Required:
Net::DNS
Term::ANSIColor
(not included)

Using:

./rbllookup.pl

Checking by IP:

./rbllookup.pl ip

Checking by host:

./rbllookup.pl hostname

Checking with verbose

./rbllookup.pl ip/hostname -v

Suggested using for most users:

./rbllookup.pl ip/hostname -v | grep LISTED