An AAAA record is an Internet protocol address in the recently introduced IPv6 format and it is comprised of eight different sets of hexadecimal numbers, unlike the IPv4 IPs, that include four sets of digits between 1 and 255. A good 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 could be created is many times greater than the number of the IPv4 addresses. Each and every domain has its hosting server Internet protocol address as a record and in essence, this record tells the domain address where the site for it is. Depending on the system which the company employs, the record will be called A (IPv4) or AAAA (IPv6). Changing this record will allow you to host your Internet site with one company and your emails with a different one, so if you choose to use such a redirection to point a domain to a server that uses an IPv6 address, you'll need to create an AAAA record for it.