AAAA is a domain address record, that is basically the IPv6 address of the web server in which the domain name is hosted. The IPv6 system was designed to replace the existing IPv4 system in which each and every IP consists of four groups of decimal numbers which range from 1 to 255 e.g. 22.214.171.124. In comparison, an IPv6 address includes eight groups of four hexadecimal numbers - ranging from 0 to 9 and from A to F. The main reason for this modification is the tremendously smaller selection of unique IPs the present system supports and the speedy increase of gadgets which are connected to the world wide web. An illustration of an IPv6 address would be 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you want to direct a domain address to a machine which uses this kind of an address, you will need to set up an AAAA record for it, not the commonly used A record, that is an IPv4 address. Both records have the exact same function, yet different notations are used, so as to distinguish the two types of addresses.