AAAA is a domain name record, which is basically the IPv6 address of the web server in which the domain is hosted. The IPv6 system was introduced to replace the existing IPv4 system where each Internet protocol address consists of four groups of decimal numbers between 1 to 255 e.g. 126.96.36.199. On the other hand, an IPv6 address includes 8 sets of 4 hexadecimal digits - ranging from 0 to 9 and from A to F. The main reason for this transformation is the substantially smaller number of unique IPs that the present system supports as well as the quick increase of gadgets that are connected to the Internet. An illustration of an IPv6 address would be 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you want to point a domain name to a server which uses this kind of an address, you'll have to set up an AAAA record for it, and not the widespread A record, which is an IPv4 address. The two records provide the very same function, yet different notations are used, so as to differentiate the two sorts of addresses.