Hi gdiloren,
It maps networks, and gives you an enormous amount of information, so give in a specific URL say 52.36.28.100 and it resolves:
* rbl (example: 52.36.28.100) checks multiple RBL:s. check if your mailserver is listed in any blacklist
* ipnumber (example: 52.36.28.100) checks ipnumber
* hostnames (example: ) checks dns-info for a specific hostname
* domainnames (example: ) checks dns-info for a domain
* whois lookup (example: ) checks whois-info for a domain
* c-net (example 52.36.28.100) checks reverse for a c-net
* route (example 52.36.28.100/XX checks a specific route
* as numbers (example: *****net))
* bgp announcements (example: ASXXXX)
* as macros (example: as-ams-ix-peers)
* rfcnumbers (example: rfc28XXX)
You have to allow NoScript on the page and give an enter to resolve, and run the online tool.
Investigate it is strong,
polonus