Prefix overview
Phone numbers in prefix 408-399
This page covers the 408-399 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
408-399
RATE CENTER
LOS GATOS
CARRIER
FRONTIER CALIFORNIA INC.
CA
Prefix range
The prefix 408-399 includes numbers from 4083990000 to 4083999999.
This range is associated with the LOS GATOS rate center and was originally assigned to FRONTIER CALIFORNIA INC..
Numbers in this prefix
20 numbers