The 909 area code covers Ontario, San Bernardino and 21 more places in California.
Area code 909 is in California, on Pacific Time. In the 909 area, phone numbers are given out most in San Bernardino County, then Los Angeles and Riverside counties. It has been in service since November 14, 1992. 840 covers the same area, so two neighbours can have different area codes.
- Where
- 4 counties in California, mostly San Bernardino County, Los Angeles County and Riverside County
- Time zone
- Pacific Time
- In service since
- November 14, 1992
- Shares its area with
- 840 (since 2021)
- Prefixes in use
- 786
- How to dial
- Local calls need 1, then the area code, then the number: 1-909-555-0142.
Find out who called you from a 909 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 (909) number is on today, use our free carrier lookup.
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Ontario holds 16% of the phone prefixes in area code 909.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 786 prefixes in use shows where 909 numbers are actually given out.
- Ontario124 prefixes, 16%
- San Bernardino88 prefixes, 11%
- Fontana70 prefixes, 9%
- Upland70 prefixes, 9%
- Chino55 prefixes, 7%
- Pomona51 prefixes, 6%
- Claremont50 prefixes, 6%
- Colton45 prefixes, 6%
Also served: Redlands, Rialto, Diamond Bar and Highland and 11 smaller places.
Frontier holds the most phone number prefixes in area code 909: 156 of 786.
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 786 prefixes in use in 909 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| FrontierLandline company | 156 | 20% |
| T-MobileMobile network | 87 | 11% |
| AT&T MobilityMobile network | 75 | 10% |
| Pacific Bell (AT&T)AT&T's landline company | 60 | 8% |
| Metro by T-MobileT-Mobile's prepaid brand | 52 | 7% |
| Level 3 (Lumen)Lumen's business and wholesale network | 50 | 6% |
| 26 other carriers | 306 | 39% |
71% 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.
909 has been split once and overlaid once since 1992.
1992
909 starts on November 14, 1992, split off from 714.
2004
On July 17, 2004, 951 splits off and takes part of the 909 area.
2021
On February 23, 2021, 840 is added on top of 909, so new numbers here can get either code.
A 909 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 909 are 951, 714 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 909.
Where is area code 909?
909 covers Ontario, San Bernardino, Fontana and Upland and 19 more places in California. In the 909 area, phone numbers are given out most in San Bernardino County, then Los Angeles and Riverside counties.
What state is area code 909 in?
California. 909 is a California area code on Pacific Time.
What cities use area code 909?
The places holding the most 909 prefixes are Ontario, San Bernardino, Fontana, Upland, Chino, Pomona, Claremont and Colton, out of 23 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 909?
No single phone company owns 909. NANPA's records show Frontier holds the most 909 prefixes, 156 of 786, followed by T-Mobile and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 909 in?
909 is on Pacific Time.
When did area code 909 start?
909 went into service on November 14, 1992, when it was split off from 714.
Is 909 the same area as 840?
Yes. 840 (since 2021) covers the same ground as 909. 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 909 number?
Local calls need 1, then the area code, then the number: 1-909-555-0142.
Is 909 a toll-free number?
No. 909 is a regular area code for Ontario and San Bernardino 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 909?
The closest are 951 (Riverside, California), 714/657 (Anaheim, California), 626 (Alhambra, California) and 949 (Irvine, California), measured between the centres of each area.
Who called me from a 909 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 909 a scam?
909 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.