 318J | — | Yes |
| 337-444 | PARKS | 318J | — | Yes |
| 337-445 | BROUSSARD | 318J | — | Yes |
| 337-449 | ARNAUDVL | 318J | — | Yes |
| 337-451 | YOUNGSVL | 318J | — | Yes |
| 337-454 | CECELIA | 318J | — | Yes |
| 337-456 | LAFAYETTE | 318J | — | Yes |
| 337-490 | DELCAMBRE | 318J | — | Yes |
| 337-504 | LAFAYETTE | 318J | — | Yes |
| 337-524 | LAFAYETTE | 318J | — | Yes |
| 337-565 | CARENCRO | 318J | — | Yes |
| 337-907 | FRANKLIN | 318J | — | Yes |
| 337-918 | ERATH | 318J | — | Yes |
| 337-935 | DUSON | 318J | — | Yes |
| 337-944 | LOREAUVL | 318J | — | 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.