AAAA is a domain record, which is in essence the IPv6 address of the web server where the domain name is hosted. The IPv6 system was introduced to replace the present IPv4 system in which each and every Internet protocol address is comprised of four groups of decimal digits between 1 to 255 e.g. 18.104.22.168. In comparison, an IPv6 address has 8 sets of four hexadecimal digits - which range from 0 to 9 and from A to F. The main reason for this change is the significantly smaller number of unique IPs which the present system supports as well as the speedy increase of gadgets which are connected to the world wide web. An example of an IPv6 address would be 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you want to forward a domain address to a web server which uses this sort of an address, you have to create an AAAA record for it, and not the commonly used A record, that is an IPv4 address. The two records deliver the very same function, yet different notations are used, in order to identify the two types of addresses.