Prefix overview
Phone numbers in prefix 857-300
This page covers the 857-300 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
857-300
RATE CENTER
BOSTON
CARRIER
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA
MA
Prefix range
The prefix 857-300 includes numbers from 8573000000 to 8573009999.
This range is associated with the BOSTON rate center and was originally assigned to CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA.
Numbers in this prefix
20 numbers