An AAAA record is an IP address in the freshly introduced IPv6 format and it comprises of 8 groups of hexadecimal numbers, as opposed to the IPv4 IPs, which feature four groups of numbers between 1 and 255. A good example of an IPv6 address is 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and with this format the sheer number of IPs that could be created is many times higher than the number of the IPv4 addresses. Every domain has its hosting server IP address as a record and in essence, that record instructs the domain where the Internet site for it is. Depending on the system that the service provider employs, the record is going to be called A (IPv4) or AAAA (IPv6). Changing this record allows you to host your Internet site with one provider and your emails with a different one, so if you choose to use such a redirection to forward a domain address to a server that uses an IPv6 address, you'll have to create an AAAA record for it.