Prefix overview
Phone numbers in prefix 831-231
This page covers the 831-231 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
831-231
RATE CENTER
GREENFIELD
CARRIER
ONVOY SPECTRUM, LLC
CA
Prefix range
The prefix 831-231 includes numbers from 8312310000 to 8312319999.
This range is associated with the GREENFIELD rate center and was originally assigned to ONVOY SPECTRUM, LLC.
Numbers in this prefix
20 numbers