🇺🇸 909 area code
Area code 909 covers Rancho Cucamonga, Ontario, Fontana and Chino and the surrounding area in California. It shares that territory with 840, so the same neighbourhood can have numbers in any of them. Enter a 909 number below for a free check before you call back.
- Location: Rancho Cucamonga, California
- Time zone: Pacific (UTC−8)
- In service since November 14, 1992
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Area code 909 at a glance
- Area code
- 909
- Location
- California, United States
- Main cities
- Rancho Cucamonga, Ontario, Fontana, Chino, Upland, Pomona
- Time zone
- Pacific (UTC−8)
- Local time now
- —
- In service since
- November 14, 1992
- Created from
- 714
- Overlay codes
- 840
- Codes split from it
- 840, 951
- Local calls
- Dial 1 + 10 digits
- Number format
- (909) 555-0123
- From abroad
- +1 909 555 0123
Cities in area code 909
- Rancho Cucamonga
- Ontario
- Fontana
- Chino
- Upland
- Pomona
- Redlands
- Rialto
- San Bernardino
- Walnut
Is a 909 call a scam?
An area code tells you where a number was first assigned, not where the caller is. Mobile numbers keep their area code when people move, and internet (VoIP) numbers can be picked in any area code — so a 909 number can be calling from anywhere.
Robocallers exploit that with "neighbor spoofing": showing a 909 number to people in California because a local-looking call is more likely to be answered. If a 909 call claims to be your bank, the IRS or a delivery company, hang up and call the official number yourself.
About area code 909
909 entered service on November 14, 1992, when it was split from 714.
It is part of the 840/909 overlay: the codes cover the same area, and a new line there can be given a number in any of them. Two neighbours — or two phones in one household — can have different area codes. That is also why local calls need the full ten digits.
As the region grew, 840 and 951 were carved out of or added to 909.
よくある質問
Area code 909 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 909?
Area code 909 is in California, United States. It covers Rancho Cucamonga, Ontario, Fontana, Chino, Upland and Pomona.
What time zone is area code 909?
909 is in the Pacific (UTC−8) time zone, and observes daylight saving time.
What area codes overlay 909?
840 serves the same area as 909. Numbers in all of them are local to one another.
When did area code 909 start?
909 entered service on November 14, 1992, created from 714.
How do I find out who called me from 909?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Why am I getting calls from area code 909?
If you live in or near California, they may be genuinely local — or robocalls spoofing a local-looking number. Unknown 909 callers who will not leave a message are best looked up before you call back.