What area code is Ontario, CA?
| City | Ontario, CA |
|---|---|
| State | California |
| Area codes | 909 and 840 |
| Time zone | Pacific Time |
| Phone prefixes | 132 in our data |
Look up a Ontario number
Ontario’s area codes
| Area code | Also covers |
|---|---|
| 909 | Ontario, San Bernardino, Rancho Cucamonga and Fontana |
| 840 | San Bernardino, Pomona, Lake Arrowhead and Fontana |
Other places in area code 909
- San Bernardino, CA
- Rancho Cucamonga, CA
- Fontana, CA
- Chino, CA
- Pomona, CA
- San Dimas, CA
- Colton, CA
- Redlands, CA
- Rialto, CA
- Walnut, CA
- Highland, CA
- Lake Arrowhead, CA
- Yucaipa, CA
- Riverside, CA
- Upland, CA
- Big Bear Lake, CA
- Big Bear, CA
- Crestline, CA
- Running Springs, CA
- Diamond Bar, CA
- La Verne, CA
- Loma Linda, CA
- Chino Hills, CA
- Corona, CA
Questions
- What is the area code for Ontario, California?
- Ontario uses 2 area codes: 909 and 840. 909 is the original or most common one, and newer numbers can be given 840.
- What time zone is Ontario in?
- Ontario is in Pacific Time.
- Do I need to dial the area code for a local call in Ontario?
- Yes. Because Ontario has more than one area code, local calls need all 10 digits: the area code plus the 7-digit number.
- How do I call Ontario from another country?
- Dial your country’s exit code (011 from most places, 00 from Europe), then 1, then the area code and number: +1 909 XXX XXXX.