An AAAA record is an IP in the recently presented IPv6 format and it comprises of 8 groups of hexadecimal digits, in contrast to the IPv4 IPs, which include 4 sets of numbers between 1 and 255. An example of an IPv6 address would be 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and in this format the number of IPs that may be created is many times bigger than the number of the IPv4 addresses. Every domain has its hosting server IP as a record and in essence, that record informs the domain address where the Internet site for it is. Depending on the system which the service 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 type 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.