AAAA is a domain name record, that is basically the IPv6 address of the web server in which the domain name is hosted. The IPv6 system was intended to replace the current IPv4 system in which every IP address is made up of 4 groups of decimal digits ranging from 1 to 255 e.g. 5.168.208.143. In comparison, an IPv6 address has eight sets of four hexadecimal digits - ranging from 0 to 9 and from A to F. The reason for this transformation is the significantly smaller number of unique IPs that the current system supports and also the speedy increase of units which are connected to the world wide web. A good example of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you need to forward a domain name to a web server that uses such an address, you will need to create an AAAA record for it, and not the widespread A record, which is an IPv4 address. Both records deliver the exact same function, but different notations are used, in order to separate the two types of addresses.