Prefix overview
Phone numbers in prefix 406-422
This page covers the 406-422 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
406-422
RATE CENTER
HELENA
CARRIER
CHARTER IP ENABLED SERVICES, LLC
MT
Prefix range
The prefix 406-422 includes numbers from 4064220000 to 4064229999.
This range is associated with the HELENA rate center and was originally assigned to CHARTER IP ENABLED SERVICES, LLC.
Numbers in this prefix
20 numbers