| Prefixes | City | County | Line Type | Company |
|---|---|---|---|---|
| 925-200 | Pleasanton | Alameda | Cell Phone | Cellco Partnership Dba Veri... |
| 925-201 | Pleasanton | Alameda | Landline | Mpower Communications Corp... |
| 925-202 | Walnut Creek | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-203 | San Ramon | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-204 | Orinda | Contra Costa | Landline | Unknown |
| 925-205 | Antioch | Contra Costa | Landline | American Messaging Services... |
| 925-206 | Antioch | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-207 | Walnut Creek | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-208 | Danville | Contra Costa | Landline | Teleport Communications Gro... |
| 925-209 | Pleasanton | Alameda | Cell Phone | Sprint Spectrum L.p. |
| 925-210 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-212 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-215 | Livermore | Alameda | Landline | Broadwing Communications, L... |
| 925-216 | Pleasanton | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-217 | Danville | Contra Costa | Landline | Broadwing Communications, L... |
| 925-218 | Pleasanton | Alameda | Landline | Broadwing Communications, L... |
| 925-219 | Antioch | Contra Costa | Landline | Broadwing Communications, L... |
| 925-223 | Pleasanton | Alameda | Landline | Mcimetro Access Transmissio... |
| 925-224 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-225 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-226 | Pleasanton | Alameda | Landline | Xo California, Inc. |
| 925-227 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-228 | Martinez | Contra Costa | Landline | Pacific Bell |
| 925-229 | Martinez | Contra Costa | Landline | Pacific Bell |
| 925-230 | San Ramon | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-231 | Martinez | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-232 | Concord | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-233 | Alamo | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-234 | Antioch | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-235 | Moraga | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-236 | San Ramon | Contra Costa | Landline | Broadwing Communications, L... |
| 925-237 | Fremont | Alameda | Landline | Xo California, Inc. |
| 925-238 | Antioch | Contra Costa | Landline | Comcast Phone Of California... |
| 925-240 | Brentwood | Contra Costa | Landline | Pacific Bell |
| 925-241 | Dublin | Alameda | Landline | Mcimetro Access Transmissio... |
| 925-242 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-243 | Livermore | Alameda | Landline | Pacific Bell |
| 925-244 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-245 | Livermore | Alameda | Landline | Pacific Bell |
| 925-246 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-247 | Moraga | Contra Costa | Landline | Pacific Bell |
| 925-248 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-249 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-250 | Concord | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-251 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-252 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-253 | Orinda | Contra Costa | Landline | Pacific Bell |
| 925-254 | Orinda | Contra Costa | Landline | Pacific Bell |
| 925-255 | Walnut Creek | Contra Costa | Landline | Mci Worldcom Communications... |
| 925-256 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-257 | Orinda | Contra Costa | Landline | Mcimetro Access Transmissio... |
| 925-258 | Orinda | Contra Costa | Landline | Pacific Bell |
| 925-259 | Pittsburg | Contra Costa | Landline | Xo California, Inc. |
| 925-260 | Walnut Creek | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-261 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-262 | Walnut Creek | Contra Costa | Landline | Global Crossing Local Servi... |
| 925-263 | Danville | Contra Costa | Landline | Global Crossing Local Servi... |
| 925-264 | Pleasanton | Alameda | Landline | Global Crossing Local Servi... |
| 925-265 | Concord | Contra Costa | Landline | Global Crossing Local Servi... |
| 925-266 | Pleasanton | Alameda | Landline | Unknown |
| 925-267 | Pittsburg | Contra Costa | Landline | Xo California, Inc. |
| 925-268 | Walnut Creek | Contra Costa | Landline | Xo California, Inc. |
| 925-269 | Martinez | Contra Costa | Landline | Xo California, Inc. |
| 925-270 | Concord | Contra Costa | Landline | Broadwing Communications, L... |
| 925-271 | Pleasanton | Alameda | Landline | Teleport Communications Gro... |
| 925-272 | Danville | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-273 | Livermore | Alameda | Landline | Xo California, Inc. |
| 925-274 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-275 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-276 | Dublin | Alameda | Landline | Xo California, Inc. |
| 925-277 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-279 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-280 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-281 | Antioch | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-282 | Walnut Creek | Contra Costa | Landline | Mcimetro Access Transmissio... |
