Prefix overview
Phone numbers in prefix 303-390
This page covers the 303-390 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
303-390
RATE CENTER
DENVER
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
CO
Prefix range
The prefix 303-390 includes numbers from 3033900000 to 3033909999.
This range is associated with the DENVER rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC.
Numbers in this prefix
20 numbers