US state Verified Nov 1, 2026 · Source: NANPA

California area codes

California uses 41 area codes. The oldest is 213, in service since 1947; the newest is 357, from 2025. Across them 22,122 of 32,226 possible number blocks are allocated, 68.6% of capacity. 408, 213, 310, 323, 805, 909, 415, 510, 559, 619, 707, 714, 760, 916, 209, 530, 818 and 949 are at or past 95%, which is why new numbers there come from overlays rather than the original code. AT&T holds 35.3% of the 22,122 assigned blocks across the state, ahead of T-Mobile at 13.0%; a further 8.0% sits with CLEC and VoIP holders outside the national carriers. In the 33 days to 30 October 2026, FTC complaints named a California caller ID 24,182 times – 10.6% of all complaints in the window, most often 707 with 1,431 (7th of 422 nationally). NANPA has relief planning under way for 626, 657, 714 and 949, so more codes are coming. NANPA records 1,123 rate centers across the state's codes.

All 41 codes

Code	In service	Blocks used	Largest holder	Complaints	Shares area with
209	1958	784/786	AT&T 40.9%	933	350
213	1947	786/786	AT&T 28.4%	925	323, 738
279	2018	151/786	Other CLEC / VoIP 35.1%	272	916
310	1991	786/786	AT&T 43.6%	454	424
323	1998	786/786	AT&T 41.6%	677	213, 738
341	2019	113/786	Other CLEC / VoIP 38.9%	220	510
350	2022	88/786	Onvoy 22.7%	54	209
357	2025	9/786	Onvoy 55.6%	–	559
369	2023	55/786	AT&T 23.6%	48	707
408	1959	787/786	AT&T 53.9%	682	669
415	1947	785/786	AT&T 53%	768	628
424	2006	460/786	T-Mobile 21.1%	631	310
442	2009	356/786	Other CLEC / VoIP 25%	245	760
510	1991	785/786	AT&T 48%	775	341
530	1997	782/786	AT&T 35.9%	821	837
559	1998	785/786	AT&T 41%	698	357
562	1997	702/786	Frontier 22.5%	800	no overlay
619	1982	785/786	AT&T 39%	682	858
626 overlay coming	1997	737/786	AT&T 30.5%	919	no overlay
628	2015	193/786	Other CLEC / VoIP 26.9%	419	415
650	1997	717/786	AT&T 50.8%	663	no overlay
657 overlay coming	2008	703/786	Verizon 53.3%	472	714
661	1999	674/786	AT&T 35.9%	648	no overlay
669	2012	238/786	T-Mobile 20.6%	255	408
707	1959	785/786	AT&T 40.4%	1,431	369
714 overlay coming	1951	785/786	AT&T 46%	608	657
738	2024	30/786	Onvoy 63.3%	30	213, 323
747	2009	260/786	T-Mobile 23.5%	379	818
760	1997	785/786	AT&T 28.5%	1,010	442
805	1957	786/786	AT&T 29.1%	881	820
818	1984	781/786	AT&T 47.4%	778	747
820	2018	98/786	Other CLEC / VoIP 46.9%	135	805
831	1998	406/786	AT&T 42.9%	458	no overlay
837	2025	11/786	Onvoy 54.5%	–	530
840	2021	130/786	Other CLEC / VoIP 25.4%	137	909
858	1999	564/786	AT&T 41.7%	620	619
909	1992	786/786	Frontier 19.8%	845	840
916	1947	785/786	AT&T 43.6%	787	279
925	1998	640/786	AT&T 43.8%	948	no overlay
949 overlay coming	1998	747/786	AT&T 37.1%	1,387	no overlay
951	2004	696/786	AT&T 23.9%	687	no overlay

Block share is share of allocated number blocks, not of subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and reflect spoofed caller IDs as much as real calls.

How full California’s codes are

A code holds at most 786 blocks of 10,000 numbers each. When a code fills up, the administrator does not reclaim numbers – it adds an overlay, and from then on new numbers in the same area come from the new code.

68.6% of capacity allocated – 22,122 of 32,226 blocks

18 codes at or past 95% – effectively closed to new numbers

10,104 blocks still unallocated across the state

Full or nearly full

408 – 100.1%213 – 100%310 – 100%323 – 100%805 – 100%909 – 100%415 – 99.9%510 – 99.9%559 – 99.9%619 – 99.9%707 – 99.9%714 – 99.9%760 – 99.9%916 – 99.9%209 – 99.7%530 – 99.5%818 – 99.4%949 – 95%

Most room left

357 – 777 blocks free 837 – 775 blocks free 738 – 756 blocks free

Who holds the number blocks

Counted from every assigned block in the state: 22,122 blocks, each with the holder NANPA recorded for it. Percentages are measured, not estimated.

