Prefix overview
Phone numbers in prefix 603-380
This page covers the 603-380 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
603-380
RATE CENTER
PORTSMOUTH
CARRIER
NEW CINGULAR WIRELESS PCS, LLC - DC
NH
Prefix range
The prefix 603-380 includes numbers from 6033800000 to 6033809999.
This range is associated with the PORTSMOUTH rate center and was originally assigned to NEW CINGULAR WIRELESS PCS, LLC - DC.
Numbers in this prefix
20 numbers