AAAA is a domain name record, that is in essence the IPv6 address of the server in which the domain name is hosted. The IPv6 system was introduced to replace the existing IPv4 system where each and every IP is made up of 4 groups of decimal numbers which range from 1 to 255 e.g. 220.127.116.11. In comparison, an IPv6 address has 8 sets of 4 hexadecimal numbers - ranging from 0 to 9 and from A to F. The reason behind this transformation is the substantially smaller range of unique IPs the current system supports and also the speedy increase of devices that are connected to the world wide web. An illustration of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you'd like to point a domain address to a web server that uses this type of an address, you'll have to set up an AAAA record for it, and not the widely used A record, which is an IPv4 address. The 2 records deliver the very same function, but different notations are used, so as to identify the two types of addresses.