| 925-283 | Lafayette | Contra Costa | Landline | Pacific Bell |
| 925-284 | Lafayette | Contra Costa | Landline | Pacific Bell |
| 925-285 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-286 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-287 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-288 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-290 | Livermore | Alameda | Landline | Xo California, Inc. |
| 925-291 | Pittsburg | Contra Costa | Landline | Xo California, Inc. |
| 925-292 | Livermore | Alameda | Landline | Comcast Phone Of California... |
| 925-293 | San Ramon | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-294 | Livermore | Alameda | Landline | Pacific Bell |
| 925-295 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-296 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-297 | Lafayette | Contra Costa | Landline | Xo California, Inc. |
| 925-298 | Martinez | Contra Costa | Landline | Mci Worldcom Communications... |
| 925-299 | Lafayette | Contra Costa | Landline | Pacific Bell |
| 925-300 | Walnut Creek | Contra Costa | Landline | O1 Communications, Inc. Ca |
| 925-301 | Antioch | Contra Costa | Landline | O1 Communications, Inc. Ca |
| 925-302 | San Ramon | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-303 | Antioch | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-304 | Concord | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-305 | Antioch | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-306 | Livermore | Alameda | Cell Phone | Usa Mobility Wireless, Inc. |
| 925-307 | Dublin | Alameda | Landline | Tw Telecom Of California Lp... |
| 925-308 | Brentwood | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-309 | Danville | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-313 | Martinez | Contra Costa | Landline | Pacific Bell |
| 925-314 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-315 | San Ramon | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-316 | Walnut Creek | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-317 | Danville | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-318 | Pittsburg | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-319 | Concord | Contra Costa | Cell Phone | Tmobile Usa, Inc. |
| 925-320 | Walnut Creek | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-321 | Livermore | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-323 | Concord | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-324 | Walnut Creek | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-325 | Concord | Contra Costa | Cell Phone | Tmobile Usa, Inc. |
| 925-327 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-328 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-330 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-331 | Antioch | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-333 | Oakland | Alameda | Landline | Cook Telecom, Inc. |
| 925-335 | Martinez | Contra Costa | Landline | Pacific Bell |
| 925-336 | Pleasanton | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-337 | Livermore | Alameda | Cell Phone | Cellco Partnership Dba Veri... |
| 925-339 | Livermore | Alameda | Landline | Metro Pcs, Inc. |
| 925-340 | Walnut Creek | Contra Costa | Cell Phone | Usa Mobility Wireless, Inc. |
| 925-341 | San Ramon | Contra Costa | Landline | Cook Telecom, Inc. |
| 925-343 | Livermore | Alameda | Landline | American Messaging Services... |
| 925-344 | Livermore | Alameda | Landline | Mpower Communications Corp... |
| 925-345 | Walnut Creek | Contra Costa | Landline | Cook Telecom, Inc. |
| 925-346 | Martinez | Contra Costa | Landline | Cook Telecom, Inc. |
| 925-348 | Concord | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-349 | Concord | Contra Costa | Landline | Teleport Communications Gro... |
| 925-350 | Antioch | Contra Costa | Landline | Unknown |
| 925-351 | Pleasanton | Alameda | Cell Phone | Sprint Spectrum L.p. |
| 925-352 | Concord | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-353 | Pleasanton | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-354 | Antioch | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-355 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-356 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-358 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-359 | San Ramon | Contra Costa | Landline | Mcimetro Access Transmissio... |
| 925-360 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-361 | Dublin | Alameda | Landline | Teleport Communications Gro... |
| 925-362 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-363 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-364 | Concord | Contra Costa | Landline | Mci Worldcom Communications... |
| 925-365 | San Ramon | Contra Costa | Landline | Teleport Communications Gro... |
| 925-366 | San Ramon | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-367 | Martinez | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-368 | Concord | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-369 | Martinez | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-370 | Martinez | Contra Costa | Landline | Pacific Bell |
| 925-371 | Livermore | Alameda | Landline | Pacific Bell |
