Prefix overview
Phone numbers in prefix 313-203
This page covers the 313-203 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
313-203
RATE CENTER
DETROITZN6
CARRIER
TELEPORT COMMUNICATIONS AMERICA, LLC - MI
MI
Prefix range
The prefix 313-203 includes numbers from 3132030000 to 3132039999.
This range is associated with the DETROITZN6 rate center and was originally assigned to TELEPORT COMMUNICATIONS AMERICA, LLC - MI.
Numbers in this prefix
20 numbers