Prefix overview
Phone numbers in prefix 231-377
This page covers the 231-377 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
231-377
RATE CENTER
CLAM RIVER
CARRIER
FRONTIER NORTH, INC. - MI
MI
Prefix range
The prefix 231-377 includes numbers from 2313770000 to 2313779999.
This range is associated with the CLAM RIVER rate center and was originally assigned to FRONTIER NORTH, INC. - MI.
Numbers in this prefix
20 numbers