Find out about a domain, including who owns it and their contact information, what server software it runs, usage ranking among many other useful information bits

Get detailed information about an Internet host. Enter an IP address (64.233.167.99), domain name (google.com), hostname (py-in-f99.google.com), or AS-number (AS15169) to get detailed dns information including reverse dns and forwards, whois information, who hosts the machine, and if it's listed in any RBLs (black lists).

Query DNS domain name servers for information about host addresses, mail exchanges, name servers, and related information

Check any Internet host's reachability and how much latency there is in communicating with it from 50 locations worldwide