| 925-372 | Martinez | Contra Costa | Landline | Pacific Bell |
| 925-373 | Livermore | Alameda | Landline | Pacific Bell |
| 925-374 | Martinez | Contra Costa | Landline | Allegiance Telecom, Inc. Ca |
| 925-375 | Martinez | Contra Costa | Landline | Unknown |
| 925-376 | Moraga | Contra Costa | Landline | Pacific Bell |
| 925-377 | Moraga | Contra Costa | Landline | Pacific Bell |
| 925-380 | San Ramon | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-381 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-382 | Antioch | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-383 | Concord | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-385 | Lafayette | Contra Costa | Landline | Teleport Communications Gro... |
| 925-386 | Orinda | Contra Costa | Landline | Teleport Communications Gro... |
| 925-387 | Martinez | Contra Costa | Landline | Teleport Communications Gro... |
| 925-388 | Moraga | Contra Costa | Landline | Teleport Communications Gro... |
| 925-389 | Danville | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-392 | Brentwood | Contra Costa | Landline | Teleport Communications Gro... |
| 925-393 | Walnut Creek | Contra Costa | Landline | Unknown |
| 925-394 | San Ramon | Contra Costa | Landline | Global Crossing Local Servi... |
| 925-395 | Walnut Creek | Contra Costa | Landline | At&t Local |
| 925-396 | Martinez | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-397 | Pleasanton | Alameda | Landline | Pac West Telecomm, Inc. |
| 925-398 | Pleasanton | Alameda | Landline | Teleport Communications Gro... |
| 925-399 | Pleasanton | Alameda | Landline | Comcast Phone Of California... |
| 925-400 | Pleasanton | Alameda | Landline | O1 Communications, Inc. Ca |
| 925-401 | Pleasanton | Alameda | Landline | Allegiance Telecom, Inc. Ca |
| 925-402 | Lafayette | Contra Costa | Landline | Allegiance Telecom, Inc. Ca |
| 925-403 | Lafayette | Contra Costa | Landline | Allegiance Telecom, Inc. Ca |
| 925-404 | Dublin | Alameda | Landline | Allegiance Telecom, Inc. Ca |
| 925-405 | Concord | Contra Costa | Landline | Allegiance Telecom, Inc. Ca |
| 925-406 | San Ramon | Contra Costa | Landline | Allegiance Telecom, Inc. Ca |
| 925-407 | Walnut Creek | Contra Costa | Landline | Allegiance Telecom, Inc. Ca |
| 925-408 | Concord | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-413 | Livermore | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-415 | San Ramon | Contra Costa | Landline | Broadwing Communications, L... |
| 925-416 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-417 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-418 | Brentwood | Contra Costa | Landline | Broadwing Communications, L... |
| 925-420 | Brentwood | Contra Costa | Landline | O1 Communications, Inc. Ca |
| 925-422 | Livermore | Alameda | Landline | Pacific Bell |
| 925-423 | Livermore | Alameda | Landline | Pacific Bell |
| 925-424 | Livermore | Alameda | Landline | Pacific Bell |
| 925-425 | Pleasanton | Alameda | Landline | Teleport Communications Gro... |
| 925-426 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-427 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-429 | Concord | Contra Costa | Landline | Broadwing Communications, L... |
| 925-430 | Pittsburg | Contra Costa | Landline | Unknown |
| 925-431 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-432 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-435 | Concord | Contra Costa | Cell Phone | Tmobile Usa, Inc. |
| 925-437 | Brentwood | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-438 | Orinda | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-439 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-443 | Livermore | Alameda | Landline | Pacific Bell |
| 925-444 | Lafayette | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-445 | Livermore | Alameda | Landline | Unknown |
| 925-447 | Livermore | Alameda | Landline | Pacific Bell |
| 925-449 | Livermore | Alameda | Landline | Pacific Bell |
| 925-451 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-452 | Dublin | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-453 | Livermore | Alameda | Landline | Mcimetro Access Transmissio... |
| 925-454 | Livermore | Alameda | Landline | Pacific Bell |
| 925-455 | Livermore | Alameda | Landline | Pacific Bell |
| 925-456 | Livermore | Alameda | Landline | Pacific Bell |
| 925-457 | Walnut Creek | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-458 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-459 | Concord | Contra Costa | Landline | Broadwing Communications, L... |
| 925-460 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-461 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-462 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-463 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-465 | Walnut Creek | Contra Costa | Landline | Broadwing Communications, L... |
| 925-467 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-468 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-469 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-470 | Antioch | Contra Costa | Landline | Teleport Communications Gro... |
| 925-471 | Los Angeles | Los Angeles | Landline | Unknown |
