Prefix overview
Phone numbers in prefix 406-423
This page covers the 406-423 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
406-423
RATE CENTER
HOBSON
CARRIER
TRIANGLE TEL. COOP. ASSN., INC.
MT
Prefix range
The prefix 406-423 includes numbers from 4064230000 to 4064239999.
This range is associated with the HOBSON rate center and was originally assigned to TRIANGLE TEL. COOP. ASSN., INC..
Numbers in this prefix
20 numbers