AAAA is a domain name record, which is basically the IPv6 address of the web server where the domain is hosted. The IPv6 system was intended to replace the present IPv4 system in which each and every IP address is comprised of 4 sets of decimal digits ranging from 1 to 255 e.g. 126.96.36.199. On the other hand, an IPv6 address features 8 sets of four hexadecimal numbers - from 0 to 9 and from A to F. The cause of this transformation is the considerably smaller number of unique IPs that the present system supports as well as the rapid increase of units 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 need to forward a domain name to a machine that uses this kind of an address, you will have to create an AAAA record for it, not the commonly used A record, which is an IPv4 address. The two records provide the exact same function, yet different notations are used, in order to differentiate the two sorts of addresses.