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
510-728 HAYWARD 9740 — —
510-729 OKLD TRNID 9740 — Yes
510-732 HAYWARD 9740 — Yes
510-733 HAYWARD 9740 — —
510-735 OKLD MN-PD 9740 — Yes
510-739 FRNK MAIN 9740 — Yes
510-741 ELSBR-PINL 9740 — —
510-742 FRNK MAIN 9740 — —
510-744 FRNK MAIN 9740 — Yes
510-745 FRNK MAIN 9740 — Yes
510-747 OKLD ALMD 9740 — Yes
510-748 OKLD ALMD 9740 — —
510-749 OKLD ALMD 9740 — —
510-752 OKLD MN-PD 9740 — —
510-758 ELSBR-PINL 9740 — —
510-762 OKLD MN-PD 9740 — —
510-763 OKLD MN-PD 9740 — —
510-765 ELSBR-PINL 9740 — —
510-769 OKLD ALMD 9740 — —
510-770 FRNK OLIVR 9740 — Yes
510-777 OKLD TRNID 9740 — Yes
510-780 HAYWARD 9740 — Yes
510-781 HAYWARD 9740 — Yes
510-782 HAYWARD 9740 — —
510-783 HAYWARD 9740 — —
510-784 HAYWARD 9740 — —
510-785 HAYWARD 9740 — —
510-786 HAYWARD 9740 — Yes
510-787 CROCKETT 9740 — Yes
510-790 FRNK MAIN 9740 — —
510-791 FRNK MAIN 9740 — —
510-792 FRNK MAIN 9740 — —
510-793 FRNK MAIN 9740 — —
510-794 FRNK MAIN 9740 — —
510-795 FRNK MAIN 9740 — —
510-796 FRNK MAIN 9740 — —
510-797 FRNK MAIN 9740 — —
510-799 HRCUL-RODE 9740 — —
510-808 OKLD MN-PD 9740 — Yes
510-814 OKLD ALMD 9740 — —
510-817 OKLD MN-PD 9740 — Yes
510-818 FRNK MAIN 9740 — —
510-832 OKLD MN-PD 9740 — Yes
510-834 OKLD MN-PD 9740 — —
510-835 OKLD MN-PD 9740 — —
510-836 OKLD MN-PD 9740 — Yes
510-839 OKLD MN-PD 9740 — —
510-841 OKLD BKLY 9740 — —
510-843 OKLD BKLY 9740 — —
510-845 OKLD BKLY 9740 — —
510-848 OKLD BKLY 9740 — —
510-849 OKLD BKLY 9740 — Yes
510-864 OKLD ALMD 9740 — —
510-865 OKLD ALMD 9740 — —
510-869 OKLD MN-PD 9740 — Yes
510-873 OKLD MN-PD 9740 — Yes
510-874 OKLD MN-PD 9740 — Yes
510-881 HAYWARD 9740 — Yes
510-883 OKLD BKLY 9740 — Yes
510-885 HAYWARD 9740 — —
510-886 HAYWARD 9740 — —
510-887 HAYWARD 9740 — —
510-888 HAYWARD 9740 — —
510-889 HAYWARD 9740 — Yes
510-891 OKLD MN-PD 9740 — Yes
510-893 OKLD MN-PD 9740 — —
510-895 OKLD TRNID 9740 — —
510-922 OKLD MN-PD 9740 — Yes
510-923 OKLD MN-PD 9740 — —
510-936 FRNK MAIN 9740 — Yes
510-964 ELSBR-PINL 9740 — Yes
510-965 RICHMOND 9740 — Yes
510-970 RICHMOND 9740 — —
510-979 FRNK OLIVR 9740 — Yes
510-981 OKLD BKLY 9740 — Yes
510-985 OKLD MN-PD 9740 — Yes
510-986 OKLD MN-PD 9740 — Yes
510-987 OKLD MN-PD 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.