Area Code 925
Map of California area codes in blue (and border states) with 925 in red
In the North American Numbering Plan (NANP), area code 925 is an area code that covers the inland portions of the East Bay counties of Alameda and Contra Costa in northern California.
It was originally part of the 415 area code, one of the first three area codes created in California in 1947, which originally covered all of central California. In 1991 the 510 area code was created to encompass most of the Oakland Metropolitan Statistical Area (MSA). The 925 area code was created March 14, 1998 when the 510 area code was itself split along the natural border of the East Bay Hills. The number was formed by taking 415 and adding 510 which equals 925. It currently includes most of Contra Costa County and the eastern portion of Alameda County and is wholly contained within the Oakland MSA.
The area code includes southeastern Alameda County (Dublin, Pleasanton, Livermore, Sunol, and unincorporated areas surrounding those communities), and all of Contra Costa County except the western part (El Cerrito to Crockett).
Numbers starting with 925
925-380 925-981 925-486 925-290 925-937 925-352 925-461 925-632 925-457 925-739 925-466 925-246 925-294 925-609 925-791 925-978 925-494 925-749 925-705 925-974 925-879 925-740 925-895 925-346 925-677 925-998 925-452 925-641 925-965 925-860 925-638 925-859 925-200 925-621 925-917 925-913 925-986 925-428 925-863 925-676 925-711 925-582 925-338 925-451 925-708 925-606 925-715 925-468 925-557 925-670 925-368 925-805 925-922 925-857 925-259 925-322 925-880 925-824 925-608 925-252 925-549 925-853 925-755 925-746 925-343 925-544 925-505 925-776 925-817 925-349 925-849 925-643 925-916 925-454 925-610 925-842 925-576 925-823 925-395 925-731 925-225 925-345 925-491 925-947 925-234 925-985 925-366 925-464 925-445 925-959 925-356 925-498 925-597 925-635 925-270 925-679 925-245 925-754 925-887 925-381 925-871 925-888 925-377 925-940 925-319 925-315 925-675 925-320 925-402 925-434 925-520 925-207 925-347 925-976 925-953 925-317 925-211 925-623 925-391 925-626 925-633 925-893 925-957 925-552 925-716 925-829 925-271 925-335 925-228 925-554 925-848 925-508 925-288 925-949 925-802 925-354 925-604 925-801 925-455 925-816 925-987 925-333 925-911 925-964 925-467 925-837 925-828 925-515 925-215 925-868 925-263 925-417 925-703 925-660 925-803 925-413 925-397 925-784 925-293 925-948 925-787 925-279 925-205 925-360 925-952 925-644 925-332 925-615 925-814 925-657 925-766 925-956 925-646 925-357 925-718 925-289 925-442 925-374 925-881 925-993 925-914 925-694 925-826 925-772 925-212 925-528 925-931 925-714 925-372 925-701 925-359 925-809 925-654 925-671 925-789 925-590 925-208 925-384 925-540 925-624 925-419 925-723 925-992 925-536 925-443 925-855 925-685 925-433 925-396 925-278 925-543 925-969 925-235 925-524 925-977 925-683 925-712 925-566 925-517 925-493 925-813 925-783 925-861 925-821 925-424 925-877 925-444 925-665 925-932 925-411 925-469 925-440 925-287 925-872 925-852 925-699 925-488 925-247 925-405 925-927 925-280 925-885 925-982 925-751 925-500 925-795 925-577 925-950 925-925 925-973 925-583 925-775 925-662 925-979 925-627 925-642 925-637 925-761 925-307 925-518 925-681 925-562 925-786 925-674 925-472 925-477 925-704 925-822 925-479 925-832 925-738 925-620 925-850 925-747 925-369 925-579 925-406 925-845 925-495 925-277 925-910 925-420 925-808 925-951 925-630 925-596 925-668 925-497 925-209 925-796 925-206 925-487 925-567 925-580 925-725 925-224 925-321 925-889 925-726 925-301 925-839 925-907 925-390 925-750 925-388 925-298 925-586 925-788 925-602 925-664 925-745 925-780 925-869 925-794 925-693 925-565 925-323 925-523 925-432 925-781 925-480 925-997 925-436 925-924 925-303 925-736 925-989 925-970 925-484 