California area codes — detailed data

NANPA NPA database, current as of July 28, 2026.

This page expands the state overview with per-code operational data from NANPA: parent codes, projected exhaust dates, dialing patterns and relief status for all 41 California codes.

Aggregate footprint: the state's 41 geographic codes currently carry 21,878 active NXX prefixes over 1,092 rate-center anchorings, with 15,839 prefixes in thousands-block pooling. 39 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 209 came out of 415 in 1958; 279 came out of 916 in 2018; 310 came out of 213 in 1991; 323 came out of 213 in 1998; 341 came out of 510 in 2019; 350 came out of 209 in 2022; 357 came out of 559 in 2025; 369 came out of 707 in 2023; 408 came out of 415 in 1959; 424 came out of 310 in 2006; 442 came out of 760 in 2009; 510 came out of 415 in 1991; 530 came out of 916 in 1997; 559 came out of 209 in 1998; 562 came out of 310 in 1997; 619 came out of 714 in 1982; 626 came out of 818 in 1997; 628 came out of 415 in 2015; 650 came out of 415 in 1997; 657 came out of 714 in 2008; 661 came out of 805 in 1999; 669 came out of 408 in 2012; 707 came out of 415 in 1959; 714 came out of 213 in 1951; 738 came out of 323 in 2024; 747 came out of 818 in 2009; 760 came out of 619 in 1997; 805 came out of 213 in 1957; 818 came out of 213 in 1984; 820 came out of 805 in 2018; 831 came out of 408 in 1998; 837 came out of 530 in 2025; 840 came out of 909 in 2021; 858 came out of 619 in 1999; 909 came out of 714 in 1992; 925 came out of 510 in 1998; 949 came out of 714 in 1998; 951 came out of 909 in 2004. The remaining codes (213, 415, 916) date back to the plan's early assignments.

Dialing plans: 39 require 1+ ten digits; 2 still allow seven-digit local calls. Overlay territories always dial ten digits; the 2021 988-hotline transition moved most others to ten digits as well.

The tightest capacity in the state is 657 (complex 657/714), projected to exhaust 2Q 2028.

Status: 3 with relief planning in progress — details in the table.

Code-by-code notes

213 — spawned 714, 805, 818, 310, 323; overlaid by 323/738; exhaust forecast 3Q 2042.

310 — spawned 562, 424; carved from 213; overlaid by 424; exhaust forecast 1Q 2043.

323 — spawned 738; carved from 213; overlaid by 213/738; exhaust forecast 3Q 2042.

714 — spawned 619, 909, 949, 657; carved from 213; overlaid by 657; exhaust forecast 2Q 2028.

805 — spawned 661, 820; carved from 213; overlaid by 820; exhaust forecast 3Q 2074.

909 — spawned 951, 840; carved from 714; overlaid by 840; exhaust forecast 1Q 2056.

408 — spawned 831, 669; carved from 415; overlaid by 669; exhaust forecast 1Q 2056.

619 — spawned 760, 858; carved from 714; overlaid by 858; exhaust forecast 3Q 2039.

760 — spawned 442; carved from 619; overlaid by 442; exhaust forecast 1Q 2043.

916 — spawned 530, 279; overlaid by 279; exhaust forecast 2Q 2063.