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Area code 738

Area code 738 Los Angeles, California

Area code 738 is one of the newer area codes, added in 2024 to California, with numbers assigned in Los Angeles, Montebello. It’s 9:14 PM there now.

State
California41 area codes in California
Time zone
Pacific9:14 PM there now
Exchanges
292 places
Overlay
213 and 323Same area, 10-digit dialing
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Where area code 738 is

Numbers in 738 are assigned to 2 places in 1 county: Los Angeles County.

Los Angeles holds most of them: 93% of the exchanges.

  • Los Angeles27
  • Montebello2

Phone companies in 738

29 blocks of numbers in 738 are held by 8 phone companies. The most belong to Inteliquent (18), Wide Voice (4) and T-Mobile (2).

A large share, about 90%, belongs to competitive and internet phone carriers; wireless networks hold 10% and local phone and cable companies 0%.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

738 went into service in 2024, added to the area of 323.

213 (since 1947) and 323 (since 1998) share the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.

29 new exchanges were assigned since 2021, the latest in October 2026.

Calling 738

It’s 9:14 PM Pacific time in 738 right now.

From elsewhere in the U.S., dial 1, 738 and the 7-digit number; inside the area, all 10 digits too.

Nearby area codes

California has 41 area codes: 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.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 738 area code

Map of the 738 area code around Los Angeles and Montebello, California.

Interactive map © OpenStreetMap contributors

Cities on the map

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Questions about 738

Where is area code 738?

In California, covering Los Angeles and Montebello across 1 county.

What time zone is 738 in?

Pacific time. It was 9:14 PM there when this page loaded.

Is 738 an overlay?

Yes. 213 and 323 serve the same area, so dial all 10 digits for local calls.

Which phone companies have 738 numbers?

8 companies hold blocks; the most belong to Inteliquent, Wide Voice and T-Mobile. About 10% of blocks are wireless.

Is 738 running out of numbers?

Not on record. 29 new exchanges have been assigned since 2021.