AAAA is a domain record, which is essentially the IPv6 address of the web server in which the domain name is hosted. The IPv6 system was intended to replace the current IPv4 system where every single IP address is comprised of 4 groups of decimal numbers which range from 1 to 255 e.g. 126.96.36.199. However, an IPv6 address features 8 groups of four hexadecimal numbers - from 0 to 9 and from A to F. The reason for this transformation is the tremendously smaller selection of unique IPs that the present system supports and the speedy increase of gadgets which are connected to the world wide web. An illustration of an IPv6 address would be 2101:1f34:32e2:2415:1365:4f2b:2553:1345. If you'd like to point a domain name to a server which uses this type of an address, you will have to set up an AAAA record for it, and not the widely used A record, which is an IPv4 address. Both records deliver the same exact function, yet different notations are used, to identify the two sorts of addresses.