The 661 area code covers Bakersfield, Santa Clarita and 20 more places in California.
Area code 661 is in California, on Pacific Time. In the 661 area, phone numbers are given out most in Kern County, then Los Angeles and Tulare counties. It has been in service since February 13, 1999.
- Where
- Kern County, Los Angeles County and Tulare County, California
- Time zone
- Pacific Time
- In service since
- February 13, 1999
- Shares its area with
- No other area code
- Prefixes in use
- 674
- How to dial
- Local calls inside 661 can still be dialed with just 7 digits.
Find out who called you from a 661 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 (661) number is on today, use our free carrier lookup.
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Bakersfield holds 34% of the phone prefixes in area code 661.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 674 prefixes in use shows where 661 numbers are actually given out.
- Bakersfield229 prefixes, 34%
- Santa Clarita96 prefixes, 14%
- Palmdale96 prefixes, 14%
- Lancaster56 prefixes, 8%
- Delano23 prefixes, 3%
- Arvin22 prefixes, 3%
- Edwards13 prefixes, 2%
- Tehachapi13 prefixes, 2%
Also served: Taft, Mojave, Agua Dulce and Lebec and 10 smaller places.
Pacific Bell (AT&T) holds the most phone number prefixes in area code 661: 145 of 674.
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 674 prefixes in use in 661 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Pacific Bell (AT&T)AT&T's landline company | 145 | 22% |
| AT&T MobilityMobile network | 75 | 11% |
| T-MobileMobile network | 55 | 8% |
| Level 3 (Lumen)Lumen's business and wholesale network | 52 | 8% |
| Metro by T-MobileT-Mobile's prepaid brand | 37 | 5% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 29 | 4% |
| 39 other carriers | 281 | 42% |
79% 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.
661 has covered the same ground since 1999.
1999
661 starts on February 13, 1999, split off from 805.
A 661 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 661 are 818, 805 and 213.
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 661.
Where is area code 661?
661 covers Bakersfield, Santa Clarita, Palmdale and Lancaster and 18 more places in California. In the 661 area, phone numbers are given out most in Kern County, then Los Angeles and Tulare counties.
What state is area code 661 in?
California. 661 is a California area code on Pacific Time.
What cities use area code 661?
The places holding the most 661 prefixes are Bakersfield, Santa Clarita, Palmdale, Lancaster, Delano, Arvin, Edwards and Tehachapi, out of 22 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 661?
No single phone company owns 661. NANPA's records show Pacific Bell (AT&T) holds the most 661 prefixes, 145 of 674, followed by AT&T Mobility and T-Mobile. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 661 in?
661 is on Pacific Time.
When did area code 661 start?
661 went into service on February 13, 1999, when it was split off from 805.
How do I dial a 661 number?
Local calls inside 661 can still be dialed with just 7 digits.
Is 661 a toll-free number?
No. 661 is a regular area code for Bakersfield and Santa Clarita 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 661?
The closest are 818/747 (Van Nuys, California), 805/820 (Santa Barbara, California), 213/323/738 (Los Angeles, California) and 626 (Alhambra, California), measured between the centres of each area.
Who called me from a 661 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 661 a scam?
661 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.