All assignees
577 prefixes in 858 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 858-300 | SNDG LVTA | 671J | — | Yes |
| 858-301 | EL CAJON | 197D | 2020-06-11 | Yes |
| 858-302 | SNDG LVTA | 394L | 2017-10-03 | Yes |
| 858-303 | LA JOLLA | 394L | — | Yes |
| 858-304 | RNCHOBRNDO | 7421 | — | Yes |
| 858-305 | SNDG MRMS | 6529 | 2021-02-17 | Yes |
| 858-306 | DEL MAR | 073H | — | Yes |
| 858-307 | SNDG MRMS | 9740 | 2017-11-22 | Yes |
| 858-308 | SNDG LVTA | 6529 | 2021-03-10 | Yes |
| 858-309 | SNDG LVTA | 7718 | — | Yes |
| 858-310 | RNCHOSANFE | 506J | — | Yes |
| 858-311 | XXXXXXXXXX | MULT | — | — |
| 858-312 | RNCHOBRNDO | 394L | — | Yes |
| 858-313 | DEL MAR | 6529 | 2021-03-11 | Yes |
| 858-314 | DEL MAR | 7147 | — | Yes |
| 858-315 | CHULAVISTA | 6010 | 2021-07-01 | Yes |
| 858-316 | CHULAVISTA | 6010 | 2021-07-01 | Yes |
| 858-317 | DULZURA | 939H | 2023-08-10 | Yes |
| 858-318 | CHULAVISTA | 671J | 2022-05-27 | Yes |
| 858-319 | LA JOLLA | 6529 | 2021-03-24 | Yes |
| 858-320 | LA JOLLA | 9740 | — | — |
| 858-321 | SNDG SNDG | 829J | 2022-06-30 | Yes |
| 858-322 | SNDG MRMS | 6006 | 2015-11-13 | Yes |
| 858-323 | CHULAVISTA | 8826 | 2021-07-22 | Yes |
| 858-324 | RNCHOPNQTS | 7147 | — | Yes |
| 858-325 | SNDG LVTA | 624H | 2021-10-11 | Yes |
| 858-326 | CHULAVISTA | 981E | 2022-10-04 | Yes |
| 858-327 | SNDG SNDG | 732J | — | Yes |
| 858-328 | LA MESA | 6010 | 2021-10-26 | Yes |
| 858-329 | SNDG MRMS | 981E | 2016-06-14 | Yes |
| 858-330 | RNCHOPNQTS | 6529 | 2021-11-18 | Yes |
| 858-331 | CHULAVISTA | 6006 | 2022-10-10 | Yes |
| 858-332 | LA JOLLA | 7718 | — | Yes |
| 858-333 | LA JOLLA | 981E | — | Yes |
| 858-334 | LA JOLLA | 9740 | 2001-02-15 | Yes |
| 858-335 | POWAY | 6010 | — | — |
| 858-336 | LA JOLLA | 6010 | — | — |
| 858-337 | LA JOLLA | 6010 | — | — |
| 858-338 | HARBSNALPN | 649C | 2022-09-08 | Yes |
| 858-339 | EL CAJON | 6006 | 2022-11-04 | Yes |
| 858-340 | LA JOLLA | 6010 | 2023-03-10 | Yes |
| 858-341 | CHULAVISTA | 6529 | 2022-10-28 | Yes |
| 858-342 | DEL MAR | 6010 | — | — |
| 858-343 | LA JOLLA | 6010 | 2022-12-06 | Yes |
| 858-344 | LA JOLLA | 6010 | 2001-04-24 | — |
| 858-345 | DEL MAR | 394L | — | Yes |
| 858-346 | LA JOLLA | 8826 | — | Yes |
| 858-347 | DEL MAR | 6630 | — | — |
| 858-348 | SNDG MRMS | 7240 | — | Yes |
| 858-349 | LA JOLLA | 6010 | — | — |
| 858-350 | DEL MAR | 9740 | — | — |
| 858-351 | SNDG SNDG | 321J | 2022-10-20 | Yes |
| 858-352 | LA JOLLA | 7240 | — | Yes |
| 858-353 | DEL MAR | 6010 | — | Yes |
| 858-354 | LA JOLLA | 6006 | — | — |
| 858-355 | SNDG SNDG | 965H | 2021-09-22 | Yes |
| 858-356 | DEL MAR | 671J | — | Yes |
| 858-357 | SNDG MRMS | 7718 | — | Yes |
| 858-358 | EL CAJON | 649C | 2020-11-06 | Yes |
| 858-359 | LA JOLLA | 9748 | — | — |
| 858-360 | RNCHOPNQTS | 9740 | — | Yes |
| 858-361 | LA JOLLA | 6010 | — | — |
| 858-362 | LA JOLLA | 7240 | — | — |
| 858-363 | JACUMBA | 939H | 2022-11-03 | Yes |
| 858-364 | RNCHOPNQTS | 7894 | — | — |
| 858-365 | RNCHOPNQTS | 649C | — | Yes |
| 858-366 | LA JOLLA | 7240 | — | Yes |
| 858-367 | RNCHOSANFE | 515J | — | Yes |
| 858-368 | SNDG MRMS | 515J | — | Yes |
| 858-369 | DEL MAR | 7421 | — | Yes |
| 858-370 | LA JOLLA | 6010 | 2023-05-03 | Yes |
| 858-371 | RNCHOPNQTS | 394L | — | Yes |
| 858-372 | LA JOLLA | 6010 | 2023-05-03 | Yes |
| 858-373 | LA JOLLA | 7240 | — | Yes |
| 858-374 | LA JOLLA | 6010 | 2023-08-03 | Yes |
| 858-375 | POWAY | 8826 | — | Yes |
| 858-376 | RNCHOBRNDO | 671J | — | Yes |
| 858-377 | POWAY | 965H | 2021-07-13 | Yes |
| 858-378 | SNDG MRMS | 6006 | 2014-11-14 | Yes |
| 858-379 | EL CAJON | 981E | 2022-07-21 | Yes |
| 858-380 | SNDG LVTA | 7718 | — | Yes |
| 858-381 | RNCHOSANFE | 7147 | — | Yes |
| 858-382 | POWAY | 6010 | — | — |
| 858-383 | SNDG SNDG | 7147 | 2023-08-22 | Yes |
| 858-384 | SNDG LVTA | 700J | — | Yes |
| 858-385 | RNCHOBRNDO | 9740 | — | — |
| 858-386 | POWAY | 7718 | — | Yes |
| 858-387 | LA MESA | 649C | 2023-10-02 | Yes |
| 858-388 | EL CAJON | 965H | 2019-03-19 | Yes |
| 858-389 | CHULAVISTA | 6529 | 2023-10-10 | Yes |
| 858-390 | LA JOLLA | 7147 | 2023-11-16 | Yes |
| 858-391 | POWAY | 9740 | — | Yes |
| 858-392 | SNDG LVTA | 939H | 2024-01-02 | Yes |
| 858-393 | DEL MAR | 939H | 2024-01-02 | Yes |
| 858-394 | SNDG LVTA | 598J | 2024-01-10 | Yes |
| 858-395 | POWAY | 6006 | — | — |
| 858-396 | LA JOLLA | 6010 | 2024-01-22 | Yes |
| 858-397 | SNDG MRMS | 394L | — | Yes |
| 858-398 | SNDG MRMS | 649C | 2023-01-20 | Yes |
| 858-399 | CORONADO | 965H | 2021-01-27 | 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.