Prefix overview
Phone numbers in prefix 310-397
This page covers the 310-397 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
310-397
RATE CENTER
SNMN MRVS
CARRIER
FRONTIER CALIFORNIA INC.
CA
Prefix range
The prefix 310-397 includes numbers from 3103970000 to 3103979999.
This range is associated with the SNMN MRVS rate center and was originally assigned to FRONTIER CALIFORNIA INC..
Numbers in this prefix
20 numbers