Prefix overview
Phone numbers in prefix 203-350
This page covers the 203-350 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
203-350
RATE CENTER
MADISON
CARRIER
TELEPORT COMMUNICATIONS AMERICA, LLC - CT
CT
Prefix range
The prefix 203-350 includes numbers from 2033500000 to 2033509999.
This range is associated with the MADISON rate center and was originally assigned to TELEPORT COMMUNICATIONS AMERICA, LLC - CT.
Numbers in this prefix
20 numbers