Prefix overview
Phone numbers in prefix 442-378
This page covers the 442-378 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
442-378
RATE CENTER
FALLBROOK
CARRIER
T-MOBILE USA, INC.
CA
Prefix range
The prefix 442-378 includes numbers from 4423780000 to 4423789999.
This range is associated with the FALLBROOK rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers