An AAAA record is an IP address in the freshly introduced IPv6 format and it is made up of 8 different sets of hexadecimal numbers, in contrast to the IPv4 IPs, that include 4 sets of digits between 1 and 255. An example of an IPv6 address would be 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and in this format the sheer number of IPs that can be created is many times larger than the number of the IPv4 addresses. Every domain has its website hosting server IP address as a record and in essence, this record instructs the domain where the website for it is. Depending on the system which the service provider uses, the record will be called A (IPv4) or AAAA (IPv6). Changing this record allows you to host your website with one company and your e-mails with another, 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 set up an AAAA record for it.