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37 prefixes in 510 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 510-275 | ELSBR-PINL | 649C | — | Yes |
| 510-281 | OKLD MN-PD | 649C | — | — |
| 510-288 | OKLD MN-PD | 649C | — | — |
| 510-291 | OKLD MN-PD | 649C | — | Yes |
| 510-319 | FRNK OLIVR | 649C | 2015-12-01 | Yes |
| 510-327 | HRCUL-RODE | 649C | — | Yes |
| 510-330 | HAYWARD | 649C | 2015-12-28 | Yes |
| 510-335 | FRNK MAIN | 649C | — | Yes |
| 510-369 | RICHMOND | 649C | 2016-02-04 | Yes |
| 510-372 | HAYWARD | 649C | — | Yes |
| 510-373 | OKLD ALMD | 649C | — | Yes |
| 510-380 | OKLD MN-PD | 649C | — | Yes |
| 510-399 | FRNK MAIN | 649C | 2016-05-06 | Yes |
| 510-405 | FRNK MAIN | 649C | — | — |
| 510-439 | RICHMOND | 649C | — | Yes |
| 510-462 | FRNK GRNLF | 649C | 2016-05-04 | Yes |
| 510-544 | OKLD TRNID | 649C | — | Yes |
| 510-588 | OKLD MN-PD | 649C | — | Yes |
| 510-600 | HAYWARD | 649C | — | Yes |
| 510-617 | HRCUL-RODE | 649C | 2018-08-31 | Yes |
| 510-650 | ELSBR-PINL | 649C | 2017-12-21 | Yes |
| 510-674 | HAYWARD | 649C | 2014-11-03 | Yes |
| 510-694 | OKLD ALMD | 649C | 2014-12-08 | Yes |
| 510-721 | OKLD MN-PD | 649C | 2021-11-18 | Yes |
| 510-751 | HAYWARD | 649C | — | Yes |
| 510-800 | OKLD ALMD | 649C | — | Yes |
| 510-880 | HAYWARD | 649C | — | Yes |
| 510-892 | HAYWARD | 649C | — | Yes |
| 510-900 | OKLD BKLY | 649C | — | Yes |
| 510-902 | FRNK MAIN | 649C | 2018-12-03 | Yes |
| 510-906 | OKLD ALMD | 649C | 2016-07-15 | Yes |
| 510-947 | OKLD MN-PD | 649C | — | Yes |
| 510-949 | HRCUL-RODE | 649C | 2016-07-15 | Yes |
| 510-954 | HAYWARD | 649C | 2018-12-03 | Yes |
| 510-990 | OKLD BKLY | 649C | — | Yes |
| 510-991 | FRNK GRNLF | 649C | — | Yes |
| 510-999 | HAYWARD | 649C | — | 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.