All assignees
800 prefixes in 310 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 310-300 | BEVERLYHLS | 7229 | — | Yes |
| 310-301 | SNMN MRVS | 2319 | — | — |
| 310-302 | SNMN MRVS | 2319 | — | Yes |
| 310-303 | REDONDO | 7480 | — | Yes |
| 310-304 | LOMITA | 649C | 2023-06-26 | Yes |
| 310-305 | SNMN MRVS | 2319 | — | — |
| 310-306 | SNMN MRVS | 2319 | — | — |
| 310-307 | W ANGELES | 6529 | 2012-10-02 | Yes |
| 310-308 | CMTN GRDN | 6010 | — | — |
| 310-309 | SNMN SNMN | 7139 | — | Yes |
| 310-310 | SNMN SNMN | 6529 | 2006-11-07 | Yes |
| 310-311 | XXXXXXXXXX | MULT | — | — |
| 310-312 | W ANGELES | 2319 | — | — |
| 310-313 | SNMN MRVS | 2319 | — | — |
| 310-314 | SNMN SNMN | 2319 | — | — |
| 310-315 | SNMN SNMN | 2319 | — | — |
| 310-316 | REDONDO | 2319 | — | — |
| 310-317 | MALIBU | 2319 | — | Yes |
| 310-318 | REDONDO | 2319 | — | Yes |
| 310-319 | SNMN SNMN | 2319 | — | — |
| 310-320 | TORRANCE | 9740 | — | — |
| 310-321 | EL SEGUNDO | 671J | — | Yes |
| 310-322 | EL SEGUNDO | 9740 | — | — |
| 310-323 | CMTN GRDN | 9740 | — | — |
| 310-324 | CMTN GRDN | 9740 | — | — |
| 310-325 | LOMITA | 9740 | — | — |
| 310-326 | LOMITA | 9740 | — | — |
| 310-327 | CMTN GRDN | 9740 | — | — |
| 310-328 | TORRANCE | 9740 | — | — |
| 310-329 | CMTN GRDN | 9740 | — | — |
| 310-330 | INGLEWOOD | 9740 | — | Yes |
| 310-331 | HAWTHORNE | 9740 | — | Yes |
| 310-332 | HAWTHORNE | 9740 | — | — |
| 310-333 | EL SEGUNDO | 9740 | — | — |
| 310-334 | EL SEGUNDO | 9740 | — | Yes |
| 310-335 | EL SEGUNDO | 9740 | — | — |
| 310-336 | EL SEGUNDO | 9740 | — | — |
| 310-337 | INGLEWOOD | 9740 | — | — |
| 310-338 | INGLEWOOD | 9740 | — | — |
| 310-339 | SNMN MRVS | 6006 | — | — |
| 310-340 | HAWTHORNE | 6010 | 2017-01-16 | Yes |
| 310-341 | EL SEGUNDO | 7139 | — | Yes |
| 310-342 | INGLEWOOD | 9740 | — | — |
| 310-343 | EL SEGUNDO | 7139 | — | Yes |
| 310-344 | CMTN GRDN | 6010 | 2001-04-19 | — |
| 310-345 | CMTN GRDN | 6529 | — | Yes |
| 310-346 | CMTN GRDN | 6529 | — | Yes |
| 310-347 | TORRANCE | 6010 | — | Yes |
| 310-348 | INGLEWOOD | 9740 | — | — |
| 310-349 | HAWTHORNE | 9740 | — | Yes |
| 310-350 | TORRANCE | 899D | 2001-12-26 | Yes |
| 310-351 | SNMN MRVS | 6006 | — | — |
| 310-352 | CMTN GRDN | 9740 | — | Yes |
| 310-353 | CMTN GRDN | 9740 | — | Yes |
| 310-354 | CMTN GRDN | 9740 | — | — |
| 310-355 | HAWTHORNE | 9740 | — | Yes |
| 310-356 | EL SEGUNDO | 8826 | — | Yes |
| 310-357 | TORRANCE | 7139 | — | Yes |
| 310-358 | BEVERLYHLS | 9740 | — | — |
| 310-359 | MALIBU | 6529 | — | Yes |
| 310-360 | BEVERLYHLS | 9740 | — | — |
| 310-361 | CMTN CMTN | 649C | — | — |
| 310-362 | BEVERLYHLS | 649C | — | — |
| 310-363 | HAWTHORNE | 9740 | — | Yes |
| 310-364 | EL SEGUNDO | 9740 | — | — |
| 310-365 | CMTN GRDN | 6006 | — | — |
| 310-366 | CMTN GRDN | 9740 | — | — |
| 310-367 | SNMN MRVS | 6006 | — | — |
| 310-368 | CMTN GRDN | 6630 | — | — |
| 310-369 | BEVERLYHLS | 7139 | — | — |
| 310-370 | REDONDO | 2319 | — | — |
| 310-371 | REDONDO | 2319 | — | — |
| 310-372 | REDONDO | 2319 | — | — |
| 310-373 | REDONDO | 2319 | — | — |
| 310-374 | REDONDO | 2319 | — | — |
| 310-375 | REDONDO | 2319 | — | — |
| 310-376 | REDONDO | 2319 | — | — |
| 310-377 | REDONDO | 2319 | — | — |
| 310-378 | REDONDO | 2319 | — | — |
| 310-379 | REDONDO | 2319 | — | — |
| 310-380 | CMTN GRDN | 9740 | — | Yes |
| 310-381 | TORRANCE | 9740 | — | Yes |
| 310-382 | SNMN SNMN | 7718 | — | Yes |
| 310-383 | SNMN MRVS | 6010 | — | — |
| 310-384 | CULVERCITY | 6010 | — | — |
| 310-385 | BEVERLYHLS | 9740 | — | — |
| 310-386 | CMTN GRDN | 6006 | — | — |
| 310-387 | CMTN GRDN | 6006 | — | — |
| 310-388 | BEVERLYHLS | 649C | — | Yes |
| 310-389 | CMTN GRDN | 9748 | — | — |
| 310-390 | SNMN MRVS | 2319 | — | — |
| 310-391 | SNMN MRVS | 2319 | — | — |
| 310-392 | SNMN SNMN | 2319 | — | — |
| 310-393 | SNMN SNMN | 2319 | — | — |
| 310-394 | SNMN SNMN | 2319 | — | — |
| 310-395 | SNMN SNMN | 2319 | — | — |
| 310-396 | SNMN SNMN | 2319 | — | — |
| 310-397 | SNMN MRVS | 2319 | — | — |
| 310-398 | SNMN MRVS | 2319 | — | — |
| 310-399 | SNMN SNMN | 2319 | — | — |
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.