Prefix overview
Phone numbers in prefix 603-421
This page covers the 603-421 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
603-421
RATE CENTER
DERRY
CARRIER
CONSOLIDATED COMM OF NO. NEW ENGLAND-NH
NH
Prefix range
The prefix 603-421 includes numbers from 6034210000 to 6034219999.
This range is associated with the DERRY rate center and was originally assigned to CONSOLIDATED COMM OF NO. NEW ENGLAND-NH.
Numbers in this prefix
20 numbers