An AAAA record is an IP address within the recently released IPv6 format and it is made up of 8 sets of hexadecimal numbers, in contrast to the IPv4 IPs, which feature four sets of digits in between 1 and 255. An illustration of an IPv6 address is 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and with this format the sheer number of IPs that may be created is many times larger than the number of the IPv4 addresses. Every domain has its website hosting server IP as a record and in essence, this unique record informs the domain name where the site for it can be found. Depending on the system which the provider uses, the record is going to be called A (IPv4) or AAAA (IPv6). Changing this record enables you to host your site with one company and your emails with another, so if you decide to use this sort of redirection to point a domain address to a server that uses an IPv6 address, you'll need to set up an AAAA record for it.