Prefix overview
Phone numbers in prefix 956-257
This page covers the 956-257 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
956-257
RATE CENTER
RIGRANDECY
CARRIER
NEW CINGULAR WIRELESS PCS, LLC - IL
TX
Prefix range
The prefix 956-257 includes numbers from 9562570000 to 9562579999.
This range is associated with the RIGRANDECY rate center and was originally assigned to NEW CINGULAR WIRELESS PCS, LLC - IL.
Numbers in this prefix
20 numbers