An AAAA record is an Internet protocol address in the recently presented IPv6 format and it is comprised of 8 different sets of hexadecimal digits, in contrast to the IPv4 IPs, that include 4 groups of numbers in between 1 and 255. An illustration of an IPv6 address is 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and in this format the number of IPs that can be created is many times greater than the number of the IPv4 addresses. Every domain has its website hosting server IP address as a record and in essence, this unique record informs the domain where the site for it is located. Depending on the system which the provider uses, the record will be called A (IPv4) or AAAA (IPv6). Changing this record allows you to host your website with one provider and your emails with a different one, so if you choose to use this kind of redirection to point a domain address to a server that uses an IPv6 address, you'll need to create an AAAA record for it.