Prefix overview
Phone numbers in prefix 475-257
This page covers the 475-257 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
475-257
RATE CENTER
NORWALK
CARRIER
CSC WIRELESS, LLC
CT
Prefix range
The prefix 475-257 includes numbers from 4752570000 to 4752579999.
This range is associated with the NORWALK rate center and was originally assigned to CSC WIRELESS, LLC.
Numbers in this prefix
20 numbers