Prefix overview
Phone numbers in prefix 406-400
This page covers the 406-400 prefix in the United States. It shows where numbers come from, which carrier is linked to the range, and how this block is structured.
If you are looking for a specific number, you can continue to its dedicated phone page. Otherwise, this page helps you understand the broader number block behind it.
PREFIX
406-400
RATE CENTER
HAVRE
CARRIER
TRIANGLE COMMUNICATION SYSTEM, INC. - MT-
MT
Prefix range
The prefix 406-400 includes numbers from 4064000000 to 4064009999.
This range is associated with the HAVRE rate center and was originally assigned to TRIANGLE COMMUNICATION SYSTEM, INC. - MT-.
Numbers in this prefix
20 numbers