- City / exchange
- Helena
- Province / state
- Montana
- Country
- United States
- Carrier
- 3 Rivers Telephone Cooperative, Inc. - Mt
- Line type
- Landline or business line
- OCN
- 3924
- Status
- In Service
- Assigned
- 07/01/2005
- Number pooling
- Yes (block shared between carriers)
406-440 phone numbers
Helena, Montana, United States · 3 Rivers Telephone Cooperative, Inc. - Mt
Reported numbers in 406-440
No numbers in this block have been reported by visitors yet.
What does the 406-440 prefix tell you?
Every North American number is area code + prefix + line. The prefix 406-440 was assigned to 3 Rivers Telephone Cooperative, Inc. - Mt on 07/01/2005 for the Helena exchange. A call from this block usually originates from a 3 Rivers Telephone Cooperative, Inc. - Mt customer in or near Helena, but caller ID can be spoofed to show any number.