California · Pacific Time
657 Area Code
Area code 657 is in California, serving northern and western Orange County including Anaheim, Santa Ana and Huntington Beach. It is in the Pacific Time zone. It shares its territory with overlay code 714, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 657 area code?
657 is a California area code covering northern and western Orange County including Anaheim, Santa Ana and Huntington Beach. In the wider directory it sits in the West region.
Cities in the 657 area code
- Anaheim
- Santa Ana
- Huntington Beach
- Garden Grove
- Fullerton
- Orange
- Westminster
- Buena Park
- Tustin
- Yorba Linda
- Placentia
- Brea
- Cypress
- Fountain Valley
Counties served by 657
Orange County.
657 overlay codes and dialing
The 657 territory is covered by an overlay of 2 area codes: 657, 714. All of them serve the same geographic area, and the original code is 714. 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 657 area code
657 went into service on September 23, 2008 as an overlay of 714, relieving number exhaustion in the Anaheim 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 657 a scam or spam risk?
657 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 657 number on your screen is no guarantee the caller is in Anaheim, 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 6XX 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
657 area code FAQ
Where is the 657 area code?
The 657 area code is in California, covering northern and western Orange County including Anaheim, Santa Ana and Huntington Beach, in the West region.
What cities are in the 657 area code?
Cities in the 657 area code include Anaheim, Santa Ana, Huntington Beach, Garden Grove, Fullerton, Orange, Westminster, Buena Park, Tustin and Yorba Linda.
What time zone is 657 in?
657 is in the Pacific Time zone.
What is the overlay for the 657 area code?
657 shares its territory with 714. Both codes (657, 714) serve the same area, so 10-digit dialing is required for every call.
When did the 657 area code start?
657 went into service on September 23, 2008 as an overlay of 714.
Do I have to dial 10 digits for 657?
Yes. Because 657 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 657 a toll-free or premium code?
No. 657 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.