AAAA is a domain record, which is in essence the IPv6 address of the web server where the domain name is hosted. The IPv6 system was introduced to replace the current IPv4 system in which each Internet protocol address is comprised of 4 sets of decimal numbers between 1 to 255 e.g. 18.104.22.168. In comparison, an IPv6 address features eight sets of four hexadecimal numbers - which range from 0 to 9 and from A to F. The reason behind this transformation is the considerably smaller selection of unique IPs the present system supports and also the quick increase of devices which are connected to the Internet. An illustration of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you wish to forward a domain to a server which uses such an address, you have to create an AAAA record for it, not the widely used A record, which is an IPv4 address. Both records deliver the exact same function, yet different notations are used, in order to distinguish the two sorts of addresses.