Prefix overview
Phone numbers in prefix 657-478
This page covers the 657-478 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
657-478
RATE CENTER
BREA
CARRIER
NEW CINGULAR WIRELESS PCS, LLC
CA
Prefix range
The prefix 657-478 includes numbers from 6574780000 to 6574789999.
This range is associated with the BREA rate center and was originally assigned to NEW CINGULAR WIRELESS PCS, LLC.
Numbers in this prefix
20 numbers