AAAA is a domain record, that is basically the IPv6 address of the web server where the domain is hosted. The IPv6 system was intended to replace the current IPv4 system in which every IP address is made up of 4 sets of decimal digits which range from 1 to 255 e.g. 126.96.36.199. In contrast, an IPv6 address includes 8 sets of 4 hexadecimal numbers - which range from 0 to 9 and from A to F. The main reason for this transformation is the considerably smaller selection of unique IPs that the current system supports as well as the quick increase of units which are connected to the Internet. An example of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you'd like to direct a domain address to a web server that uses this kind of an address, you will need to create an AAAA record for it, not the commonly used A record, which is an IPv4 address. Both records have the very same function, but different notations are used, to separate the two sorts of addresses.