Prefix overview
Phone numbers in prefix 406-433
This page covers the 406-433 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
406-433
RATE CENTER
SIDNEY
CARRIER
MID-RIVERS TELEPHONE COOPERATIVE, INC.
MT
Prefix range
The prefix 406-433 includes numbers from 4064330000 to 4064339999.
This range is associated with the SIDNEY rate center and was originally assigned to MID-RIVERS TELEPHONE COOPERATIVE, INC..
Numbers in this prefix
20 numbers