AAAA is a domain record, which is in essence the IPv6 address of the web server where the domain name is hosted. The IPv6 system was designed to replace the existing IPv4 system in which each and every IP address is comprised of 4 groups of decimal digits which range from 1 to 255 e.g. 188.8.131.52. On the other hand, an IPv6 address has 8 sets of four hexadecimal numbers - from 0 to 9 and from A to F. The reason for this transformation is the significantly smaller selection of unique IPs that the present system supports as well as the speedy increase of gadgets that are connected to the world wide web. A good example of an IPv6 address is 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you need to point a domain to a server which uses this kind of an address, you will have to create an AAAA record for it, and not the commonly used A record, that is an IPv4 address. The 2 records have the same exact function, but different notations are used, in order to identify the two forms of addresses.