738 area code — Los Angeles:da 04, CA geographic

Data: NANPA public reports, current as of July 28, 2026.

Area code 738 is a geographic code serving Los Angeles:da 04, California in the Pacific time zone. It has been in service since November 1, 2024. The same territory is also served by its overlay codes (213/323/738 complex). Keep in mind the code identifies where the number was registered; the person calling may be elsewhere.

The code currently holds 15 working prefixes, held by 4 different carriers. Of these, 15 are pooled prefixes shared by multiple carriers. Numbers are anchored to 10 rate centers — billing localities that fix where each prefix belongs.

The code was carved out of 323 (2024).

The current NANPA exhaust forecast for the 213/323/738 complex is 3Q 2042.

Local calls inside 738 are dialed 1+10D.

To check where a specific 738 number was issued, look up its six-digit prefix; to check who is actually calling, ignore the display and verify through an official callback number — caller ID is assertable and routinely spoofed.

Largest localities in 738

FAQ

Where is a 738 number from?

738 is assigned to Los Angeles:da 04 and surrounding areas of California in the Pacific time zone. The three digits after the area code (the prefix) narrow it down to a rate center.

Is 738 a toll-free number?

No. 738 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.

Why do 213 and 738 cover the same place?

They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 213/323/738 complex shares one service area, and local calls are dialed with 10 digits.

Will 738 run out of numbers?

NANPA's current forecast projects exhaust in 3Q 2042 — decades of capacity remain.