Prefix overview
Phone numbers in prefix 203-404
This page covers the 203-404 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
203-404
RATE CENTER
NEW HAVEN
CARRIER
LEVEL 3 COMMUNICATIONS, LLC - CT
CT
Prefix range
The prefix 203-404 includes numbers from 2034040000 to 2034049999.
This range is associated with the NEW HAVEN rate center and was originally assigned to LEVEL 3 COMMUNICATIONS, LLC - CT.
Numbers in this prefix
20 numbers