Prefix overview
Phone numbers in prefix 603-257
This page covers the 603-257 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
603-257
RATE CENTER
PLAISTOW
CARRIER
FREEDOM RING COMMUNICATIONS, LLC
NH
Prefix range
The prefix 603-257 includes numbers from 6032570000 to 6032579999.
This range is associated with the PLAISTOW rate center and was originally assigned to FREEDOM RING COMMUNICATIONS, LLC.
Numbers in this prefix
20 numbers