Prefix overview
Phone numbers in prefix 231-508
This page covers the 231-508 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
231-508
RATE CENTER
ONEKAMA
CARRIER
KALEVA TELEPHONE COMPANY - MI
MI
Prefix range
The prefix 231-508 includes numbers from 2315080000 to 2315089999.
This range is associated with the ONEKAMA rate center and was originally assigned to KALEVA TELEPHONE COMPANY - MI.
Numbers in this prefix
20 numbers