Area Code 424
Map of California area codes in blue (and border states) with 310/424 in red
North American telephone area codes 310 and 424 are the California telephone area code which are roughly coterminous with the West Los Angeles and South Bay areas of Los Angeles County, including offshore Catalina Island, located 40 km (26 mi.) south of the mainland portion of Los Angeles County. It also includes a small portion of Ventura County. Area code 310 was split from Area code 213 on November 2, 1991; The 424 area code overlay of 310 became effective on July 26, 2006. Area code 213, which at its inception covered all of Southern California, is now reserved exclusively for a small area of central Downtown Los Angeles having been divided by the addition of the Area code 323.
Area code 424 is the first non-mobile area code overlay in Southern California. Because of this, dialers in the 310 area code are no longer able to dial a 7-digit number even if they are dialing another phone number in the same area code. Until the overlay of area codes 657 and 714 became active in 2008, the 310-424 complex was the only area code overlay in the entire state of California, despite California having more area codes than any other state.
310 was the first area code to be assigned that used the form N-1-0. At the time, all area codes were still required to have either 0 (zero) or 1 (one) for their middle digit, but by 1991 there were only five unassigned area codes remaining that followed this pattern. Area codes ending in 1-0 were not possible, but this changed in the early 1990s after it became a requirement to dial a "1" before the area code to signal a long distance call. This change allowed an additional seven new area codes to become available for assignment: 210, 310, 410, 510, 610, 810, and 910 (710 was reserved for the U.S. Government.) Without these, all remaining area codes would've been assigned by 1992, but the inclusion of the seven N-1-0 numbers allowed NANPA to continue assigning new area codes with 0 or 1 in the middle digit through 1994 (when area code 610 was assigned to Pennsylvania). The first area codes assigned the following year (1995) were the first to have middle digits other than 0 or 1 (area codes 334 in Alabama and 360 in Washington).
Numbers starting with 424
424-405 424-769 424-825 424-857 424-844 424-707 424-459 424-742 424-781 424-451 424-417 424-480 424-433 424-762 424-686 424-802 424-338 424-298 424-723 424-952 424-754 424-633 424-965 424-272 424-700 424-473 424-555 424-245 424-741 424-563 424-805 424-921 424-235 424-483 424-361 424-906 424-249 424-461 424-468 424-399 424-413 424-215 424-620 424-828 424-334 424-899 424-658 424-715 424-985 424-759 424-690 424-604 424-979 424-616 424-782 424-833 424-564 424-333 424-968 424-491 424-941 424-748 424-619 424-562 424-418 424-275 424-292 424-890 424-803 424-313 424-886 424-209 424-329 424-343 424-947 424-493 424-835 424-295 424-392 424-439 424-293 424-846 424-216 424-277 424-429 424-525 424-869 424-362 424-404 424-760 424-729 424-666 424-929 424-939 424-274 424-427 424-205 424-975 424-989 424-960 424-916 424-227 424-253 424-565 424-548 424-980 424-366 424-721 424-520 424-398 424-381 424-768 424-582 424-449 424-478 424-726 424-761 424-327 424-901 424-237 424-243 424-750 424-737 424-422 424-302 424-995 424-974 424-942 424-321 424-258 424-783 424-922 424-814 424-450 424-234 424-299 424-661 424-849 424-972 424-680 424-977 424-393 424-816 424-973 424-428 424-865 424-697 424-967 424-279 424-915 424-353 424-394 424-504 424-283 424-913 424-498 424-665 424-228 424-763 424-568 424-290 424-213 424-716 424-420 424-465 424-983 424-287 424-629 424-322 424-649 424-914 424-571 424-535 424-453 424-873 424-560 424-528 424-920 424-800 424-518 424-756 424-488 424-670 424-646 424-807 424-341 424-733 424-792 424-888 424-660 424-372 424-276 424-387 424-713 424-943 424-575 424-244 424-581 424-484 424-431 424-423 424-930 424-711 424-988 424-855 424-246 424-380 424-426 424-969 424-996 424-650 424-826 424-740 424-487 424-288 424-635 424-351 424-621 424-286 424-909 424-868 424-549 424-925 424-475 424-866 424-839 424-348 424-709 424-881 424-705 424-672 424-281 424-547 424-454 424-766 424-515 424-773 424-440 424-566 424-576 424-743 424-630 424-463 424-438 424-375 424-273 424-710 424-918 424-303 424-389 424-755 424-460 424-516 424-509 424-862 424-795 