Webmaster Tools

Archive Wayback Machine

Domain history is revealed by the Archive Wayback Machine. Type in a domain address and if it previously had an active web site on it, the Wayback machine will let you see those old web pages! Data comes from Alexa who has archived billions of web pages dating back many years.

https://archive.org/
Network Tools

offers network tools for webmasters & IT geeks, including ping, traceroute, WHOIS (inc IDNs), DNS check, NSlookup, spam blacklist check, URL encode and decode, and header checks.

http://network-tools.com/