Holder	Blocks	Share of California	Largest in
AT&T	7,805	35.3%	25 codes
T-Mobile	2,879	13%	3 codes
Verizon	2,854	12.9%	1 code
Other CLEC / VoIP	1,777	8%	6 codes
Onvoy	1,536	6.9%	4 codes
Lumen	1,279	5.8%	–
Frontier	1,154	5.2%	2 codes
Bandwidth	812	3.7%	–
TPx	613	2.8%	–
Charter	300	1.4%	–
Spok	244	1.1%	–
Comcast	210	0.9%	–

“Other CLEC / VoIP” is not one company: it is every holder outside the national carriers counted together, which is what resellers and app-based numbers look like in the records. This is allocation, not subscribers.

Spam complaints naming California codes

FTC Do Not Call complaints where the caller ID shown was a California number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are routinely faked, so these are complaints about the code, not calls proven to come from it.

24,182 complaints in 33 days

10.6% of all US complaints in the window

#7 best-known offender: 707, of 422 ranked codes

Code	Complaints	National rank
707	1,431	#7 of 422
949	1,387	#9 of 422
760	1,010	#39 of 422
925	948	#48 of 422
209	933	#50 of 422

What people said the calls were about

Other – 1,926
Reducing your debt (credit cards, mortgage, student loans) – 1,428
Dropped call or no message – 467
Calls pretending to be government, businesses, or family and friends – 416

Topics as the complainant chose them, for the codes where the FTC published a topic.

What is coming next

NANPA has relief planning open for 626, 657, 714, 949 – the step that comes before a new overlay is announced. Watch these codes if you need to know whether dialing or new-number availability is about to change.

How California got its codes

3 in the 1940s, 5 in the 1950s, 2 in the 1980s, 15 in the 1990s, 5 in the 2000s, 5 in the 2010s, 6 in the 2020s. Each code after the first was split off from or overlaid on one already in service.

1947 213 goes into service.
1947 415 goes into service.
1947 916 goes into service.
1951 714 goes into service, split from or overlaid on 213.
1957 805 goes into service, split from or overlaid on 213.
1958 209 goes into service, split from or overlaid on 415.
1959 408 goes into service, split from or overlaid on 415.
1959 707 goes into service, split from or overlaid on 415.
1982 619 goes into service, split from or overlaid on 714.
1984 818 goes into service, split from or overlaid on 213.
1991 310 goes into service, split from or overlaid on 213.
1991 510 goes into service, split from or overlaid on 415.
1992 909 goes into service, split from or overlaid on 714.
1997 530 goes into service, split from or overlaid on 916.
1997 562 goes into service, split from or overlaid on 310.
1997 626 goes into service, split from or overlaid on 818.
1997 650 goes into service, split from or overlaid on 415.
1997 760 goes into service, split from or overlaid on 619.
1998 323 goes into service, split from or overlaid on 213.
1998 559 goes into service, split from or overlaid on 209.
1998 831 goes into service, split from or overlaid on 408.
1998 925 goes into service, split from or overlaid on 510.
1998 949 goes into service, split from or overlaid on 714.
1999 661 goes into service, split from or overlaid on 805.
1999 858 goes into service, split from or overlaid on 619.
2004 951 goes into service, split from or overlaid on 909.
2006 424 goes into service, split from or overlaid on 310.
2008 657 goes into service, split from or overlaid on 714.
2009 442 goes into service, split from or overlaid on 760.
2009 747 goes into service, split from or overlaid on 818.
2012 669 goes into service, split from or overlaid on 408.
2015 628 goes into service, split from or overlaid on 415.
2018 279 goes into service, split from or overlaid on 916.
2018 820 goes into service, split from or overlaid on 805.
2019 341 goes into service, split from or overlaid on 510.
2021 840 goes into service, split from or overlaid on 909.
2022 350 goes into service, split from or overlaid on 209.
2023 369 goes into service, split from or overlaid on 707.
2024 738 goes into service, split from or overlaid on 323.
2025 357 goes into service, split from or overlaid on 559.
2025 837 goes into service, split from or overlaid on 530.

Time zones

California is in Pacific time.

Frequently asked about California area codes

How many area codes does California have?

41 in service. They are 209, 213, 279, 310, 323, 341, 350, 357, 369, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 738, 747, 760, 805, 818, 820, 831, 837, 840, 858, 909, 916, 925, 949 and 951.

What is the oldest area code in California?

213, in service since 1947. Every later code in the state was split off from or overlaid on an existing one.

What is the newest area code in California?

357, from 2025, overlaying 559.

Is California getting a new area code?

Probably. No new code is assigned yet, but NANPA lists relief planning under way for 626, 657, 714 and 949, which is the step before a new overlay is announced.

What time zone is California in?

Pacific time.

Which California area code gets the most spam complaints?

707 – 1,431 FTC complaints in the 33 days to 30 October 2026, 7th of 422 codes nationally. Those are complaints about the caller ID shown, and spam callers routinely fake a local-looking number, so this says the code is imitated often, not that the calls come from there.

Which carrier holds the most California numbers?

AT&T, with 35.3% of the 22,122 blocks assigned across California, ahead of T-Mobile at 13.0%. This is allocation of blocks by the numbering administrator, not a count of subscribers – people keep their numbers when they switch carriers.

Sources and verification

NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026

Figures on this page are counted from those files, not copied from other sites. Spotted an error? Request a correction. How we collect and check: methodology.