Prefix overview
Phone numbers in prefix 256-433
This page covers the 256-433 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
256-433
RATE CENTER
HUNTSVILLE
CARRIER
SPOK, INC.
AL
Prefix range
The prefix 256-433 includes numbers from 2564330000 to 2564339999.
This range is associated with the HUNTSVILLE rate center and was originally assigned to SPOK, INC..
Numbers in this prefix
20 numbers