Prefix overview
Phone numbers in prefix 203-437
This page covers the 203-437 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
203-437
RATE CENTER
WATERBURY
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
CT
Prefix range
The prefix 203-437 includes numbers from 2034370000 to 2034379999.
This range is associated with the WATERBURY rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC.
Numbers in this prefix
20 numbers