Prefix overview
Phone numbers in prefix 231-438
This page covers the 231-438 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
231-438
RATE CENTER
HARBOR SPG
CARRIER
ONVOY, LLCV - MI
MI
Prefix range
The prefix 231-438 includes numbers from 2314380000 to 2314389999.
This range is associated with the HARBOR SPG rate center and was originally assigned to ONVOY, LLCV - MI.
Numbers in this prefix
20 numbers