Prefix overview
Phone numbers in prefix 406-303
This page covers the 406-303 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
406-303
RATE CENTER
MISSOULA
CARRIER
TELEPORT COMMUNICATIONS AMERICA MT - LLC
MT
Prefix range
The prefix 406-303 includes numbers from 4063030000 to 4063039999.
This range is associated with the MISSOULA rate center and was originally assigned to TELEPORT COMMUNICATIONS AMERICA MT - LLC.
Numbers in this prefix
20 numbers