Prefix overview
Phone numbers in prefix 231-238
This page covers the 231-238 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
231-238
RATE CENTER
INDIAN RIV
CARRIER
MICHIGAN BELL TEL CO
MI
Prefix range
The prefix 231-238 includes numbers from 2312380000 to 2312389999.
This range is associated with the INDIAN RIV rate center and was originally assigned to MICHIGAN BELL TEL CO.
Numbers in this prefix
20 numbers