An AAAA record is an Internet protocol address in the newly launched IPv6 format and it is made up of eight groups of hexadecimal numbers, as opposed to the IPv4 IPs, that include 4 groups of numbers in between 1 and 255. An example of an IPv6 address is 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and with this format the amount of IPs which can be created is many times larger than the number of the IPv4 addresses. Every domain has its hosting server Internet protocol as a record and in essence, that record informs the domain name where the Internet site for it is located. Depending on the system that the provider employs, the record will be called A (IPv4) or AAAA (IPv6). Changing this record will allow you to host your site with one company and your emails with a different one, so if you choose to use this kind of redirection to point a domain to a server that uses an IPv6 address, you will have to set up an AAAA record for it.