Prefix overview
Phone numbers in prefix 603-390
This page covers the 603-390 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
603-390
RATE CENTER
JEFFERSON
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH
NH
Prefix range
The prefix 603-390 includes numbers from 6033900000 to 6033909999.
This range is associated with the JEFFERSON rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH.
Numbers in this prefix
20 numbers