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738 Area Code
Area code 738 serves Los Angeles, East Los Angeles, Montebello, Commerce and South San Gabriel in California. It has been in service since November 1, 2024, when it was split from 323.
Who issues 738 numbers
Share of the 29 prefixes (the three digits after 738) assigned to each type of carrier. Classification by carrier name, approximate.
| Carrier | Prefixes |
|---|---|
| Onvoy (Sinch) | 18 |
| Wide Voice | 4 |
| T-Mobile | 2 |
| AT&T Mobility | 1 |
| Opentact | 1 |
| Boost Subscriberco L.L.C. | 1 |
| Exiant Communications | 1 |
| 8X8 | 1 |
Cities and towns in area code 738
| City | Population | Other area codes |
|---|---|---|
| Los Angeles | 3,869,089 | 213, 323, 818, 747 |
| East Los Angeles | 114,617 | 323, 213 |
| Montebello | 60,693 | 323, 213 |
| Commerce | 11,688 | 323, 213 |
| South San Gabriel | 8,084 | 323, 213 |
Got a call from 738?
A 738 number was originally issued in California, but that does not prove the caller is there. 66% of 738 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.
All 29 prefixes in area code 738
Format: (738) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.
738-200T-Mobile · Los Angeles738-201Onvoy (Sinch) · Los Angeles738-202T-Mobile · Los Angeles738-203Onvoy (Sinch) · Los Angeles738-204Onvoy (Sinch) · Los Angeles738-205Onvoy (Sinch) · Los Angeles738-206Onvoy (Sinch) · Los Angeles738-207Onvoy (Sinch) · Los Angeles738-208Onvoy (Sinch) · Los Angeles738-209Onvoy (Sinch) · Los Angeles738-210Onvoy (Sinch) · Los Angeles738-212AT&T Mobility · Los Angeles738-222Onvoy (Sinch) · Los Angeles738-300Opentact · Los Angeles738-333Wide Voice · Montebello738-338Boost Subscriberco L.L.C. · Los Angeles738-444Onvoy (Sinch) · Los Angeles738-500Onvoy (Sinch) · Los Angeles738-529Onvoy (Sinch) · Los Angeles738-600Onvoy (Sinch) · Los Angeles738-666Onvoy (Sinch) · Montebello738-738Exiant Communications · Los Angeles738-777Wide Voice · Los Angeles738-800Onvoy (Sinch) · Los Angeles738-8808X8 · Los Angeles738-888Wide Voice · Los Angeles738-900Onvoy (Sinch) · Los Angeles738-998Onvoy (Sinch) · Los Angeles738-999Wide Voice · Los Angeles
Questions about area code 738
- Where is area code 738?
- Area code 738 is in California. It covers Los Angeles, East Los Angeles, Montebello, Commerce and South San Gabriel.
- What time zone is area code 738?
- Area code 738 is in the Pacific time zone.
- Is 738 a toll-free number?
- No. 738 is a geographic area code in California. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
- Why does 738 share its area with 213 and 323?
- 213, 323 and 738 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
- Will area code 738 run out of numbers?
- NANPA's latest forecast projects the 213/323/738 overlay to exhaust in the third quarter of 2042. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.