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
510-200 HAYWARD 5562 2008-11-12 Yes
510-201 OKLD MN-PD 373F 2009-02-14 Yes
510-202 OKLD MN-PD 9262 — —
510-203 FRNK MAIN 6529 2015-09-22 Yes
510-204 OKLD BKLY 9740 — —
510-205 OKLD ALMD 5562 — Yes
510-206 OKLD MN-PD 6010 — —
510-207 OKLD MN-PD 6010 — —
510-208 OKLD MN-PD 9740 — —
510-209 HAYWARD 5562 — Yes
510-210 RICHMOND 981E 2013-01-04 Yes
510-211 XXXXXXXXXX MULT — —
510-212 FRNK OLIVR 6630 — —
510-213 OKLD FRTVL 6529 2002-09-19 Yes
510-214 OKLD ALMD 7240 — Yes
510-215 RICHMOND 9740 — —
510-216 OKLD FRTVL 6529 2019-09-27 Yes
510-217 OKLD ALMD 7145 — Yes
510-218 FRNK OLIVR 6630 — —
510-219 OKLD MN-PD 6010 — —
510-220 OKLD MN-PD 6010 — —
510-221 RICHMOND 5562 2007-02-08 Yes
510-222 ELSBR-PINL 9740 — —
510-223 ELSBR-PINL 9740 — —
510-224 HRCUL-RODE 6529 2001-10-18 Yes
510-225 OKLD BKLY 7229 — Yes
510-226 FRNK OLIVR 9740 — —
510-227 OKLD ALMD 7718 — Yes
510-228 OKLD FRTVL 8826 — Yes
510-229 OKLD BKLY 9740 — Yes
510-230 RICHMOND 6529 2007-02-15 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 — —
510-239 OKLD ALMD 671J — Yes
510-240 FRNK GRNLF 7718 — Yes
510-241 ELSBR-PINL 6529 2015-09-22 Yes
510-242 RICHMOND 9740 — —
510-243 ELSBR-PINL 9740 — Yes
510-244 HAYWARD 981E 2011-07-25 Yes
510-245 HRCUL-RODE 9740 — —
510-246 HAYWARD 6006 2011-08-09 Yes
510-247 HAYWARD 9740 — Yes
510-248 FRNK MAIN 8826 — Yes
510-249 FRNK OLIVR 9740 — —
510-250 OKLD MN-PD 8826 — Yes
510-251 OKLD MN-PD 9740 — —
510-252 FRNK OLIVR 9740 — —
510-253 RICHMOND 7718 — Yes
510-254 OKLD ALMD 8826 2011-09-15 Yes
510-255 RICHMOND 981E 2011-04-28 Yes
510-256 CROCKETT 981E — Yes
510-257 FRNK OLIVR 7145 — Yes
510-258 HAYWARD 9740 — Yes
510-259 HAYWARD 9740 — Yes
510-260 RICHMOND 394L — 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
510-269 OKLD FRTVL 7240 — Yes
510-270 FRNK OLIVR 7229 — Yes
510-271 OKLD MN-PD 9740 — —
510-272 OKLD MN-PD 9740 — Yes
510-273 OKLD MN-PD 9740 — —
510-274 HAYWARD 9262 — Yes
510-275 ELSBR-PINL 649C — Yes
510-276 HAYWARD 9740 — —
510-277 OKLD BKLY 8826 — Yes
510-278 HAYWARD 9740 — —
510-279 FRNK OLIVR 8826 — Yes
510-280 OKLD BKLY 7229 — Yes
510-281 OKLD MN-PD 649C — —
510-282 OKLD MN-PD 6529 2001-12-26 —
510-283 ELSBR-PINL 7229 — Yes
510-284 FRNK MAIN 9740 — Yes
510-285 OKLD MN-PD 7240 — Yes
510-286 OKLD MN-PD 9740 — —
510-287 OKLD MN-PD 9740 — Yes
510-288 OKLD MN-PD 649C — —
510-289 OKLD MN-PD 6010 — —
510-290 OKLD MN-PD 6529 — Yes
510-291 OKLD MN-PD 649C — Yes
510-292 OKLD BKLY 9740 — Yes
510-293 HAYWARD 9740 — Yes
510-294 HAYWARD 5562 2011-11-04 Yes
510-295 OKLD BKLY 6006 — Yes
510-296 HRCUL-RODE 8826 — Yes
510-297 OKLD TRNID 9740 — —
510-298 FRNK MAIN 6010 2012-12-07 Yes
510-299 FRNK MAIN 6006 — —

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.