Prefix overview
Phone numbers in prefix 603-309
This page covers the 603-309 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
603-309
RATE CENTER
NEWPORT
CARRIER
BELL ATLANTIC MOBILE, INC
NH
Prefix range
The prefix 603-309 includes numbers from 6033090000 to 6033099999.
This range is associated with the NEWPORT rate center and was originally assigned to BELL ATLANTIC MOBILE, INC.
Numbers in this prefix
20 numbers