NRNumberResearch Membership · Data 09/17/2026

← Area code 510

All assignees

800 prefixes in 510 · initial assignments from the NANPA CO code file, 09/17/2026

Prefixes held by all assignees in area code 510
NPA-NXXRate centerOCNAssignedPooled
510-500 OKLD FRTVL 7229 — Yes
510-501 OKLD MN-PD 6010 — —
510-502 OKLD MN-PD 6010 — —
510-503 OKLD MN-PD 9262 — —
510-504 OKLD MN-PD 6006 — —
510-505 FRNK MAIN 9740 — Yes
510-506 OKLD MN-PD 6006 — Yes
510-507 OKLD MN-PD 6006 — Yes
510-508 OKLD MN-PD 6010 — —
510-509 FRNK MAIN 8826 2010-07-06 Yes
510-510 FRNK MAIN 0051 2024-09-12 —
510-511 XXXXXXXXXX MULT — —
510-512 HAYWARD 6529 — Yes
510-513 FRNK MAIN 6529 2016-08-30 Yes
510-514 HAYWARD 373F 2016-09-19 Yes
510-515 OKLD MN-PD 6630 — —
510-516 FRNK MAIN 981E 2010-09-03 Yes
510-517 OKLD MN-PD 6010 — —
510-518 FRNK MAIN 373F — Yes
510-519 OKLD ALMD 6006 2017-08-07 Yes
510-520 OKLD MN-PD 6010 — —
510-521 OKLD ALMD 9740 — —
510-522 OKLD ALMD 9740 — —
510-523 OKLD ALMD 9740 — —
510-524 OKLD BKLY 9740 — —
510-525 OKLD BKLY 9740 — —
510-526 OKLD BKLY 9740 — —
510-527 OKLD BKLY 9740 — —
510-528 OKLD BKLY 9740 — —
510-529 OKLD BKLY 9740 — Yes
510-530 OKLD FRTVL 9740 — —
510-531 OKLD FRTVL 9740 — —
510-532 OKLD FRTVL 9740 — —
510-533 OKLD FRTVL 9740 — —
510-534 OKLD FRTVL 9740 — —
510-535 OKLD FRTVL 9740 — —
510-536 OKLD FRTVL 9740 — —
510-537 HAYWARD 9740 — —
510-538 HAYWARD 9740 — —
510-539 OKLD MN-PD 9262 — —
510-540 OKLD BKLY 9740 — —
510-541 OKLD MN-PD 6010 — —
510-542 OKLD BKLY 7229 — Yes
510-543 OKLD MN-PD 5562 — Yes
510-544 OKLD TRNID 649C — Yes
510-545 OKLD ALMD 7229 — Yes
510-546 HAYWARD 624H 2024-01-04 Yes
510-547 OKLD MN-PD 9740 — —
510-548 OKLD BKLY 9740 — —
510-549 OKLD BKLY 9740 — Yes
510-550 OKLD MN-PD 8826 — Yes
510-551 OKLD MN-PD 5562 — Yes
510-552 FRNK MAIN 6006 2001-06-25 Yes
510-553 OKLD TRNID 9740 — —
510-554 HAYWARD 6967 — —
510-555 DIR ASST MULT — —
510-556 FRNK MAIN 8826 2014-05-05 Yes
510-557 FRNK MAIN 6529 2001-05-17 Yes
510-558 OKLD BKLY 9740 — Yes
510-559 OKLD BKLY 9740 — Yes
510-560 OKLD TRNID 394L 2014-07-14 Yes
510-561 OKLD FRTVL 6010 2017-04-14 Yes
510-562 OKLD TRNID 9740 — —
510-563 OKLD TRNID 9740 — Yes
510-564 OKLD TRNID 7229 — Yes
510-565 FRNK MAIN 6529 — Yes
510-566 HAYWARD 6006 — Yes
510-567 OKLD TRNID 9740 — Yes
510-568 OKLD TRNID 9740 — —
510-569 OKLD TRNID 9740 — —
510-570 OKLD BKLY 6529 2016-09-26 Yes
510-571 HAYWARD 6010 2017-08-16 Yes
510-572 FRNK OLIVR 7240 — —
510-573 FRNK OLIVR 394L — Yes
510-574 FRNK MAIN 9740 — Yes
510-575 OKLD MN-PD 5562 — Yes
510-576 HAYWARD 7229 — Yes
510-577 OKLD TRNID 9740 — —
510-578 FRNK MAIN 7229 — Yes
510-579 FRNK MAIN 6010 — —
510-580 FRNK OLIVR 7229 — —
510-581 HAYWARD 9740 — —
510-582 HAYWARD 9740 — —
510-583 HAYWARD 9740 — —
510-584 HAYWARD 7229 — Yes
510-585 FRNK MAIN 671J — Yes
510-586 HAYWARD 394L — Yes
510-587 OKLD MN-PD 9740 — Yes
510-588 OKLD MN-PD 649C — Yes
510-589 HAYWARD 6010 — —
510-590 OKLD MN-PD 6010 — Yes
510-591 FRNK MAIN 6010 2024-02-20 Yes
510-592 HRCUL-RODE 8826 — Yes
510-593 OKLD MN-PD 5562 — Yes
510-594 OKLD MN-PD 9740 — —
510-595 OKLD MN-PD 9740 — —
510-596 OKLD MN-PD 9740 — Yes
510-597 OKLD MN-PD 9740 — Yes
510-598 FRNK MAIN 6529 2013-01-18 Yes
510-599 OKLD MN-PD 6010 — —

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.