Prefix overview
Phone numbers in prefix 857-299
This page covers the 857-299 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
857-299
RATE CENTER
BELMONT
CARRIER
ONVOY, LLC - MA
MA
Prefix range
The prefix 857-299 includes numbers from 8572990000 to 8572999999.
This range is associated with the BELMONT rate center and was originally assigned to ONVOY, LLC - MA.
Numbers in this prefix
20 numbers