====== DNS ======

  * [[Google DNS]]
  * [[Multicast DNS]]
  * [[OpenDNS]]
  * [[OpenNIC DNS]]
  * [[avahi]]
  * [[dig]]
  * [[djbdns]]
  * [[dnsip]] - look up the IP address of a domain name
  * [[dnsmasq]]
  * [[dnsmx]]
  * [[dnsname]] - look up the reverse DNS of an IP address
  * [[dnstxt]]
  * [[host]]
  * [[hosts_file]]
  * [[nslookup]]

  * [[http://www.dnswatch.info/|DNS Watch]] - DNS lookups
  * [[http://www.kitterman.com/spf/validate.html|SPF Query Tool]]

==== Public DNS Servers ====

Google:

  * 8.8.8.8
  * 8.8.4.4

Level3:

  * 4.4.4.4

OpenNIC:

  * 96.90.175.167
  * 50.116.23.211
  * 50.116.40.226
  * 104.238.153.178