NRNumberResearch Membership · Data 09/17/2026

← Area code 510

PACIFIC BELL

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

Prefixes held by PACIFIC BELL in area code 510
NPA-NXXRate centerOCNAssignedPooled
510-492 FRNK OLIVR 9740 — Yes
510-494 FRNK MAIN 9740 — —
510-495 OKLD BKLY 9740 — Yes
510-498 FRNK OLIVR 9740 — Yes
510-505 FRNK MAIN 9740 — Yes
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 — —
510-540 OKLD BKLY 9740 — —
510-547 OKLD MN-PD 9740 — —
510-548 OKLD BKLY 9740 — —
510-549 OKLD BKLY 9740 — Yes
510-553 OKLD TRNID 9740 — —
510-558 OKLD BKLY 9740 — Yes
510-559 OKLD BKLY 9740 — Yes
510-562 OKLD TRNID 9740 — —
510-563 OKLD TRNID 9740 — Yes
510-567 OKLD TRNID 9740 — Yes
510-568 OKLD TRNID 9740 — —
510-569 OKLD TRNID 9740 — —
510-574 FRNK MAIN 9740 — Yes
510-577 OKLD TRNID 9740 — —
510-581 HAYWARD 9740 — —
510-582 HAYWARD 9740 — —
510-583 HAYWARD 9740 — —
510-587 OKLD MN-PD 9740 — 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
510-601 OKLD MN-PD 9740 — Yes
510-608 FRNK MAIN 9740 — Yes
510-613 OKLD TRNID 9740 — Yes
510-614 OKLD TRNID 9740 — —
510-615 OKLD TRNID 9740 — —
510-618 OKLD TRNID 9740 — Yes
510-620 RICHMOND 9740 — Yes
510-622 OKLD MN-PD 9740 — —
510-623 FRNK OLIVR 9740 — Yes
510-624 FRNK OLIVR 9740 — Yes
510-625 OKLD MN-PD 9740 — —
510-627 OKLD MN-PD 9740 — Yes
510-628 OKLD MN-PD 9740 — Yes
510-632 OKLD TRNID 9740 — —
510-633 OKLD TRNID 9740 — —
510-635 OKLD TRNID 9740 — —
510-636 OKLD TRNID 9740 — Yes
510-637 OKLD MN-PD 9740 — Yes
510-638 OKLD TRNID 9740 — —
510-639 OKLD TRNID 9740 — —
510-642 OKLD BKLY 9740 — —
510-643 OKLD BKLY 9740 — —
510-644 OKLD BKLY 9740 — —
510-645 OKLD MN-PD 9740 — —
510-647 OKLD BKLY 9740 — Yes
510-649 OKLD BKLY 9740 — —
510-651 FRNK OLIVR 9740 — —
510-652 OKLD MN-PD 9740 — —
510-653 OKLD MN-PD 9740 — —
510-654 OKLD MN-PD 9740 — —
510-655 OKLD MN-PD 9740 — —
510-656 FRNK OLIVR 9740 — —
510-657 FRNK OLIVR 9740 — —
510-658 OKLD MN-PD 9740 — —
510-659 FRNK OLIVR 9740 — Yes
510-661 FRNK OLIVR 9740 — Yes
510-663 OKLD MN-PD 9740 — —
510-664 OKLD BKLY 9740 — —
510-665 OKLD BKLY 9740 — Yes
510-666 OKLD BKLY 9740 — Yes
510-667 OKLD TRNID 9740 — Yes
510-668 FRNK OLIVR 9740 — Yes
510-669 ELSBR-PINL 9740 — Yes
510-670 HAYWARD 9740 — —
510-675 FRNK GRNLF 9740 — Yes
510-678 OKLD TRNID 9740 — —
510-683 FRNK OLIVR 9740 — Yes
510-687 FRNK OLIVR 9740 — —
510-690 HAYWARD 9740 — Yes
510-704 OKLD BKLY 9740 — Yes
510-705 OKLD BKLY 9740 — Yes
510-713 FRNK MAIN 9740 — —
510-723 HAYWARD 9740 — Yes
510-724 ELSBR-PINL 9740 — —
510-727 HAYWARD 9740 — 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.