AAAA is a domain name record, that is in essence the IPv6 address of the web server in which the domain is hosted. The IPv6 system was intended to replace the present IPv4 system in which every single Internet protocol address comprises of four sets of decimal numbers which range from 1 to 255 e.g. 126.96.36.199. On the other hand, an IPv6 address includes 8 groups of 4 hexadecimal numbers - which range from 0 to 9 and from A to F. The reason for this change is the tremendously smaller range of unique IPs the current system supports and also the speedy increase of devices which are connected to the world wide web. An illustration of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you want to point a domain address to a web server that uses this type of an address, you need to set up an AAAA record for it, not the widely used A record, that is an IPv4 address. Both records have the same exact function, yet different notations are used, to distinguish the two sorts of addresses.