Prefix overview
Phone numbers in prefix 517-523
This page covers the 517-523 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
517-523
RATE CENTER
OSSEO
CARRIER
FRONTIER COMMUNICATIONS OF MICHIGAN, INC.
MI
Prefix range
The prefix 517-523 includes numbers from 5175230000 to 5175239999.
This range is associated with the OSSEO rate center and was originally assigned to FRONTIER COMMUNICATIONS OF MICHIGAN, INC..
Numbers in this prefix
20 numbers