Prefix overview
Phone numbers in prefix 406-225
This page covers the 406-225 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
406-225
RATE CENTER
BOULDER
CARRIER
QWEST CORPORATION
MT
Prefix range
The prefix 406-225 includes numbers from 4062250000 to 4062259999.
This range is associated with the BOULDER rate center and was originally assigned to QWEST CORPORATION.
Numbers in this prefix
20 numbers