Prefix overview
Phone numbers in prefix 603-456
This page covers the 603-456 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
603-456
RATE CENTER
WARNER
CARRIER
MERRIMACK COUNTY TEL. CO.
NH
Prefix range
The prefix 603-456 includes numbers from 6034560000 to 6034569999.
This range is associated with the WARNER rate center and was originally assigned to MERRIMACK COUNTY TEL. CO..
Numbers in this prefix
20 numbers