Prefix overview
Phone numbers in prefix 303-448
This page covers the 303-448 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
303-448
RATE CENTER
DENVER
CARRIER
QWEST CORPORATION
CO
Prefix range
The prefix 303-448 includes numbers from 3034480000 to 3034489999.
This range is associated with the DENVER rate center and was originally assigned to QWEST CORPORATION.
Numbers in this prefix
20 numbers