An AAAA record is an Internet protocol address within the recently launched IPv6 format and it is comprised of 8 sets of hexadecimal digits, as opposed to the IPv4 IPs, which include 4 groups of numbers between 1 and 255. A good example of an IPv6 address would be 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and with this format the number of IPs that could be created is many times higher than the number of the IPv4 addresses. Each domain name has its website hosting server IP address as a record and in essence, that record tells the domain address where the Internet site for it is located. 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 site with one provider and your email messages with a different one, so if you decide 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.