Prefix overview
Phone numbers in prefix 956-423
This page covers the 956-423 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
956-423
RATE CENTER
HARLINGEN
CARRIER
SOUTHWESTERN BELL
TX
Prefix range
The prefix 956-423 includes numbers from 9564230000 to 9564239999.
This range is associated with the HARLINGEN rate center and was originally assigned to SOUTHWESTERN BELL.
Numbers in this prefix
20 numbers