Prefix overview
Phone numbers in prefix 603-304
This page covers the 603-304 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
603-304
RATE CENTER
ENFIELD
CARRIER
UNITED STATES CELLULAR - NH
NH
Prefix range
The prefix 603-304 includes numbers from 6033040000 to 6033049999.
This range is associated with the ENFIELD rate center and was originally assigned to UNITED STATES CELLULAR - NH.
Numbers in this prefix
20 numbers