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
510-300 HAYWARD 671J — Yes
510-301 OKLD MN-PD 6006 — —
510-302 OKLD MN-PD 9740 — Yes
510-303 HAYWARD 6010 — —
510-304 FRNK MAIN 6010 — —
510-305 HAYWARD 6010 — —
510-306 OKLD ALMD 5562 — Yes
510-307 RICHMOND 9740 — Yes
510-308 OKLD MN-PD 6630 — —
510-309 ELSBR-PINL 6529 2014-10-24 Yes
510-310 HAYWARD 385L 2026-02-25 Yes
510-311 XXXXXXXXXX MULT — —
510-312 CROCKETT 939H 2023-08-09 Yes
510-313 HRCUL-RODE 7145 — Yes
510-314 HAYWARD 6529 2007-07-02 Yes
510-315 HAYWARD 8826 — —
510-316 OKLD MN-PD 6010 — Yes
510-317 HAYWARD 9740 — —
510-318 OKLD MN-PD 6006 — Yes
510-319 FRNK OLIVR 649C 2015-12-01 Yes
510-320 FRNK MAIN 6010 2013-09-12 Yes
510-321 OKLD MN-PD 6630 — —
510-322 HRCUL-RODE 7229 — Yes
510-323 RICHMOND 7229 — Yes
510-324 FRNK GRNLF 9740 — Yes
510-325 OKLD MN-PD 6010 — —
510-326 OKLD MN-PD 6010 — —
510-327 HRCUL-RODE 649C — Yes
510-328 OKLD FRTVL 6529 2013-01-31 Yes
510-329 HAYWARD 6010 — —
510-330 HAYWARD 649C 2015-12-28 Yes
510-331 HAYWARD 6010 — —
510-332 OKLD MN-PD 6010 — —
510-333 OKLD MN-PD 6010 — —
510-334 RICHMOND 6010 — —
510-335 FRNK MAIN 649C — 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 — —
510-340 HAYWARD 6006 2012-05-04 Yes
510-341 — —
510-342 HAYWARD 671J — Yes
510-343 OKLD TRNID 671J — Yes
510-344 FRNK OLIVR 8826 — Yes
510-345 OKLD BKLY 6529 2016-01-15 Yes
510-346 OKLD TRNID 9740 — Yes
510-347 OKLD TRNID 9740 — Yes
510-348 OKLD MN-PD 6967 — —
510-349 RICHMOND 9748 — —
510-350 OKLD MN-PD 7145 — Yes
510-351 OKLD TRNID 9740 — —
510-352 OKLD TRNID 9740 — —
510-353 FRNK OLIVR 9740 — Yes
510-354 FRNK OLIVR 9740 — —
510-355 OKLD ALMD 8826 — Yes
510-356 OKLD BKLY 9740 2007-11-28 Yes
510-357 OKLD TRNID 9740 — —
510-358 FRNK MAIN 6010 2011-07-08 Yes
510-359 HAYWARD 6006 2012-08-17 Yes
510-360 FRNK OLIVR 9740 — —
510-361 HAYWARD 7718 2014-10-27 Yes
510-362 HAYWARD 6529 2013-05-16 Yes
510-363 HAYWARD 6006 2008-01-14 Yes
510-364 FRNK MAIN 6010 2001-11-28 —
510-365 OKLD BKLY 6529 2013-09-26 Yes
510-366 FRNK MAIN 6010 — —
510-367 RICHMOND 6010 — —
510-368 OKLD MN-PD 6006 — Yes
510-369 RICHMOND 649C 2016-02-04 Yes
510-370 HAYWARD 373F 2012-04-13 Yes
510-371 FRNK MAIN 8826 2008-08-07 Yes
510-372 HAYWARD 649C — Yes
510-373 OKLD ALMD 649C — Yes
510-374 RICHMOND 9740 — Yes
510-375 RICHMOND 6529 2001-12-26 Yes
510-376 FRNK MAIN 5562 — Yes
510-377 FRNK MAIN 6529 — Yes
510-378 FRNK MAIN 6010 — —
510-379 OKLD MN-PD 7718 — Yes
510-380 OKLD MN-PD 649C — Yes
510-381 OKLD MN-PD 6006 — —
510-382 OKLD TRNID 9740 — —
510-383 OKLD TRNID 9740 — Yes
510-384 OKLD MN-PD 6010 — —
510-385 OKLD MN-PD 6529 — Yes
510-386 FRNK MAIN 6010 — —
510-387 OKLD MN-PD 6010 — —
510-388 OKLD MN-PD 6010 — —
510-389 OKLD TRNID 7145 2023-06-28 Yes
510-390 OKLD MN-PD 6006 — Yes
510-391 FRNK MAIN 6010 2023-12-21 Yes
510-392 ELSBR-PINL 6010 2024-01-16 Yes
510-393 OKLD MN-PD 6529 — Yes
510-394 OKLD TRNID 7145 — Yes
510-395 OKLD FRTVL 7145 — Yes
510-396 FRNK MAIN 6529 2001-12-26 —
510-397 HAYWARD 394L 2008-08-28 Yes
510-398 HAYWARD 981E 2012-08-17 Yes
510-399 FRNK MAIN 649C 2016-05-06 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.