The ability to contact sites is an important step in responding to computer security incidents. It al-lows you to exchange information about security incidents, better understand intruder activity, be-come aware of potential vulnerabilities, and improve security at your site. Contacting a site may also help them become aware of a previously unknown security incident and respond appropri-ately. Ultimately, contacting sites to discuss security incidents helps to improve computer security for the entire Internet community.
This tech tip describes contact methods, converting between domain names and IP numbers, finding contact information based on domain names, and finding contact information based on IP numbers.