Prefix overview
Phone numbers in prefix 603-345
This page covers the 603-345 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
603-345
RATE CENTER
MERRIMACK
CARRIER
UNITED STATES CELLULAR - NH
NH
Prefix range
The prefix 603-345 includes numbers from 6033450000 to 6033459999.
This range is associated with the MERRIMACK rate center and was originally assigned to UNITED STATES CELLULAR - NH.
Numbers in this prefix
20 numbers