Phone number reference · United States
310 area code
Western Los Angeles County, including the Westside and South Bay.
310 serves part of Los Angeles County rather than the whole Los Angeles metropolitan area. Its 424 overlay shares the numbering region. Do not use a 310 number alone to decide whether a customer is within a Westside or South Bay service radius.
Westside and South Bay
Geographic code · In service
310 at a glance
- Region
- Westside and South Bay
- Time zone
- Pacific Time
- In service since
- 02-Nov-1991
- Overlay arrangement
- 310/424
Numbering details checked September 21, 2026 against the NANPA database. See the official area-code maps for boundaries.
Questions about 310
How are 310 and 424 related?
424 is an overlay in the 310 region. A 424 number does not indicate a different city from an otherwise comparable 310 number; ask for the actual service address.
Is a 310 call safe to answer?
The 310 prefix identifies a numbering region, not a caller's identity or trustworthiness. Verify an unexpected request by contacting the organization through a number you already know.
Can I get a 310 business number?
Search the available numbers in VeraDial. Inventory changes, so a 310 number is not guaranteed. You can also keep your current carrier number and forward voice calls to a VeraDial line; existing texts stay with your carrier.
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