Prefix overview
Phone numbers in prefix 256-420
This page covers the 256-420 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
256-420
RATE CENTER
ARDMORE
CARRIER
ARDMORE TEL. CO., INC.
AL
Prefix range
The prefix 256-420 includes numbers from 2564200000 to 2564209999.
This range is associated with the ARDMORE rate center and was originally assigned to ARDMORE TEL. CO., INC..
Numbers in this prefix
20 numbers