Prefix overview
Phone numbers in prefix 810-257
This page covers the 810-257 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
810-257
RATE CENTER
FLINT
CARRIER
MICHIGAN BELL TEL CO
MI
Prefix range
The prefix 810-257 includes numbers from 8102570000 to 8102579999.
This range is associated with the FLINT rate center and was originally assigned to MICHIGAN BELL TEL CO.
Numbers in this prefix
20 numbers