Prefix overview
Phone numbers in prefix 408-373
This page covers the 408-373 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
408-373
RATE CENTER
SUNNYVALE
CARRIER
T-MOBILE USA, INC.
CA
Prefix range
The prefix 408-373 includes numbers from 4083730000 to 4083739999.
This range is associated with the SUNNYVALE rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers