An AAAA record is an IP address in the recently released IPv6 format and it is comprised of 8 different groups of hexadecimal digits, in contrast to the IPv4 IPs, that include 4 sets of digits between 1 and 255. An illustration 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 greater than the number of the IPv4 addresses. Each domain name has its hosting server IP address as a record and in essence, that record informs the domain where the website for it is. Depending on the system which the service provider uses, the record will be called A (IPv4) or AAAA (IPv6). Changing this record enables you to host your website with one company and your email messages with another, so if you choose to use such a redirection to forward a domain name to a server that uses an IPv6 address, you'll have to create an AAAA record for it.