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 designed to replace the existing IPv4 system where every Internet protocol address is made up of four groups of decimal numbers which range from 1 to 255 e.g. 184.108.40.206. In contrast, an IPv6 address features eight sets of four hexadecimal numbers - ranging from 0 to 9 and from A to F. The reason behind this modification is the considerably smaller range of unique IPs that the present system supports and also the quick increase of units which are connected to the world wide web. An example of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you wish to forward a domain to a machine which uses this type of an address, you will have to create an AAAA record for it, and not the commonly used A record, that is an IPv4 address. The 2 records provide the same exact function, yet different notations are used, to separate the two sorts of addresses.