| 925-472 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-473 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-474 | Pleasanton | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-475 | Pleasanton | Alameda | Landline | Pac West Telecomm, Inc. |
| 925-476 | Walnut Creek | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-478 | Walnut Creek | Contra Costa | Landline | Level 3 Communications, Llc... |
| 925-479 | Dublin | Alameda | Landline | Pacific Bell |
| 925-480 | Pleasanton | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-482 | Concord | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-484 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-485 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-486 | Sacramento | Sacramento | Landline | Unknown |
| 925-487 | Livermore | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-493 | San Ramon | Contra Costa | Landline | Teleport Communications Gro... |
| 925-497 | Concord | Contra Costa | Landline | Metro Pcs, Inc. |
| 925-498 | San Ramon | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-510 | Walnut Creek | Contra Costa | Landline | Unknown |
| 925-513 | Brentwood | Contra Costa | Landline | Pacific Bell |
| 925-516 | Brentwood | Contra Costa | Landline | Pacific Bell |
| 925-517 | Lafayette | Contra Costa | Landline | O1 Communications, Inc. Ca |
| 925-518 | Livermore | Alameda | Cell Phone | Sprint Spectrum L.p. |
| 925-519 | Pleasanton | Alameda | Cell Phone | Cellco Partnership Dba Veri... |
| 925-520 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-521 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-522 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-523 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-524 | Clayton | Contra Costa | Landline | Pacific Bell |
| 925-525 | Livermore | Alameda | Cell Phone | Nextel Communications, Inc. |
| 925-526 | Walnut Creek | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-528 | Walnut Creek | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-529 | Clayton | Contra Costa | Landline | Cf Communications, Llc Dba... |
| 925-536 | San Ramon | Contra Costa | Landline | Unknown |
| 925-537 | Hayward | Alameda | Landline | Unknown |
| 925-543 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-548 | Martinez | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-549 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-550 | Antioch | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-551 | Dublin | Alameda | Landline | Pacific Bell |
| 925-552 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-553 | Danville | Contra Costa | Landline | Xo California, Inc. |
| 925-556 | Dublin | Alameda | Landline | Pacific Bell |
| 925-557 | Dublin | Alameda | Landline | Mci Worldcom Communications... |
| 925-558 | Dublin | Alameda | Landline | Xo California, Inc. |
| 925-560 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-564 | Meadview | Mohave | Landline | Unknown |
| 925-565 | Antioch | Contra Costa | Landline | Metro Pcs, Inc. |
| 925-566 | Concord | Contra Costa | Landline | At&t Local |
| 925-567 | Martinez | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-568 | Sunol | Alameda | Landline | Teleport Communications Gro... |
| 925-570 | Dublin | Alameda | Cell Phone | Nextel Communications, Inc. |
| 925-571 | San Ramon | Contra Costa | Landline | North County Communications... |
| 925-572 | Danville | Contra Costa | Landline | North County Communications... |
| 925-573 | Alamo | Contra Costa | Landline | North County Communications... |
| 925-574 | Dublin | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-575 | Danville | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-577 | San Ramon | Contra Costa | Cell Phone | Tmobile Usa, Inc. |
| 925-579 | Livermore | Alameda | Landline | Allegiance Telecom, Inc. Ca |
| 925-580 | Livermore | Alameda | Cell Phone | Nextel Communications, Inc. |
| 925-582 | Castro Valley | Alameda | Landline | Unknown |
| 925-583 | Livermore | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-584 | Antioch | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-586 | Walnut Creek | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-587 | Dublin | Alameda | Landline | Mpower Communications Corp... |
| 925-588 | Walnut Creek | Contra Costa | Landline | Mpower Communications Corp... |
| 925-592 | San Ramon | Contra Costa | Landline | Mpower Communications Corp... |
| 925-594 | Antioch | Contra Costa | Landline | Metro Pcs, Inc. |
| 925-595 | Walnut Creek | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-596 | Pleasanton | Alameda | Cell Phone | Cellco Partnership Dba Veri... |
| 925-597 | Puyallup | Pierce | Cell Phone | Cellco Partnership Dba Veri... |
| 925-598 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-600 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-602 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-603 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-605 | Livermore | Alameda | Landline | Pac West Telecomm, Inc. |
| 925-606 | Livermore | Alameda | Landline | Pacific Bell |
| 925-608 | Martinez | Contra Costa | Landline | Broadwing Communications, L... |
