.MSN File Extension
File TypeHost Blocking File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an MSN file?
Contains a list of blocked Internet hosts, often identified by IP addresses; prevents certain websites and other Internet locations from being accessed.
The default host blocking file is typically named "hosts.msn" and is located in the "C:\WINDOWS\system32\drivers\etc" directory.