Prefix overview
Phone numbers in prefix 231-278
This page covers the 231-278 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
231-278
RATE CENTER
HESPERIA
CARRIER
ONVOY SPECTRUM, LLC
MI
Prefix range
The prefix 231-278 includes numbers from 2312780000 to 2312789999.
This range is associated with the HESPERIA rate center and was originally assigned to ONVOY SPECTRUM, LLC.
Numbers in this prefix
20 numbers