Prefix overview
Phone numbers in prefix 956-403
This page covers the 956-403 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
956-403
RATE CENTER
PHARR
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
TX
Prefix range
The prefix 956-403 includes numbers from 9564030000 to 9564039999.
This range is associated with the PHARR rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC.
Numbers in this prefix
20 numbers