Authoritative Answer or aa is a flag in the answer from a query to a DNS server. It can be seen in the dig DNS lookup utility output when a server gives an Authoritative Answer for the domain. The Domain Name System or DNS is a system that stores information about host names and domain names in a kind of distributed database on networks, such as the Internet. ... Dig can refer to: Dig! - a movie DiG - an internet radio station The Dig - a Lucasarts computer game Dig Dug - a 1980s arcade game Weekly Dig - a publication from Boston, USA The process of archaeological excavation dig - the Domain Information Groper, tool that relates to Internet Domain Name System Categories...

Authoritative Answer - this bit is valid in responses, and specifies that the responding name server is an authority for the domain name in question section. Note that the contents of the answer section may have multiple owner names because of aliases. The AA bit corresponds to the name which matches the query name, or the first owner name in the answer section. [1]