Prefix overview
Phone numbers in prefix 557-231
This page covers the 557-231 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
557-231
RATE CENTER
ST LOUIS
CARRIER
TELEPORT COMMUNICATIONS AMERICA, LLC - MO
MO
Prefix range
The prefix 557-231 includes numbers from 5572310000 to 5572319999.
This range is associated with the ST LOUIS rate center and was originally assigned to TELEPORT COMMUNICATIONS AMERICA, LLC - MO.
Numbers in this prefix
20 numbers