The 707 area code covers Santa Rosa, Fairfield and 68 more places in California.
Area code 707 is in California, on Pacific Time. In the 707 area, phone numbers are given out most in Sonoma County, then Solano and Humboldt counties. It has been in service since 1959. 369 covers the same area, so two neighbours can have different area codes.
- Where
- 8 counties in California, mostly Sonoma County, Solano County and Humboldt County
- Time zone
- Pacific Time
- In service since
- 1959
- Shares its area with
- 369 (since 2023)
- Prefixes in use
- 785
- How to dial
- Local calls need 1, then the area code, then the number: 1-707-555-0142.
Find out who called you from a 707 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 (707) number is on today, use our free carrier lookup.
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Santa Rosa holds 18% of the phone prefixes in area code 707.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 785 prefixes in use shows where 707 numbers are actually given out.
- Santa Rosa144 prefixes, 18%
- Fairfield56 prefixes, 7%
- Vallejo50 prefixes, 6%
- Napa43 prefixes, 5%
- Vacaville37 prefixes, 5%
- Eureka36 prefixes, 5%
- Petaluma29 prefixes, 4%
- Ukiah22 prefixes, 3%
Also served: Benicia, Sonoma, Saint Helena and Lakeport and 58 smaller places.
Pacific Bell (AT&T) holds the most phone number prefixes in area code 707: 224 of 785.
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 785 prefixes in use in 707 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 | 224 | 29% |
| AT&T MobilityMobile network | 67 | 9% |
| Level 3 (Lumen)Lumen's business and wholesale network | 62 | 8% |
| T-MobileMobile network | 31 | 4% |
| Metro by T-MobileT-Mobile's prepaid brand | 28 | 4% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 24 | 3% |
| 25 other carriers | 349 | 44% |
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.
707 has been overlaid once since 1959.
1959
707 starts, split off from 415.
2023
On February 1, 2023, 369 is added on top of 707, so new numbers here can get either code.
A 707 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 707 are 530, 916 and 415.
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 707.
Where is area code 707?
707 covers Santa Rosa, Fairfield, Vallejo and Napa and 66 more places in California. In the 707 area, phone numbers are given out most in Sonoma County, then Solano and Humboldt counties.
What state is area code 707 in?
California. 707 is a California area code on Pacific Time.
What cities use area code 707?
The places holding the most 707 prefixes are Santa Rosa, Fairfield, Vallejo, Napa, Vacaville, Eureka, Petaluma and Ukiah, out of 70 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 707?
No single phone company owns 707. NANPA's records show Pacific Bell (AT&T) holds the most 707 prefixes, 224 of 785, followed by AT&T Mobility and Level 3 (Lumen). Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 707 in?
707 is on Pacific Time.
When did area code 707 start?
707 went into service in 1959, when it was split off from 415.
Is 707 the same area as 369?
Yes. 369 (since 2023) covers the same ground as 707. 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 707 number?
Local calls need 1, then the area code, then the number: 1-707-555-0142.
Is 707 a toll-free number?
No. 707 is a regular area code for Santa Rosa and Fairfield 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 707?
The closest are 530/837 (Chico, California), 916/279 (Sacramento, California), 415/628 (San Francisco, California) and 925 (Walnut Creek, California), measured between the centres of each area.
Who called me from a 707 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 707 a scam?
707 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.