Phone Prefix
(406) 378-XXXX
MT • BIG SANDY
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Carrier Information
NANPA
State
MT
Region
WE
Rate Center
BIG SANDY
Assigned To
TRIANGLE TEL. COOP. ASSN., INC.
OCN
2257
Status
RT
Number Range
First Number
(406) 378-0000
Last Number
(406) 378-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
2 reports
2
Total FCC + FTC DNC complaints for numbers in this prefix
Top 2 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (406) 378-2134 4063782134 | 1 |
| 2 | (406) 378-2867 4063782867 | 1 |
About This Prefix
Phone numbers starting with (406) 378 are part of the North American Numbering Plan (NANP). The first three digits (406) represent the Area Code (NPA), and the next three digits (378) represent the Central Office Code (NXX) or exchange.
- NPA (406) - Numbering Plan Area, identifies the geographic region
- NXX (378) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)