Prefix overview
Phone numbers in prefix 628-257
This page covers the 628-257 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
628-257
RATE CENTER
MILLVALLEY
CARRIER
RACE TELECOMMUNICATIONS, INC. - CA
CA
Prefix range
The prefix 628-257 includes numbers from 6282570000 to 6282579999.
This range is associated with the MILLVALLEY rate center and was originally assigned to RACE TELECOMMUNICATIONS, INC. - CA.
Numbers in this prefix
20 numbers