Prefix overview
Phone numbers in prefix 857-394
This page covers the 857-394 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
857-394
RATE CENTER
BELMONT
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
MA
Prefix range
The prefix 857-394 includes numbers from 8573940000 to 8573949999.
This range is associated with the BELMONT rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC.
Numbers in this prefix
20 numbers