Prefix overview
Phone numbers in prefix 408-403
This page covers the 408-403 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
408-403
RATE CENTER
SNJS SOUTH
CARRIER
ONVOY, LLC - CA
CA
Prefix range
The prefix 408-403 includes numbers from 4084030000 to 4084039999.
This range is associated with the SNJS SOUTH rate center and was originally assigned to ONVOY, LLC - CA.
Numbers in this prefix
20 numbers