Prefix overview
Phone numbers in prefix 443-433
This page covers the 443-433 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
443-433
RATE CENTER
ANNAPOLIS
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
MD
Prefix range
The prefix 443-433 includes numbers from 4434330000 to 4434339999.
This range is associated with the ANNAPOLIS rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC.
Numbers in this prefix
20 numbers