Learn about DNS, the domain name system of the internet. Read about DNS servers, top-level domain extensions, and domain name registration.

Domain data on expiring domains and expired domains, including backward links and search engine rankings. Sign up to receive email alerts when expiring domains match your criteria. DomDat.com makes it easier to find expiring domains with backlinks and traffic.

TLDSearcher provides information about and rules for all available toplevel domains in the world today. We also supply WHOIS-search for many of them.