Prefix overview
Phone numbers in prefix 203-370
This page covers the 203-370 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
203-370
RATE CENTER
NEW HAVEN
CARRIER
AMERICAN MESSAGING SERVICES, LLC
CT
Prefix range
The prefix 203-370 includes numbers from 2033700000 to 2033709999.
This range is associated with the NEW HAVEN rate center and was originally assigned to AMERICAN MESSAGING SERVICES, LLC.
Numbers in this prefix
20 numbers