Prefix overview
Phone numbers in prefix 603-378
This page covers the 603-378 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
603-378
RATE CENTER
PLAISTOW
CARRIER
CONSOLIDATED COMM OF NO. NEW ENGLAND-NH
NH
Prefix range
The prefix 603-378 includes numbers from 6033780000 to 6033789999.
This range is associated with the PLAISTOW rate center and was originally assigned to CONSOLIDATED COMM OF NO. NEW ENGLAND-NH.
Numbers in this prefix
20 numbers