310 Area CodeLos Angeles, CA
Area code 310 covers Los Angeles and nearby communities in California, in the Pacific Time (PT) zone, home to about 5.1 million people across 34 cities. It overlays 424, so the same region uses both and every local call needs all ten digits.
Overview
- Major City
- Los Angeles
- State
- California (CA)
- Timezone
- Pacific Time (PT)
- Current Time
- Overlay
- Yes – shares area with 424
Where is area code 310?
Area code 310 serves part of Los Angeles, CA and the surrounding areas. It has a single overlay (424) that serves the same area.
Overview of the 310 Area Code
What is the 310 area code?
The 310 area code serves Los Angeles, California, alongside other established area codes. When you see a 310 number, it indicates a local number within this geographic area.
Why was area code 310 created?
The 310 area code was introduced as an overlay to add numbers in Los Angeles once the existing area code 424 began to run out of available prefixes. It added a new supply of numbers without requiring current residents to change their existing digits.
Geographic Coverage of the 310 Area Code
The 310 area code serves Los Angeles and surrounding areas in California. It operates within the Pacific Time (PT) time zone. It complements the coverage of area code 424. This area code covers several key cities, including:
- Los Angeles
- Torrance
- Inglewood
- Carson
- Compton
- Santa Monica
Got a call from a 310 number? It came from Los Angeles, CA. Since 310 overlays with 424, every local call in the region needs all ten digits to land on the right line. Inside 310, Los Angeles holds about 76% of the population; the rest is split across 33 smaller cities.
Los Angeles Area Codes Overview
Los Angeles is served by multiple area codes, reflecting its telecommunications needs. The 310 area code operates alongside 424. Here are the area codes serving this region:
The introduction of the 310 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 310 cover?
| City | State | Population | % of Area Code | % of City |
|---|---|---|---|---|
| Los Angeles | CA | 3,878,704 | 15% | 30% |
| Torrance | CA | 139,576 | 2% | 100% |
| Inglewood | CA | 102,774 | 1% | 76% |
| Carson | CA | 91,358 | 2% | 96% |
| Compton | CA | 91,129 | 1% | 100% |
| Santa Monica | CA | 90,729 | 1% | 100% |
| Hawthorne | CA | 83,633 | 1% | 91% |
| Redondo Beach | CA | 68,075 | 1% | 100% |
| Lynwood | CA | 63,596 | 0% | 94% |
| Gardena | CA | 58,921 | 1% | 100% |
* Sources: Population – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 310 been reported for unwanted calls?
Yes – 442 unwanted-call complaints were reported to the FTC for numbers showing a 310 area code (May 29 – Jul 2, 2026).
- 57% robocalls
- ↑ 11% vs prior period
Most-reported subjects
- Other45%201
- Dropped call or no message20%88
- Reducing your debt (credit cards, mortgage, student loans)7%31
* Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-07-05.
Which prefixes and exchanges belong to area code 310?
79% assigned to a telco
- 72% Landline
- 28% Wireless
- 0% Unknown
| Prefix | Usage | Carrier |
|---|---|---|
| (310)200- | Wireless | New Cingular Wireless Pcs |
| (310)201- | Landline | Pacific Bell |
| (310)202- | Landline | Pacific Bell |
| (310)203- | Landline | Pacific Bell |
| (310)204- | Landline | Pacific Bell |
| (310)205- | Landline | Pacific Bell |
| (310)206- | Landline | Frontier California |
| (310)207- | Landline | Frontier California |
| (310)208- | Landline | Frontier California |
| (310)209- | Landline | Frontier California |
Frequently Asked Questions about the 310 Area Code
Who called me from a 310 number?
A 310 number is assigned to Los Angeles, California, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 310 code to look nearby, so a 310 number doesn't prove the caller is local. Recently, 442 unwanted-call complaints were reported to the FTC for numbers showing the 310 code (57% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 310 a scam area code?
No area code is a scam on its own. 310 is a normal, officially assigned code for Los Angeles, California. Spam callers spoof local codes to raise the odds you answer, so 310 on your caller ID says nothing about who is really calling. Recently, 442 unwanted-call complaints were reported to the FTC for numbers showing the 310 code (57% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 310 area code?
Repeated calls from different 310 numbers are usually spoofing: a robocaller rotates through 310 numbers so each call looks local and slips past simple blocks. Recently, 442 unwanted-call complaints were reported to the FTC for numbers showing the 310 code (57% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 310 number?
If you aren't expecting a 310 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 310 area code?
Block a single 310 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 310 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 310?
Area code 310 covers Los Angeles and the surrounding area in California, spanning 34 cities with about 5,111,895 residents. It shares its area with overlay code 424.
Is 310 a real area code?
Yes. 310 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Los Angeles, California. A real code can still show up on spoofed spam calls, so treat unknown 310 calls with normal caution.
What timezone is the 310 area code in?
The 310 area code is in the Pacific Time (PT). Because a number can be kept when someone moves or switches to VoIP, a specific 310 caller may not be in that zone.
How do I call a 310 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 310 and the seven-digit number. From a mobile phone you can usually just enter +1 310 followed by the number and let the phone add the exit code for you.