| 925-609 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-621 | Pleasanton | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-623 | Pleasanton | Alameda | Cell Phone | Sprint Spectrum L.p. |
| 925-625 | Oakley | Contra Costa | Landline | Pacific Bell |
| 925-626 | Brentwood | Contra Costa | Landline | Mcimetro Access Transmissio... |
| 925-627 | Walnut Creek | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-628 | Concord | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-631 | Moraga | Contra Costa | Landline | Pacific Bell |
| 925-634 | Brentwood | Contra Costa | Landline | Pacific Bell |
| 925-635 | Livermore | Alameda | Landline | Teleport Communications Gro... |
| 925-639 | Walnut Creek | Contra Costa | Cell Phone | Tmobile Usa, Inc. |
| 925-640 | Martinez | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-642 | Antioch | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-643 | Pittsburg | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-646 | Martinez | Contra Costa | Landline | Pacific Bell |
| 925-648 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-658 | Walnut Creek | Contra Costa | Landline | Teleport Communications Gro... |
| 925-659 | San Ramon | Contra Costa | Landline | Teleport Communications Gro... |
| 925-660 | Pleasanton | Alameda | Landline | Tw Telecom Of California Lp... |
| 925-663 | Concord | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-664 | Pittsburg | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-665 | Pittsburg | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-666 | Brentwood | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-667 | Livermore | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-671 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-672 | Clayton | Contra Costa | Landline | Pacific Bell |
| 925-673 | Clayton | Contra Costa | Landline | Pacific Bell |
| 925-674 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-675 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-676 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-677 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-678 | Livermore | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-679 | Oakley | Contra Costa | Landline | Pacific Bell |
| 925-680 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-681 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-682 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-683 | Danville | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-684 | Bethel Island | Contra Costa | Landline | Pacific Bell |
| 925-685 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-686 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-687 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-688 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-689 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-690 | Concord | Contra Costa | Landline | Mcimetro Access Transmissio... |
| 925-691 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-692 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-693 | Clayton | Contra Costa | Landline | Teleport Communications Gro... |
| 925-694 | Pleasanton | Alameda | Landline | Mcimetro Access Transmissio... |
| 925-695 | Concord | Contra Costa | Landline | Mpower Communications Corp... |
| 925-698 | Antioch | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-699 | Pleasanton | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-701 | Pleasanton | Alameda | Landline | U.s. Telepacific Corp. Ca |
| 925-705 | Walnut Creek | Contra Costa | Landline | Metro Pcs, Inc. |
| 925-706 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-708 | Walnut Creek | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-709 | Pittsburg | Contra Costa | Landline | Pacific Bell |
| 925-716 | Walnut Creek | Contra Costa | Landline | Unknown |
| 925-718 | Danville | Contra Costa | Landline | O1 Communications, Inc. Ca |
| 925-719 | San Ramon | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-723 | Martinez | Contra Costa | Landline | Mpower Communications Corp... |
| 925-724 | Livermore | Alameda | Landline | Mpower Communications Corp... |
| 925-725 | San Ramon | Contra Costa | Landline | Mpower Communications Corp... |
| 925-726 | Concord | Contra Costa | Landline | Mpower Communications Corp... |
| 925-727 | Antioch | Contra Costa | Landline | Mpower Communications Corp... |
| 925-728 | Dallas | Dallas | Landline | Unknown |
| 925-730 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-731 | San Ramon | Contra Costa | Landline | Unknown |
| 925-734 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-735 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-736 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-737 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-738 | Pleasanton | Alameda | Landline | Mcimetro Access Transmissio... |
| 925-742 | Livermore | Alameda | Landline | American Messaging Services... |
| 925-743 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-745 | Concord | Contra Costa | Landline | American Messaging Services... |
| 925-746 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-747 | Pleasanton | Alameda | Landline | Unknown |
| 925-748 | Fremont | Alameda | Landline | Unknown |
