California · Pacific Time
424 Area Code
Area code 424 is in California, serving west Los Angeles, the Westside, beach cities and South Bay of Los Angeles County. It is in the Pacific Time zone. It shares its territory with overlay code 310, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 424 area code?
424 is a California area code covering west Los Angeles, the Westside, beach cities and South Bay of Los Angeles County. In the wider directory it sits in the West region.
Cities in the 424 area code
- Los Angeles
- Torrance
- Santa Monica
- Inglewood
- Carson
- Compton
- Hawthorne
- Redondo Beach
- Gardena
- Culver City
- Beverly Hills
- Manhattan Beach
- Malibu
Counties served by 424
Los Angeles County.
424 overlay codes and dialing
The 424 territory is covered by an overlay of 2 area codes: 310, 424. All of them serve the same geographic area, and the original code is 310. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 424 area code
424 went into service on August 26, 2006 as an overlay of 310, relieving number exhaustion in the Los Angeles area. Rather than splitting the region, the overlay lets existing customers keep their numbers while new lines draw from the added code. Learn more in our overlay guide.
Is 424 a scam or spam risk?
424 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 424 number on your screen is no guarantee the caller is in Los Angeles, CA or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other California area codes
Explore more
See every code in California, compare codes across the West region, or view all Pacific Time codes. You can also browse the 4XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
424 area code FAQ
Where is the 424 area code?
The 424 area code is in California, covering west Los Angeles, the Westside, beach cities and South Bay of Los Angeles County, in the West region.
What cities are in the 424 area code?
Cities in the 424 area code include Los Angeles, Torrance, Santa Monica, Inglewood, Carson, Compton, Hawthorne, Redondo Beach, Gardena and Culver City.
What time zone is 424 in?
424 is in the Pacific Time zone.
What is the overlay for the 424 area code?
424 shares its territory with 310. Both codes (310, 424) serve the same area, so 10-digit dialing is required for every call.
When did the 424 area code start?
424 went into service on August 26, 2006 as an overlay of 310.
Do I have to dial 10 digits for 424?
Yes. Because 424 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 424 a toll-free or premium code?
No. 424 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.