This is a simple perl script that will scan a given IP range and extract the Common Name from all SSL certificates. It is useful for discovery during penetration tests.
You can download it from the following link: https://packetstormsecurity.com/files/download/120634/ssl_hostname_resolver.pl.txt
Source: https://packetstormsecurity.com/files/120634/Common-Name-Grabber-Script.html