909 area code — Ontario, CA geographic
- State
- California
- Major area
- Ontario
- Time zone
- Pacific
- In service since
- 1992-11-14
- Split from
- 714
- Overlay complex
- 840 / 909
- Active prefixes
- 786
- Rate centers
- 25
- Carriers
- 38
- Projected exhaust
- 1Q 2056
Phone numbers beginning 909 are registered to the Ontario area of California (Pacific time zone). The code entered service on November 14, 1992. It is part of the 840/909 overlay complex — these codes share the same territory. Note that porting and VoIP mean a 909 number can be used from anywhere — the code marks where the number was assigned.
786 central-office prefixes are currently active in this code, spread across 38 code-holding carriers. Thousands-block pooling applies to 560 prefixes, so a single prefix can belong to several carriers. Its prefixes map to 25 distinct rate centers.
If a 909 call asks for money or personal data, treat the displayed number as unverified: hang up and reach the organization through its published number. Numbering data locates numbers, not callers.
909 was created from 714 in 1992. It has since spawned 951 (2004), 840 (2021).
NANPA projects numbering capacity for the 840/909 complex to exhaust in 1Q 2056.
Dialing: 1+10D locally, 1+10D to other codes.
Largest localities in 909
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Ontario | 124 | 840 |
| San Bernardino | 88 | 840 |
| Fontana | 70 | 840 |
| Upland | 70 | 840 |
| Chino | 55 | 840 |
| Pomona | 51 | 840 |
| Claremont | 50 | 840 |
| Colton | 45 | 840, 951 |
| Redlands | 38 | 840 |
| Rialto | 34 | 840 |
FAQ
Why am I getting spam calls from 909 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 909 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 909 number from?
909 is assigned to Ontario and surrounding areas of California in the Pacific time zone. The three digits after the area code (the prefix) narrow it down to a rate center.
Is 909 a toll-free number?
No. 909 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Why do 840 and 909 cover the same place?
They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 840/909 complex shares one service area, and local calls are dialed with 10 digits.