424-456 424-534 424-356 424-443 424-308 424-659 424-747 424-609 424-910 424-391 424-316 424-519 424-675 424-657 424-765 424-533 424-809 424-643 424-902 424-240 424-645 424-224 424-880 424-863 424-271 424-589 424-808 424-577 424-365 424-998 424-859 424-843 424-824 424-379 424-472 424-499 424-610 424-877 424-346 424-388 424-214 424-401 424-937 424-797 424-926 424-887 424-587 424-350 424-371 424-905 424-508 424-771 424-352 424-561 424-264 424-720 424-514 424-957 424-638 424-813 424-799 424-506 424-624 424-653 424-282 424-320 424-798 424-911 424-698 424-599 424-976 424-336 424-202 424-452 424-330 424-430 424-936 424-377 424-219 424-684 424-626 424-679 424-409 424-238 424-403 424-970 424-639 424-524 424-954 424-530 424-477 424-359 424-574 424-285 424-641 424-860 424-892 424-948 424-536 424-696 424-374 424-622 424-328 424-539 424-791 424-664 424-900 424-602 424-801 424-591 424-543 424-259 424-879 424-280 424-836 424-502 424-424 424-531 424-897 424-269 424-945 424-476 424-415 424-521 424-471 424-856 424-951 424-474 424-307 424-864 424-425 424-446 424-432 424-751 424-691 424-448 424-847 424-931 424-663 424-693 424-364 424-505 424-606 424-601 424-340 424-784 424-358 424-355 424-938 424-369 424-962 424-384 424-580 424-354 424-444 424-682 424-987 424-852 424-416 424-662 424-774 424-467 424-669 424-912 424-683 424-466 424-644 424-725 424-485 424-770 424-441 424-481 424-319 424-749 424-382 424-780 424-831 424-891 424-730 424-241 424-603 424-688 424-867 424-597 424-841 424-373 424-212 424-527 424-923 424-262 424-752 424-779 424-810 424-614 424-596 424-904 424-220 424-357 424-554 424-893 424-764 424-642 424-992 424-677 424-206 424-383 424-592 424-242 424-570 424-806 424-731 424-636 424-927 424-694 424-702 424-541 424-442 424-544 424-501 424-551 424-758 424-342 424-955 424-507 424-687 424-667 424-894 424-903 424-368 424-692 424-997 424-588 424-540 424-306 424-314 424-265 424-840 424-396 424-378 424-517 424-884 424-668 424-706 424-325 424-256 424-526 424-550 424-895 424-232 424-778 424-347 424-953 424-732 424-971 424-681 424-924 424-538 424-848 424-853 424-964 424-994 424-270 424-724 424-492 424-882 424-789 424-889 424-464 424-406 424-830 424-678 424-787 424-885 424-578 424-231 424-699 424-332 424-254 424-537 424-496 424-410 424-222 424-793 424-411 424-335 424-208 424-586 424-842 424-637 424-785 424-704 424-203 424-861 424-251 424-248 424-252 424-821 424-612 424-883 424-777 424-522 424-494 424-217 424-458 424-266 424-457 424-722 424-819 424-623 424-573 424-796 424-811 424-226 424-874 424-593 424-247 424-489 424-470 424-834 424-984 424-557 424-837 424-615 424-294 424-878 424-896 424-289 424-400 424-486 424-786 424-652 424-421 424-827 424-932 424-546 424-625 424-634 424-734 424-229 424-233 424-934 424-875 424-284 424-390 424-529 424-935 424-255 424-210 424-510 424-367 424-685 424-981 424-908 424-201 424-703 424-553 424-402 424-239 424-490 424-605 424-928 424-772 424-310 424-695 424-513 424-944 424-324 424-651 424-674 424-412 424-815 424-301 424-917 424-817 424-579 424-558 424-736 424-876 424-386 424-613 424-804 424-851 424-858 424-204 424-532 424-832 424-999 424-845 424-600 424-775 424-991 424-344 424-776 424-790 424-714 424-708 424-263 424-495 424-268 424-278 424-818 424-315 424-556 424-339 424-628 424-719 424-617 424-794 424-296 424-331 424-408 424-569 424-735 424-689 424-437 424-673 424-956 424-370 424-594 424-820 424-211 424-445 424-950 424-757 424-608 424-829 424-738 424-671 424-376 424-632 424-500 424-225 424-360 424-717 424-933 424-727 424-585 424-309 424-447 424-436 424-676 424-305 424-419 424-598 424-434 424-990 424-584 424-982 424-323 424-753 424-545 424-223 424-455 424-397 424-267 424-230 424-963 424-854 424-647 424-590 424-744 424-435 424-559 424-712 424-395 424-511 424-946 424-728 424-746 424-966 424-739 424-297 424-300 424-838 424-250 424-337 424-949 424-627 424-542 424-648 424-640 424-701 424-345 424-523 424-385 424-961 424-349 424-993 424-482 424-326 424-318 424-812 424-850 424-317 424-655 424-407 424-718 424-479 424-304 424-363 424-654 424-656 424-618 424-919 424-462 424-940 424-823 424-414 424-200 424-870 424-469 424-311 424-611 424-221 424-871 424-567 424-503 424-497 424-872 424-767 424-631 424-959 424-978 424-958 424-986 424-595 424-822 424-207 424-552 424-261 424-257 424-607 424-788 424-512 424-907 424-898 424-291 424-236 424-218 424-260 424-572 424-312 424-745 424-583