An AAAA record is an IP in the freshly introduced IPv6 format and it is made up of eight sets of hexadecimal numbers, unlike the IPv4 IPs, that include four sets of digits in between 1 and 255. A good example of an IPv6 address is 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and with this format the sheer number of IPs which can be created is many times greater than the number of the IPv4 addresses. Each and every domain name has its hosting server Internet protocol as a record and in essence, that record tells the domain name where the website for it can be found. Depending on the system which the company uses, the record is going to be called A (IPv4) or AAAA (IPv6). Changing this record allows you to host your website with one company and your email messages with another, 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 set up an AAAA record for it.