AAAA is a domain address record, that's in essence the IPv6 address of the web server in which the domain name is hosted. The IPv6 system was introduced to replace the existing IPv4 system where each and every Internet protocol address is comprised of four groups of decimal digits which range from 1 to 255 e.g. 5.168.208.143. In contrast, an IPv6 address features 8 groups of 4 hexadecimal digits - ranging from 0 to 9 and from A to F. The main reason for this modification is the tremendously smaller range of unique IPs which the present system supports as well as the rapid increase of products that are connected to the Internet. A good example of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you wish to direct a domain address to a machine which uses this sort of an address, you will have to create an AAAA record for it, and not the widely used A record, which is an IPv4 address. The two records provide the exact same function, but different notations are used, to differentiate the two sorts of addresses.