Enter any domain name that you would like to perform an Abuse Contact Lookup on. (i.e. justmyip.org or w3dt.net)
W3dt.net's Abuse Contact Lookup database is a tool that can be used to perform a lookup on a domain to obtain the abuse contact information of the domain owner(s).
If you want to report abusive behavior about a domain, you need to report it to the system where the abuse originated. The w3dt.net's 'Abuse Contact Lookup' database helps find the rightful contact information about a domain, so that you can send messages about abusive activity on the Internet to the owners of the domain who can do something about it. The w3dt.net Abuse Contact Lookup database is not a blacklist, nor is it a spam analysis service. It just helps users find the rightful contact information for the system managers of a domain.
W3dt.net also suggests that you take a look at http://www.abuse.net/ if you are having spam issues, as w3dt.net is a system administrator website, and not a spam filtering service.
The w3dt domain abuse lookup tool is based off abuse.net's systems (2013).