| 925-750 | Pleasanton | Alameda | Landline | Mcimetro Access Transmissio... |
| 925-751 | Walnut Creek | Contra Costa | Landline | Unknown |
| 925-752 | Concord | Contra Costa | Landline | Mcimetro Access Transmissio... |
| 925-753 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-754 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-755 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-756 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-757 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-759 | Concord | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-765 | Walnut Creek | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-766 | Walnut Creek | Contra Costa | Cell Phone | Nextel Communications, Inc. |
| 925-768 | Walnut Creek | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-771 | Concord | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-775 | Antelope | Sacramento | Landline | Pac West Telecomm, Inc. |
| 925-776 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-777 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-778 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-779 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-783 | Antioch | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-784 | Martinez | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-785 | Martinez | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-786 | Walnut Creek | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-787 | Concord | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-788 | Walnut Creek | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-789 | Pleasanton | Alameda | Cell Phone | Cellco Partnership Dba Veri... |
| 925-790 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-791 | Danville | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-794 | Oakley | Contra Costa | Landline | O1 Communications, Inc. Ca |
| 925-797 | Fremont | Alameda | Landline | Unknown |
| 925-798 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-803 | Dublin | Alameda | Landline | Pacific Bell |
| 925-804 | San Ramon | Contra Costa | Landline | Teleport Communications Gro... |
| 925-806 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-807 | San Ramon | Contra Costa | Landline | Xo California, Inc. |
| 925-808 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-809 | Brentwood | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-812 | Martinez | Contra Costa | Landline | Metro Pcs, Inc. |
| 925-813 | Antioch | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-815 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-817 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-818 | Concord | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-819 | San Ramon | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-820 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-822 | Concord | Contra Costa | Landline | Mcimetro Access Transmissio... |
| 925-823 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-824 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-825 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-826 | Concord | Contra Costa | Landline | Mci Worldcom Communications... |
| 925-827 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-828 | Dublin | Alameda | Landline | Pacific Bell |
| 925-829 | Dublin | Alameda | Landline | Pacific Bell |
| 925-830 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-831 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-833 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-834 | Oakland | Alameda | Landline | Unknown |
| 925-835 | Byron | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-837 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-838 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-839 | Martinez | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-842 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-844 | Pleasant Hill | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-846 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-847 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-848 | San Mateo | San Mateo | Landline | Pac West Telecomm, Inc. |
| 925-849 | Concord | Contra Costa | Landline | U.s. Telepacific Corp. Ca |
| 925-852 | Concord | Contra Costa | Landline | Xo California, Inc. |
| 925-854 | Alamo | Contra Costa | Landline | Mci Worldcom Communications... |
| 925-855 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-858 | San Ramon | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-860 | Danville | Contra Costa | Landline | Xo California, Inc. |
| 925-862 | Sunol | Alameda | Landline | Pacific Bell |
| 925-864 | Walnut Creek | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-866 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-867 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-871 | Lafayette | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-872 | San Ramon | Contra Costa | Cell Phone | Cellco Partnership Dba Veri... |
| 925-875 | Dublin | Alameda | Landline | Pacific Bell |
| 925-876 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-877 | Los Angeles | Los Angeles | Landline | Unknown |
| 925-878 | Santa Rosa | Sonoma | Cell Phone | Sprint Spectrum L.p. |