925-502 925-697 925-330 925-884 925-217 925-460 925-269 925-504 925-462 925-526 925-511 925-864 925-653 925-735 925-286 925-512 925-692 925-550 925-690 925-899 925-645 925-242 925-667 925-941 925-256 925-954 925-905 925-312 925-450 925-426 925-262 925-774 925-340 925-984 925-603 925-362 925-614 925-350 925-649 925-229 925-799 925-990 925-551 925-578 925-673 925-819 925-570 925-659 925-777 925-490 925-909 925-838 925-767 925-656 925-752 925-506 925-429 925-908 925-316 925-720 925-404 925-239 925-866 925-841 925-955 925-647 925-658 925-820 925-988 925-966 925-980 925-773 925-529 925-928 925-373 925-267 925-574 925-222 925-473 925-244 925-203 925-548 925-935 925-669 925-409 925-510 925-555 925-534 925-308 925-282 925-758 925-385 925-672 925-815 925-382 925-204 925-296 925-936 925-556 925-915 925-995 925-611 925-612 925-587 925-386 925-387 925-535 925-291 925-448 925-449 925-896 925-827 925-328 925-585 925-865 925-310 925-533 925-825 925-707 925-546 925-471 925-522 925-482 925-983 925-721 925-281 925-559 925-961 925-742 925-342 925-650 925-326 925-415 925-619 925-284 925-792 925-430 925-790 925-592 925-617 925-717 925-686 925-900 925-241 925-221 925-339 925-862 925-906 925-416 925-591 925-441 925-547 925-867 925-622 925-942 925-680 925-226 925-218 925-378 925-782 925-810 925-652 925-302 925-249 925-847 925-834 925-854 925-599 925-748 925-840 925-741 925-503 925-804 925-999 925-700 925-763 925-870 925-710 925-331 925-934 925-563 925-501 925-882 925-371 925-629 925-379 925-573 925-300 925-489 925-223 925-734 925-797 925-232 925-594 925-960 925-962 925-764 925-423 925-727 925-972 925-719 925-306 925-219 925-431 925-403 925-737 925-894 925-438 925-318 925-892 925-383 925-875 925-588 925-474 925-698 925-639 925-846 925-521 925-537 925-628 925-729 925-485 925-696 925-422 925-499 925-770 925-531 925-903 925-753 925-732 925-831 925-616 925-558 925-327 925-856 925-933 925-651 925-398 925-830 925-513 925-427 925-904 925-779 925-798 925-361 925-655 925-722 925-706 925-299 925-367 925-929 925-890 925-687 925-958 925-437 925-618 925-297 925-968 925-248 925-636 925-324 925-584 925-216 925-963 925-295 925-756 925-439 925-227 925-329 925-806 925-946 925-569 925-470 925-251 925-912 925-532 925-709 925-760 925-994 925-713 925-926 925-412 925-593 925-394 925-778 925-283 925-435 925-682 925-392 925-364 925-930 925-363 925-210 925-661 925-919 925-901 925-858 925-418 925-744 925-762 925-691 925-255 925-640 925-589 925-309 925-481 925-527 925-923 925-376 925-509 925-507 925-525 925-581 925-230 925-425 925-545 925-613 925-938 925-812 925-724 925-678 925-898 925-607 925-918 925-408 925-539 925-213 925-991 925-939 925-818 925-733 925-996 925-414 925-598 925-311 925-400 925-688 925-260 925-325 925-240 925-728 925-785 925-553 925-793 925-971 925-873 925-237 925-453 925-254 925-421 925-921 925-944 925-236 925-238 925-257 925-336 925-666 925-843 925-201 925-876 925-348 925-353 925-920 925-496 925-337 925-258 925-304 925-835 925-631 925-483 925-478 925-975 925-967 925-519 925-625 925-759 925-492 925-575 925-446 925-407 925-292 925-341 925-344 925-401 925-695 925-730 925-261 925-634 925-272 925-475 925-399 925-447 925-768 925-253 925-800 925-844 925-243 925-458 925-285 925-945 925-811 925-334 925-851 925-886 925-743 925-878 925-370 925-233 925-351 925-220 925-757 925-266 925-530 925-833 925-276 925-541 925-393 925-516 925-410 925-459 925-600 925-564 925-807 925-456 925-313 925-601 925-314 925-463 925-689 925-702 925-476 925-542 925-355 925-365 925-264 925-902 925-275 925-571 925-514 925-605 925-358 925-769 925-943 925-305 925-891 925-568 925-202 925-684 925-231 925-595 925-771 925-765 925-874 925-561 925-883 925-250 925-274 925-465 925-538 925-572 925-214 925-836 925-648 925-560 925-897 925-663 925-268 925-375 925-273 925-389 925-265