The 657 area code covers the same area as 714, including Anaheim, Santa Ana and 13 more places in California.
Area code 657 is in California, on Pacific Time. In the 657 area, phone numbers are given out in Orange County. It has been in service since September 23, 2008. 714 covers the same area, so two neighbours can have different area codes.
- Where
- Orange County, California
- Time zone
- Pacific Time
- In service since
- September 23, 2008
- Shares its area with
- 714 (since 1951)
- Prefixes in use
- 696
- How to dial
- Local calls need 1, then the area code, then the number: 1-657-555-0142.
- Coming next
- NANPA is planning a new code for this area
Find out who called you from a 657 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (657) number is on today, use our free carrier lookup.
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Anaheim holds 23% of the phone prefixes in area code 657.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 696 prefixes in use shows where 657 numbers are actually given out.
- Anaheim160 prefixes, 23%
- Huntington Beach139 prefixes, 20%
- Santa Ana118 prefixes, 17%
- Westminster60 prefixes, 9%
- Silverado53 prefixes, 8%
- Orange42 prefixes, 6%
- Garden Grove30 prefixes, 4%
- Cypress27 prefixes, 4%
Also served: Placentia, Buena Park, Brea and Yorba Linda and 3 smaller places.
Of the carriers named here, T-Mobile holds the most phone number prefixes in area code 657: 74 of 696.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 696 prefixes in use in 657 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| T-MobileMobile network | 74 | 11% |
| AT&T MobilityMobile network | 47 | 7% |
| Fractel | 40 | 6% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 35 | 5% |
| Level 3 (Lumen)Lumen's business and wholesale network | 17 | 2% |
| Peerless NetworkWholesale phone carrier | 14 | 2% |
| 21 other carriers | 469 | 67% |
100% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
657 started in 2008 as an overlay on 714, and its ground has not changed since.
2008
657 starts on September 23, 2008, as an overlay on 714: new numbers on the same ground.
Now
NANPA is planning another new code for the 657 area.
A 657 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 657 are 562, 949 and 626.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
California has 40 other area codes.
These are the questions people ask most about area code 657.
Where is area code 657?
657 covers Anaheim, Santa Ana, Orange and Huntington Beach and 11 more places in California. In the 657 area, phone numbers are given out in Orange County.
What state is area code 657 in?
California. 657 is a California area code on Pacific Time.
What cities use area code 657?
The places holding the most 657 prefixes are Anaheim, Santa Ana, Orange, Huntington Beach, Westminster, Fullerton, Garden Grove and Cypress, out of 15 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 657?
No single phone company owns 657. NANPA's records list its 696 prefixes across many carriers, and the ones named on this page include T-Mobile, AT&T Mobility and Fractel. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 657 in?
657 is on Pacific Time.
When did area code 657 start?
657 went into service on September 23, 2008, as an overlay on 714: new numbers for the same area.
Is 657 the same area as 714?
Yes. 714 (since 1951) covers the same ground as 657. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 657 number?
Local calls need 1, then the area code, then the number: 1-657-555-0142.
Is 657 a toll-free number?
No. 657 is a regular area code for Anaheim and Santa Ana in California, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 657?
The closest are 562 (Long Beach, California), 949 (Irvine, California), 626 (Alhambra, California) and 213/323/738 (Los Angeles, California), measured between the centres of each area.
Who called me from a 657 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 657 a scam?
657 is a real California area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.