Prefix overview
Phone numbers in prefix 231-318
This page covers the 231-318 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
231-318
RATE CENTER
TRAVERSECY
CARRIER
SPOK, INC.
MI
Prefix range
The prefix 231-318 includes numbers from 2313180000 to 2313189999.
This range is associated with the TRAVERSECY rate center and was originally assigned to SPOK, INC..
Numbers in this prefix
20 numbers