Ontario, OR Area Codes
Ontario, Oregon (population 11,957) uses area codes 541 and 458.
Carriers with Ontario numbers
12 prefixes are assigned to the Ontario exchange: 33% mobile, 17% VoIP and cable, 50% landline.
| Carrier | Prefixes |
|---|---|
| Lumen (Qwest) | 3 |
| Farmers Mutual Telephone Company | 2 |
| Verizon Wireless | 2 |
| Onvoy (Sinch) | 2 |
| T-Mobile | 1 |
| UScellular | 1 |
| Skyetel | 1 |
Area codes used in Ontario
| Area code | Prefixes serving Ontario | Main carriers in this code |
|---|---|---|
| 541 | 7 | Lumen (Qwest), Lumen (CenturyLink), Onvoy (Sinch) |
| 458 | 5 | Onvoy (Sinch), Ton80 Communications, T-Mobile |
Ontario phone number prefixes
Numbers starting with these first six digits were originally assigned to the Ontario exchange.
541-212T-Mobile541-216UScellular541-235Farmers Mutual Telephone Company541-709Verizon Wireless541-823Lumen (Qwest)541-881Lumen (Qwest)541-889Lumen (Qwest)458-224Verizon Wireless458-251Onvoy (Sinch)458-276Skyetel458-289Farmers Mutual Telephone Company458-446Onvoy (Sinch)
Nearby cities in area code 541
Questions
- What is the area code for Ontario, OR?
- Ontario uses 2 area codes: 541 and 458. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Ontario in?
- Ontario is in the Mountain time zone (area code 541 also reaches into the Pacific time zone).