| 925-882 | Walnut Creek | Contra Costa | Landline | Unknown |
| 925-884 | San Ramon | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-885 | Orinda | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-886 | San Ramon | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-887 | Concord | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-888 | Moraga | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-889 | Clayton | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-890 | Pleasant Hill | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-891 | Walnut Creek | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-892 | Pleasanton | Alameda | Landline | Pac West Telecomm, Inc. |
| 925-895 | Livermore | Alameda | Cell Phone | Sprint Spectrum L.p. |
| 925-899 | Walnut Creek | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-900 | San Ramon | Contra Costa | Landline | O1 Communications, Inc. Ca |
| 925-901 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-904 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-905 | San Ramon | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-906 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-914 | Concord | Contra Costa | Cell Phone | Tmobile Usa, Inc. |
| 925-915 | San Ramon | Contra Costa | Cell Phone | Tmobile Usa, Inc. |
| 925-918 | Pleasanton | Alameda | Cell Phone | Cellco Partnership Dba Veri... |
| 925-922 | Pleasanton | Alameda | Cell Phone | Tmobile Usa, Inc. |
| 925-924 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-925 | Martinez | Contra Costa | Landline | Unknown |
| 925-926 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-927 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-929 | Martinez | Contra Costa | Landline | Unknown |
| 925-930 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-931 | Pleasanton | Alameda | Landline | Pacific Bell |
| 925-932 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-933 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-934 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-935 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-937 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-938 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-939 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-940 | Walnut Creek | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-941 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-942 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-943 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-944 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-945 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-946 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-947 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-948 | Walnut Creek | Contra Costa | Landline | Mci Worldcom Communications... |
| 925-949 | Walnut Creek | Contra Costa | Landline | Teleport Communications Gro... |
| 925-951 | Walnut Creek | Contra Costa | Landline | Mcimetro Access Transmissio... |
| 925-952 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-953 | Walnut Creek | Contra Costa | Landline | Tw Telecom Of California Lp... |
| 925-954 | Walnut Creek | Contra Costa | Landline | Mpower Communications Corp... |
| 925-955 | Lafayette | Contra Costa | Landline | Pac West Telecomm, Inc. |
| 925-956 | Walnut Creek | Contra Costa | Landline | Xo California, Inc. |
| 925-957 | Martinez | Contra Costa | Landline | Pacific Bell |
| 925-958 | Walnut Creek | Contra Costa | Landline | Unknown |
| 925-960 | Livermore | Alameda | Landline | Pacific Bell |
| 925-961 | Livermore | Alameda | Landline | Pacific Bell |
| 925-962 | Lafayette | Contra Costa | Landline | Pacific Bell |
| 925-963 | Pleasanton | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-964 | Danville | Contra Costa | Landline | Pacific Bell |
| 925-965 | Pleasanton | Alameda | Landline | At&t Local |
| 925-967 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-968 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-969 | Concord | Contra Costa | Landline | Pacific Bell |
| 925-973 | San Ramon | Contra Costa | Landline | Pacific Bell |
| 925-974 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-975 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-977 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-978 | Antioch | Contra Costa | Landline | Pacific Bell |
| 925-979 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-980 | Livermore | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-983 | San Ramon | Contra Costa | Landline | Mci Worldcom Communications... |
| 925-984 | Danville | Contra Costa | Cell Phone | Sprint Spectrum L.p. |
| 925-988 | Walnut Creek | Contra Costa | Landline | Pacific Bell |
| 925-989 | Pleasanton | Alameda | Cell Phone | Cellco Partnership Dba Veri... |
| 925-993 | San Ramon | Contra Costa | Landline | O1 Communications, Inc. Ca |
| 925-996 | Pleasant Hill | Contra Costa | Landline | Unknown |
| 925-997 | Pleasanton | Alameda | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-998 | Concord | Contra Costa | Cell Phone | New Cingular Wireless Pcs, Llc |
| 925-999 | San Ramon | Contra Costa | Landline | O1 Communications, Inc. Ca |