Prefix overview
Phone numbers in prefix 840-278
This page covers the 840-278 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
840-278
RATE CENTER
ARROWHEAD
CARRIER
T-MOBILE USA, INC.
CA
Prefix range
The prefix 840-278 includes numbers from 8402780000 to 8402789999.
This range is associated with the ARROWHEAD rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers