An AAAA record is an IP address in the recently presented IPv6 format and it consists of 8 different groups of hexadecimal numbers, in contrast to the IPv4 IPs, which feature 4 sets 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 sheer number of IPs which can be created is many times larger than the number of the IPv4 addresses. Each and every domain name has its web hosting server IP address as a record and in essence, this record instructs the domain address where the website for it can be found. Depending on the system the service provider uses, the record is going to be called A (IPv4) or AAAA (IPv6). Changing this record will allow you to host your site with one provider and your e-mails with a different one, so if you choose to use this type of redirection to point a domain to a server that uses an IPv6 address, you will need to set up an AAAA record for it.