Prefix overview
Phone numbers in prefix 623-666
This page covers the 623-666 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
623-666
RATE CENTER
PHOENIX
CARRIER
ONVOY, LLC - AZ
AZ
Prefix range
The prefix 623-666 includes numbers from 6236660000 to 6236669999.
This range is associated with the PHOENIX rate center and was originally assigned to ONVOY, LLC - AZ.
Numbers in this prefix
20 numbers