AAAA is a domain address record, that's basically the IPv6 address of the web server where the domain is hosted. The IPv6 system was introduced to replace the current IPv4 system where each IP is made up of four sets of decimal digits which range from 1 to 255 e.g. 18.104.22.168. In contrast, an IPv6 address has eight sets of 4 hexadecimal digits - which range from 0 to 9 and from A to F. The reason for this transformation is the significantly smaller amount of unique IPs that the present system supports and also the speedy increase of gadgets that are connected to the world wide web. An example of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you want to direct a domain name to a server that uses this type 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 deliver the exact same function, but different notations are used, so as to separate the two types of addresses.