====== network host tools ======

whois

  - http://www.whoismind.com/whois/domainname.com.html

Reverse ip lookup

  - http://www.domaintools.com/reverse-ip/
  - http://www.myipneighbors.com/
  - http://www.yougetsignal.com/tools/web-sites-on-web-server/
  - http://whois.webhosting.info/