AAAA is a domain address record, which is essentially the IPv6 address of the web server in which the domain is hosted. The IPv6 system was designed to replace the current IPv4 system where every IP comprises of 4 groups of decimal numbers which range from 1 to 255 e.g. 18.104.22.168. In comparison, an IPv6 address includes eight sets of 4 hexadecimal numbers - ranging from 0 to 9 and from A to F. The cause of this modification is the considerably smaller amount of unique IPs the current system supports and also the speedy increase of products which are connected to the Internet. An illustration of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you need to point a domain address to a machine which uses this sort of an address, you will need to set up an AAAA record for it, and not the widespread A record, that is an IPv4 address. The 2 records provide the exact same function, but different notations are used, so as to separate the two types of addresses.