AAAA is a domain record, that is in essence the IPv6 address of the web server where the domain is hosted. The IPv6 system was introduced to replace the existing IPv4 system where every single IP is made up of four groups of decimal digits ranging from 1 to 255 e.g. 5.168.208.143. In contrast, an IPv6 address includes eight sets of 4 hexadecimal numbers - from 0 to 9 and from A to F. The reason behind this transformation is the considerably smaller range of unique IPs that the present system supports as well as the quick increase of gadgets 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 want to direct a domain address to a machine that uses this type of an address, you will need to set up an AAAA record for it, and not the widely used A record, which is an IPv4 address. The two records provide the very same function, but different notations are used, so as to differentiate the two forms of addresses.
