Thanks for this wonderful add-on.
A quickquestion if I may - what does a person from a blocked IP see? do they just get a "cannot display this page" type error or do they actually see the "Reason" if one is entered in admincp ?
Also, one suggestion for future versions - a feature enabling banning of a whole country using a two letter code (e.g PK)
I use a firewall (CSF) on our cpanel server which includes this feature, although it applies to all sites across the server which often isn't desireable.
Last but not least, I find this site really useful for finding CIDR ranges -
http://software77.net/geo-ip/ (I am not associated with the site in any way, I just use it).