AAAA is a domain name record, that's essentially the IPv6 address of the server where the domain name is hosted. The IPv6 system was designed to replace the existing IPv4 system where every IP comprises of four sets of decimal numbers ranging from 1 to 255 e.g. 5.168.208.143. In contrast, an IPv6 address has eight sets of four hexadecimal numbers - which range from 0 to 9 and from A to F. The main reason for this modification is the considerably smaller number of unique IPs that the present system supports as well as the speedy increase of units 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 wish to forward a domain to a web server which uses this sort of an address, you will have to create an AAAA record for it, and not the widely used A record, that is an IPv4 address. The 2 records provide the very same function, yet different notations are used, in order to distinguish the two forms of addresses.