Prefix overview
Phone numbers in prefix 203-306
This page covers the 203-306 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
203-306
RATE CENTER
MILFORD
CARRIER
PAETEC ITEL, LLC
CT
Prefix range
The prefix 203-306 includes numbers from 2033060000 to 2033069999.
This range is associated with the MILFORD rate center and was originally assigned to PAETEC ITEL, LLC.
Numbers in this prefix
20 numbers