Prefix overview
Phone numbers in prefix 231-518
This page covers the 231-518 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
231-518
RATE CENTER
KALKASKA
CARRIER
LEVEL 3 COMMUNICATIONS, LLC - MI
MI
Prefix range
The prefix 231-518 includes numbers from 2315180000 to 2315189999.
This range is associated with the KALKASKA rate center and was originally assigned to LEVEL 3 COMMUNICATIONS, LLC - MI.
Numbers in this prefix
20 numbers