- City / exchange
- Colton
- Province / state
- California
- Country
- United States
- Carrier
- T-mobile Usa, Inc.
- Line type
- Likely mobile
- OCN
- 6529
- Status
- In Service
- Assigned
- 03/28/2024
- Number pooling
- Yes (block shared between carriers)
840-257 phone numbers
Colton, California, United States · T-mobile Usa, Inc.
Reported numbers in 840-257
No numbers in this block have been reported by visitors yet.
What does the 840-257 prefix tell you?
Every North American number is area code + prefix + line. The prefix 840-257 was assigned to T-mobile Usa, Inc. on 03/28/2024 for the Colton exchange. A call from this block usually originates from a T-mobile Usa, Inc. customer in or near Colton, but caller ID can be spoofed to show any number.