AAAA is a domain name record, which is essentially the IPv6 address of the server where the domain name is hosted. The IPv6 system was designed to replace the present IPv4 system in which every single IP address consists of four sets of decimal numbers which range from 1 to 255 e.g. 126.96.36.199. On the other hand, an IPv6 address features eight sets of 4 hexadecimal numbers - from 0 to 9 and from A to F. The cause of this change is the tremendously smaller amount of unique IPs which the existing system supports and the speedy increase of gadgets which 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 direct a domain name to a machine that uses this sort of an address, you have to create an AAAA record for it, not the commonly used A record, which is an IPv4 address. The two records provide the very same function, but different notations are used, to differentiate the two sorts of addresses.