Pick 909 if the number should read as Rancho Cucamonga.
909 was split from 714 and entered service on November 14, 1992.
The area codes for Rancho Cucamonga are 909 and 840.
Area codes in Rancho Cucamonga
Get a phone number with the right area code for Rancho Cucamonga.
Rancho Cucamonga uses 909 and 840, the two codes of the Ontario and Fontana area. 840 was laid over 909 on February 23, 2021.
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Rancho Cucamonga has two area codes.
- 909Since 1992Ontario, Fontana and PomonaRancho CucamongaChinoChino Hills
93 FCC complaints
Get a 909 number - 840Since 2021Overlay code
18 FCC complaints
Pick 909 for Rancho Cucamonga, the code the city has had since 1992.
Pick 909 to include Chino Hills and Diamond Bar.
Both are in the same area, so a number here does not look far away.
Pick 714 if the number is for Orange County to the southwest.
714 and 657 serve Anaheim and Garden Grove, and 909 was split from 714.
People filed 111 FCC complaints about unwanted calls from Rancho Cucamonga area codes in 12 months.
From October 2025 to September 2026, 111 unwanted-call complaints filed with the FCC gave a caller ID number that started with 909 and 840. 909 was named most, on 93 of them (84%).
- 111unwanted-call complaints named a Rancho Cucamonga code
- 909was named on the most of them, 93
- 84%of the Rancho Cucamonga complaints named 909
Rancho Cucamonga codes
How many complaints named a caller ID that starts with each Rancho Cucamonga code.
- 1909Ontario, Fontana and Pomona93
- 2840Overlay code18
Source: Federal Communications Commission, CGB - Consumer Complaints Data (dataset 3xyp-aqkj), issue "Unwanted Calls", read on November 4, 2026. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
This is how you get a Rancho Cucamonga number.
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People ask these questions about Rancho Cucamonga area codes.
More in the full FAQ.
No. Riverside uses 951. Rancho Cucamonga stayed in 909 when the area was divided in 2004.
No. 840 covers the same area as 909, and it entered service on February 23, 2021.
A local call in Rancho Cucamonga is dialed with 1 plus ten digits, whichever of its codes the number starts with. The area code is part of every number you give out.
From October 2025 to September 2026, people filed 111 FCC complaints about unwanted calls from numbers that start with a Rancho Cucamonga code: 909 (93) and 840 (18). A complaint is one person's report. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
Yes. You type the area code you want when you create a number, and you do not need to live in Rancho Cucamonga. Calls ring the phone you already have, and texts land in your ExpressNumber inbox.
No. Your numbers are receive-only: they take calls and texts, and they never make them. You answer calls on your own phone, and you cannot reply to a text from the inbox.
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Codes around Rancho Cucamonga
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Every fact on this page comes from public numbering records.
The codes, the places and the years are rows of the North American Numbering Plan Administrator's area code database, and the complaints are the FCC's own.
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