| District of California area codes: 909 | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | Riverside |
| Time Zone | Pacific |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 909-540 | Riverside | Riverside, CA | 33 Wireless Inc. |
| 909-542 | Los Angeles | Claremont, CA | Mpower Communications Corp |
| 909-543 | San Bernardino | Rialto, CA | Level 3 Communications |
| 909-544 | San Bernardino | Ontario, CA | Cellco Partnership DBA Verizon Wireless |
| 909-545 | San Bernardino | Ontario, CA | Metropcs Networks |
| 909-546 | San Bernardino | Rialto, CA | Allegiance Telecom |
| 909-547 | San Bernardino | Big Bear City, CA | Tw Telecom Of California Lp |
| 909-548 | San Bernardino | Chino, CA | Verizon California Inc.-ca (gte) |
| 909-549 | San Bernardino | Fontana, CA | Cellco Partnership DBA Verizon Wireless |
| 909-553 | San Bernardino | San Bernardino, CA | New Cingular Wireless PCS |
| 909-554 | San Bernardino | Colton, CA | Pacific Bell |
| 909-556 | San Bernardino | San Bernardino, CA | New Cingular Wireless PCS |
| 909-557 | San Bernardino | Redlands, CA | AT&T Local |
| 909-558 | San Bernardino | Redlands, CA | Verizon California Inc.-ca (gte) |
| 909-559 | San Bernardino | Fontana, CA | Sprint Spectrum L.p. |
| 909-560 | San Bernardino | Upland, CA | New Cingular Wireless PCS |
| 909-561 | San Bernardino | Fontana, CA | Sprint Spectrum L.p. |
| 909-562 | San Bernardino | Rialto, CA | Pacific Bell |
| 909-563 | San Bernardino | Ontario, CA | Pac - West Telecomm |
| 909-564 | San Bernardino | Ontario, CA | American Messaging Services |
There are 627 prefixes, In the code area, the major cities are Chino, CA;Chino Hills, CA;Claremont, CA;Colton, CA. The major city is Riverside.