AAAA is a domain record, that is essentially the IPv6 address of the server where the domain name is hosted. The IPv6 system was introduced to replace the current IPv4 system where each and every Internet protocol address consists of four sets of decimal digits between 1 to 255 e.g. 18.104.22.168. On the other hand, an IPv6 address has 8 sets of four hexadecimal digits - ranging from 0 to 9 and from A to F. The cause of this change is the tremendously smaller selection of unique IPs which the present system supports and also the rapid increase of products that are connected to the world wide web. An illustration of an IPv6 address would be 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you wish to point a domain address to a server which uses this kind of an address, you will have to create an AAAA record for it, and not the widely used A record, which is an IPv4 address. The 2 records provide the same exact function, yet different notations are used, so as to separate the two types of addresses.