Prefix overview
Phone numbers in prefix 857-378
This page covers the 857-378 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
857-378
RATE CENTER
BOSTON
CARRIER
VERIZON NEW ENGLAND INC.
MA
Prefix range
The prefix 857-378 includes numbers from 8573780000 to 8573789999.
This range is associated with the BOSTON rate center and was originally assigned to VERIZON NEW ENGLAND INC..
Numbers in this prefix
20 numbers