AAAA is a domain address record, that is basically the IPv6 address of the web server where the domain is hosted. The IPv6 system was intended to replace the current IPv4 system where each and every IP address is comprised of four groups of decimal numbers between 1 to 255 e.g. 188.8.131.52. On the other hand, an IPv6 address includes eight sets of four hexadecimal numbers - ranging from 0 to 9 and from A to F. The reason for this transformation is the considerably smaller amount of unique IPs that the existing system supports and the quick increase of devices which are connected to the Internet. An illustration of an IPv6 address would be 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you need to point a domain name to a server that uses this sort of an address, you'll have to create an AAAA record for it, not the commonly used A record, which is an IPv4 address. Both records deliver the same exact function, but different notations are used, so as to identify the two types of addresses.