AAAA is a domain name record, that's basically the IPv6 address of the web server in which the domain name is hosted. The IPv6 system was intended to replace the present IPv4 system where every Internet protocol address consists of four groups of decimal digits which range from 1 to 255 e.g. 126.96.36.199. In comparison, an IPv6 address has eight sets of 4 hexadecimal numbers - from 0 to 9 and from A to F. The cause of this transformation is the tremendously smaller amount of unique IPs which the current system supports as well as the quick 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'd like to point a domain to a machine that uses such an address, you will need to set up an AAAA record for it, and not the widespread A record, which is an IPv4 address. The two records deliver the exact same function, yet different notations are used, in order to identify the two sorts of addresses.