The 951 area code covers Riverside, Corona and 13 more places in California.
Area code 951 is in California, on Pacific Time. In the 951 area, phone numbers are given out most in Riverside County, then San Bernardino County. It has been in service since July 17, 2004.
- Where
- Riverside County and San Bernardino County, California
- Time zone
- Pacific Time
- In service since
- July 17, 2004
- Shares its area with
- No other area code
- Prefixes in use
- 696
- How to dial
- Local calls need 1, then the area code, then the number: 1-951-555-0142.
Find out who called you from a 951 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 (951) number is on today, use our free carrier lookup.
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Riverside holds 21% of the phone prefixes in area code 951.
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 951 numbers are actually given out.
- Riverside148 prefixes, 21%
- Corona88 prefixes, 13%
- Temecula58 prefixes, 8%
- Perris55 prefixes, 8%
- Moreno Valley52 prefixes, 7%
- Murrieta39 prefixes, 6%
- Hemet38 prefixes, 5%
- Lake Elsinore22 prefixes, 3%
Also served: Sun City, Mira Loma, Banning and San Jacinto and 3 smaller places.
T-Mobile holds the most phone number prefixes in area code 951: 120 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 951 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| T-MobileMobile network | 120 | 17% |
| Pacific Bell (AT&T)AT&T's landline company | 77 | 11% |
| AT&T MobilityMobile network | 76 | 11% |
| FrontierLandline company | 69 | 10% |
| Level 3 (Lumen)Lumen's business and wholesale network | 43 | 6% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 32 | 5% |
| 24 other carriers | 279 | 40% |
78% 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.
951 has covered the same ground since 2004.
2004
951 starts on July 17, 2004, split off from 909.
A 951 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 951 are 909, 949 and 714.
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 951.
Where is area code 951?
951 covers Riverside, Corona, Temecula and Perris and 11 more places in California. In the 951 area, phone numbers are given out most in Riverside County, then San Bernardino County.
What state is area code 951 in?
California. 951 is a California area code on Pacific Time.
What cities use area code 951?
The places holding the most 951 prefixes are Riverside, Corona, Temecula, Perris, Moreno Valley, Murrieta, Hemet and Lake Elsinore, 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 951?
No single phone company owns 951. NANPA's records show T-Mobile holds the most 951 prefixes, 120 of 696, followed by Pacific Bell (AT&T) and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 951 in?
951 is on Pacific Time.
When did area code 951 start?
951 went into service on July 17, 2004, when it was split off from 909.
How do I dial a 951 number?
Local calls need 1, then the area code, then the number: 1-951-555-0142.
Is 951 a toll-free number?
No. 951 is a regular area code for Riverside and Corona 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 951?
The closest are 909/840 (Ontario, California), 949 (Irvine, California), 714/657 (Anaheim, California) and 626 (Alhambra, California), measured between the centres of each area.
Who called me from a 951 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 951 a scam?
951 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.