An AAAA record is an IP in the recently launched IPv6 format and it consists of 8 different sets of hexadecimal numbers, unlike the IPv4 IPs, which feature four groups of digits between 1 and 255. An example of an IPv6 address is 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and in this format the amount of IPs that could be created is many times greater than the number of the IPv4 addresses. Every single domain has its hosting server IP as a record and in essence, this unique record tells the domain name where the Internet site for it is. Depending on the system that the service provider uses, the record is going to be called A (IPv4) or AAAA (IPv6). Changing this record permits you to host your site with one company and your emails with a different one, so if you decide to use this kind of redirection to point a domain name to a server that uses an IPv6 address, you'll have to set up an AAAA record for it.