I have written an AJAX based RBL checker tool as an extension to this site, in the hope that it is useful.

You can access it at http://www.nickpack.com/tools/rblcheck

Simply enter any IPv4 address into it and it will search a pre-defined list of RBL's for you, and will return details if their are any.

 

I am looking for suggestions for additional RBL lists to add to it, so please comment here if you need one that isnt there already..

Any feedback would be appreciated also.