http://www.tldp.org/HOWTO/DNS-HOWTO.html#toc1 The Linux Documentation Project. This is an in-depth DNS HOWTO with DNS general information as well.
http://www.isc.org/index.pl?/sw/bind/ Internet Systems Consortium, Inc. (ISC) is a nonprofit public benefit corporation dedicated to supporting the infrastructure of the universal connected self-organizing Internet. This is an in-depth DNS/BIND HOWTO with DNS/BIND general information as well.
http://www.arin.net American Registry for Internet Numbers. A nonprofit registry responsible for the administration and registration of Internet Protocol (IP) numbers in North and South America, South Africa, the Caribbean, and all other regions administered currently managed by Network Solutions, Inc.
http://www.isc.org/bind.html Berkeley Internet Name Domain information direct. BIND software, developed by the University of California at Berkeley, implements a DNS server and a resolver library that enables clients to store and retrieve resources or objects and share this information with other resources on the network. This link covers BIND in detail.
http://www.iana.org/ Internet Assigned Numbers Authority. IANA is a government-funded authority that assigns and distributes international domain names and IP numbers or Internet addresses and oversees the Internet software protocols of the officially sanctioned root servers.
http://www.internic.net/ A registry responsible for name assignment within the following TLDs: COM, EDU, NET, GOV, and ORG.