Prefix overview
Phone numbers in prefix 203-303
This page covers the 203-303 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
203-303
RATE CENTER
WALLINGFD
CARRIER
TELEPORT COMMUNICATIONS AMERICA, LLC - CT
CT
Prefix range
The prefix 203-303 includes numbers from 2033030000 to 2033039999.
This range is associated with the WALLINGFD rate center and was originally assigned to TELEPORT COMMUNICATIONS AMERICA, LLC - CT.
Numbers in this prefix
20 numbers