AAAA is a domain name record, which is essentially the IPv6 address of the web server in which the domain name is hosted. The IPv6 system was designed to replace the present IPv4 system in which each and every Internet protocol address consists of four groups of decimal numbers which range from 1 to 255 e.g. 126.96.36.199. On the other hand, an IPv6 address includes 8 sets of four hexadecimal numbers - from 0 to 9 and from A to F. The reason for this change is the considerably smaller amount of unique IPs which the existing system supports and also the quick increase of gadgets that are connected to the Internet. An illustration of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you'd like to point a domain address to a server which uses such an address, you will have to set up an AAAA record for it, not the commonly used A record, that is an IPv4 address. The two records provide the same exact function, yet different notations are used, to distinguish the two sorts of addresses.