Prefix overview
Phone numbers in prefix 720-428
This page covers the 720-428 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
720-428
RATE CENTER
DENVER
CARRIER
ONVOY, LLC - CO
CO
Prefix range
The prefix 720-428 includes numbers from 7204280000 to 7204289999.
This range is associated with the DENVER rate center and was originally assigned to ONVOY, LLC - CO.
Numbers in this prefix
20 numbers