(840) 257
Prefix in COLTON, California
Prefix Details
| Area Code | 840 |
| Prefix | 257 |
| Full Number Pattern | (840) 257-XXXX |
| Rate Center | COLTON |
| State | California |
| Operating Company | T-MOBILE USA, INC. |
| Time Zone | Pacific (PT, UTC-8) |
About the (840) 257 Prefix
The (840) 257 prefix is assigned to T-MOBILE USA, INC. and serves the COLTON rate center in California. Phone numbers with this prefix are in the Pacific Time Zone and are part of area code 840 which covers San Bernardino and surrounding areas.