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
510-204 OKLD BKLY 9740 — —
510-208 OKLD MN-PD 9740 — —
510-215 RICHMOND 9740 — —
510-222 ELSBR-PINL 9740 — —
510-223 ELSBR-PINL 9740 — —
510-226 FRNK OLIVR 9740 — —
510-229 OKLD BKLY 9740 — Yes
510-231 RICHMOND 9740 — —
510-232 RICHMOND 9740 — —
510-233 RICHMOND 9740 — —
510-234 RICHMOND 9740 — —
510-235 RICHMOND 9740 — —
510-236 RICHMOND 9740 — —
510-237 RICHMOND 9740 — —
510-238 OKLD MN-PD 9740 — —
510-242 RICHMOND 9740 — —
510-243 ELSBR-PINL 9740 — Yes
510-245 HRCUL-RODE 9740 — —
510-247 HAYWARD 9740 — Yes
510-249 FRNK OLIVR 9740 — —
510-251 OKLD MN-PD 9740 — —
510-252 FRNK OLIVR 9740 — —
510-258 HAYWARD 9740 — Yes
510-259 HAYWARD 9740 — Yes
510-261 OKLD FRTVL 9740 — —
510-262 ELSBR-PINL 9740 — Yes
510-263 OKLD ALMD 9740 — Yes
510-264 HAYWARD 9740 — Yes
510-265 HAYWARD 9740 — Yes
510-266 HAYWARD 9740 — Yes
510-267 OKLD MN-PD 9740 — —
510-268 OKLD MN-PD 9740 — Yes
510-271 OKLD MN-PD 9740 — —
510-272 OKLD MN-PD 9740 — Yes
510-273 OKLD MN-PD 9740 — —
510-276 HAYWARD 9740 — —
510-278 HAYWARD 9740 — —
510-284 FRNK MAIN 9740 — Yes
510-286 OKLD MN-PD 9740 — —
510-287 OKLD MN-PD 9740 — Yes
510-292 OKLD BKLY 9740 — Yes
510-293 HAYWARD 9740 — Yes
510-297 OKLD TRNID 9740 — —
510-302 OKLD MN-PD 9740 — Yes
510-307 RICHMOND 9740 — Yes
510-317 HAYWARD 9740 — —
510-324 FRNK GRNLF 9740 — Yes
510-336 OKLD FRTVL 9740 — Yes
510-337 OKLD ALMD 9740 — Yes
510-338 OKLD MN-PD 9740 — Yes
510-339 OKLD MN-PD 9740 — —
510-346 OKLD TRNID 9740 — Yes
510-347 OKLD TRNID 9740 — Yes
510-351 OKLD TRNID 9740 — —
510-352 OKLD TRNID 9740 — —
510-353 FRNK OLIVR 9740 — Yes
510-354 FRNK OLIVR 9740 — —
510-356 OKLD BKLY 9740 2007-11-28 Yes
510-357 OKLD TRNID 9740 — —
510-360 FRNK OLIVR 9740 — —
510-374 RICHMOND 9740 — Yes
510-382 OKLD TRNID 9740 — —
510-383 OKLD TRNID 9740 — Yes
510-408 ELSBR-PINL 9740 2009-11-25 Yes
510-412 RICHMOND 9740 — —
510-413 FRNK OLIVR 9740 — Yes
510-419 OKLD MN-PD 9740 — Yes
510-420 OKLD MN-PD 9740 — —
510-425 OKLD TRNID 9740 — Yes
510-428 OKLD MN-PD 9740 — —
510-429 FRNK GRNLF 9740 — —
510-430 OKLD TRNID 9740 — —
510-433 OKLD MN-PD 9740 — Yes
510-434 OKLD FRTVL 9740 — Yes
510-436 OKLD FRTVL 9740 — —
510-437 OKLD FRTVL 9740 — Yes
510-438 FRNK OLIVR 9740 — Yes
510-440 FRNK OLIVR 9740 — Yes
510-441 FRNK GRNLF 9740 — Yes
510-444 OKLD MN-PD 9740 — Yes
510-445 FRNK OLIVR 9740 — Yes
510-446 OKLD MN-PD 9740 — Yes
510-450 OKLD MN-PD 9740 — —
510-451 OKLD MN-PD 9740 — —
510-452 OKLD MN-PD 9740 — Yes
510-454 OKLD TRNID 9740 2012-11-30 Yes
510-464 OKLD MN-PD 9740 — Yes
510-465 OKLD MN-PD 9740 — —
510-466 OKLD MN-PD 9740 — Yes
510-471 FRNK GRNLF 9740 — —
510-475 FRNK GRNLF 9740 — —
510-476 FRNK GRNLF 9740 — Yes
510-477 FRNK GRNLF 9740 — —
510-481 HAYWARD 9740 — —
510-482 OKLD FRTVL 9740 — —
510-483 OKLD TRNID 9740 — —
510-486 OKLD BKLY 9740 — —
510-487 FRNK GRNLF 9740 — —
510-489 FRNK GRNLF 9740 — —
510-490 FRNK OLIVR 9740 — —

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.