🇺🇸 310 area code
Area code 310 covers California, Los Angeles, Santa Monica and Torrance and the surrounding area in California. It shares that territory with 424, so the same neighbourhood can have numbers in any of them. Enter a 310 number below for a free check before you call back.
- Location: California
- Time zone: Pacific
- In service since November 2, 1991
Look up a number
Validity, carrier, line type, and region on the first pass.
Area code 310 at a glance
- Area code
- 310
- Location
- California, United States
- Main cities
- California, Los Angeles, Santa Monica, Torrance, Beverly Hills, Compton
- Time zone
- Pacific
- In service since
- November 2, 1991
- Created from
- 213
- Overlay codes
- 424
- Codes split from it
- 424, 562
- Local calls
- Dial 1 + 10 digits
- Number format
- (310) 555-0123
- From abroad
- +1 310 555 0123
Cities in area code 310
- California
- Los Angeles
- Santa Monica
- Torrance
- Beverly Hills
- Compton
- Gardena
- Hawthorne
- Inglewood
- San Pedro
Is a 310 call a scam?
An area code tells you where a number was first assigned, not where the caller is. Mobile numbers keep their area code when people move, and internet (VoIP) numbers can be picked in any area code — so a 310 number can be calling from anywhere.
Robocallers exploit that with "neighbor spoofing": showing a 310 number to people in California because a local-looking call is more likely to be answered. If a 310 call claims to be your bank, the IRS or a delivery company, hang up and call the official number yourself.
About area code 310
310 entered service on November 2, 1991, when it was split from 213.
It is part of the 310/424 overlay: the codes cover the same area, and a new line there can be given a number in any of them. Two neighbours — or two phones in one household — can have different area codes. That is also why local calls need the full ten digits.
As the region grew, 424 and 562 were carved out of or added to 310.
FAQ
Area code 310 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 310?
Area code 310 is in California, United States. It covers California, Los Angeles, Santa Monica, Torrance, Beverly Hills and Compton.
What time zone is area code 310?
310 is in the Pacific time zone, and does not observe daylight saving time.
What area codes overlay 310?
424 serves the same area as 310. Numbers in all of them are local to one another.
When did area code 310 start?
310 entered service on November 2, 1991, created from 213.
How do I find out who called me from 310?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Why am I getting calls from area code 310?
If you live in or near California, they may be genuinely local — or robocalls spoofing a local-looking number. Unknown 310 callers who will not leave a message are best looked up before you call back.
Got a call from 310?
Run the free check first — validity, carrier, line type and region — and unlock the full report only if you need it.