Prefix overview
Phone numbers in prefix 256-421
This page covers the 256-421 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
256-421
RATE CENTER
GRANT
CARRIER
CHARTER IP ENABLED SERVICES, LLC
AL
Prefix range
The prefix 256-421 includes numbers from 2564210000 to 2564219999.
This range is associated with the GRANT rate center and was originally assigned to CHARTER IP ENABLED SERVICES, LLC.
Numbers in this prefix
20 numbers