Prefix overview
Phone numbers in prefix 557-507
This page covers the 557-507 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
557-507
RATE CENTER
ST LOUIS
CARRIER
ONVOY SPECTRUM, LLC
MO
Prefix range
The prefix 557-507 includes numbers from 5575070000 to 5575079999.
This range is associated with the ST LOUIS rate center and was originally assigned to ONVOY SPECTRUM, LLC.
Numbers in this prefix
20 numbers