An AAAA record is an Internet protocol address in the newly introduced IPv6 format and it consists of 8 different sets of hexadecimal numbers, unlike the IPv4 IPs, which feature 4 groups 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 number of IPs which can be created is many times higher than the number of the IPv4 addresses. Every domain name has its web hosting server Internet protocol address as a record and in essence, this unique record instructs the domain address where the site for it can be found. Depending on the system that the company uses, the record is going to be called A (IPv4) or AAAA (IPv6). Changing this record allows you to host your website with one company and your emails with a different one, so if you decide to use this sort of redirection to point a domain address to a server that uses an IPv6 address, you'll have to set up an AAAA record for it.