Area codes in California

California has 41 area codes, per NANPA’s NPA report of 2026-11-10. The NANPA central office code report of 2026-11-10 lists 22,129 allocated central office codes there across 737 rate centres, 72.7% of them pooled; 345 were assigned in the twelve months from 2025-11-11.

The area codes of California

Each code with the place its page names, the year or day NANPA’s NPA report puts it in service, the codes it shares its area with, and the central office codes the NANPA central office code report allocates under it whose rate centre is in California. A rate centre is where the regulator recorded a code, not where a subscriber is.

code	place	in service	overlays	codes here	assigned, 12 months
209	—	1958	350	784	0
213	Los Angeles, CA	1947	323, 738	786	0
279	—	2018-03-10	916	152	11
310	—	1991-11-02	424	786	1
323	Los Angeles, CA	1998-06-13	213, 738	786	0
341	—	2019-07-22	510	113	7
350	—	2022-11-28	209	88	13
357	—	2025-03-26	559	9	9
369	—	2023-02-01	707	55	15
408	San Jose, CA	1959	669	786	1
415	San Francisco, CA	1947	628	785	1
424	—	2006-08-26	310	460	15
442	—	2009-11-21	760	356	10
510	Oakland, CA	1991-09-02	341	785	1
530	—	1997-11-01	837	782	7
559	—	1998-11-14	357	785	15
562	—	1997-01-25	—	702	8
619	—	1982	858	785	1
626	—	1997-06-14	—	739	10
628	San Francisco, CA	2015-03-21	415	193	1
650	—	1997-08-02	—	717	12
657	—	2008-09-23	714	705	56
661	—	1999-02-13	—	674	10
669	San Jose, CA	2012-11-20	408	238	5
707	—	1959	369	785	1
714	—	1951	657	785	0
738	Los Angeles, CA	2024-11-01	213, 323	30	24
747	—	2009-05-18	818	260	8
760	—	1997-03-22	442	785	0
805	—	1957	820	786	0
818	—	1984-01-07	747	781	1
820	—	2018-06-30	805	98	11
831	—	1998-07-11	—	406	5
837	—	2025-01-31	530	11	11
840	—	2021-02-23	909	132	17
858	—	1999-06-12	619	564	12
909	—	1992-11-14	840	786	0
916	Sacramento, CA	1947	279	785	0
925	—	1998-03-14	—	640	11
949	—	1998-04-18	—	747	22
951	—	2004-07-17	—	697	13

A year alone means NANPA’s date is 1 January of that year, which it uses where it records no day.

Overlays and new area codes

209 and 350 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
213, 323 and 738 serve one area: a number there can carry any of these 3 codes, so the area code alone does not place a number more precisely than the area.
279 and 916 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
310 and 424 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
341 and 510 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
357 and 559 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
369 and 707 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
408 and 669 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
415 and 628 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
442 and 760 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
530 and 837 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
619 and 858 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
657 and 714 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
747 and 818 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
805 and 820 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.
840 and 909 serve one area: a number there can carry either code, so the area code alone does not place a number more precisely than the area.

What the NANPA central office code report holds for California

area codes	41
allocated codes	22,129 central office codes, 10,000 numbers each
rate centres	737
pooled codes	16,092 (72.7%)
codes assigned since 2025-11-11	345
thousands-blocks assigned since 2025-11-11	4,629

A pooled code is split into thousands-blocks of 1,000 numbers that other carriers may hold. The twelve months run to the table’s own date, so the figures change only when the table does.

Allocated codes by network brand

Each code is counted under the holder the NANPA central office code report lists for it, grouped under today’s network brand. That is the code’s original allocation, never who serves a number today, since numbers move between carriers, and the shares are shares of the regulator’s table, not of subscribers or traffic. In a pooled code the thousands-blocks can be held by other carriers; this counts the code’s holder.

brand	codes	share
AT&T	7,805	35.3%
T-Mobile	2,904	13.1%
Verizon	2,857	12.9%
Inteliquent	1,698	7.7%
Lumen	1,278	5.8%
Frontier	1,154	5.2%
Bandwidth	812	3.7%
TPx	613	2.8%
Not under a listed brand (78 holders)	3,008	13.6%

Where these figures come from

The codes, rate centres, pooling and assignment dates are counted from the NANPA central office code report of 2026-11-10, and the area codes, overlays and in-service dates from NANPA’s NPA report of 2026-11-10. Counts only: no row of either file is republished here. The publisher, its files and its terms are on the data source page. Every area code of the United States is on the United States page, the codes put in service lately or still to come across North America on new and upcoming area codes, and any number can be read on the free phone number lookup.

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