AAAA is a domain record, that is basically the IPv6 address of the web server where the domain name is hosted. The IPv6 system was designed to replace the existing IPv4 system where each and every IP address consists of four groups of decimal digits between 1 to 255 e.g. 184.108.40.206. In contrast, an IPv6 address includes eight groups of 4 hexadecimal numbers - which range from 0 to 9 and from A to F. The reason for this transformation is the considerably smaller number of unique IPs the existing system supports and also the quick increase of units which are connected to the Internet. 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 machine which uses this type of an address, you will need to create an AAAA record for it, and not the commonly used A record, that is an IPv4 address. The two records have the very same function, but different notations are used, to identify the two sorts of addresses.