AAAA is a domain name record, which is essentially the IPv6 address of the server where the domain is hosted. The IPv6 system was designed to replace the present IPv4 system in which each Internet protocol address comprises of four groups of decimal numbers between 1 to 255 e.g. 126.96.36.199. In contrast, an IPv6 address has eight groups of four hexadecimal digits - from 0 to 9 and from A to F. The cause of this transformation is the significantly smaller number of unique IPs which the present system supports as well as the rapid increase of gadgets that are connected to the world wide web. An example of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you want to direct a domain to a server which uses this kind of an address, you will need to create an AAAA record for it, and not the widespread A record, that is an IPv4 address. Both records have the very same function, but different notations are used, to differentiate the two forms of addresses.