Caller ID for
Area code 909
Area code 909 Ontario, California
Area code 909 is in California, with numbers assigned in Ontario, San Bernardino, Fontana and 19 more places. It’s 9:13 PM there now.
- State
- California41 area codes in California
- Time zone
- Pacific9:13 PM there now
- Exchanges
- 78622 places
- Overlay
- 840Same area, 10-digit dialing
- No sign-up
- We never contact the number
- Spam risk included
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Where area code 909 is
Numbers in 909 are assigned to 22 places in 3 counties: San Bernardino County, Los Angeles County and Riverside County.
No single place dominates: Ontario, the largest, has 16% of the exchanges.
- Ontario124
- San Bernardino88
- Fontana70
- Upland70
- Chino55
- Pomona51
- Claremont50
- Colton45
- Redlands38
- Rialto34
- Diamond Bar28
- Highland20
- Calimesa13
- Mentone12
- Big Bear Lake8
- Riverside7
- Crestline7
- Big Bear City7
- Running Springs5
- Hemet2
- Corona2
- Woodcrest1
Phone companies in 909
786 blocks of numbers in 909 are held by 33 phone companies. The most belong to Frontier (156), T-Mobile (139) and AT&T Mobility (75).
A mix: about 38% wireless, 28% local phone and cable and 34% other carriers, including internet phone services.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
909 went into service in 1992, added to the area of 714.
840 (since 2021) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.
18 new exchanges were assigned since 2021, the latest in October 2025.
Calling 909
It’s 9:13 PM Pacific time in 909 right now.
From elsewhere in the U.S., dial 1, 909 and the 7-digit number; inside the area, all 10 digits too.
Nearby area codes
California has 41 area codes: 209, 213, 279, 310, 323, 341, 350, 357, 369, 408, 415, 424, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 738, 747, 760, 805, 818, 820, 831, 837, 840, 858, 909, 916, 925, 949 and 951.
- 951 · Riverside, CA · same area
- 714 · Anaheim, CA · about 29 mi
- 760 · Oceanside, CA · about 30 mi
- 657 · Anaheim, CA · about 30 mi
- 626 · Alhambra, CA · about 31 mi
- 949 · Irvine, CA · about 35 mi
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
Map of the 909 area code
Map of the 909 area code around Ontario, San Bernardino and Fontana, California.
Cities on the map
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Questions about 909
Where is area code 909?
In California, covering Ontario, San Bernardino and Fontana and other places across 3 counties.
What time zone is 909 in?
Pacific time. It was 9:13 PM there when this page loaded.
Is 909 an overlay?
Yes. 840 serves the same area, so dial all 10 digits for local calls.
Which phone companies have 909 numbers?
33 companies hold blocks; the most belong to Frontier, T-Mobile and AT&T Mobility. About 38% of blocks are wireless.
Is 909 running out of numbers?
Not on record. 18 new exchanges have been assigned since 2021.