An AAAA record is an IP in the freshly released IPv6 format and it is comprised of eight different groups of hexadecimal digits, in contrast to the IPv4 IPs, which include four sets of digits between 1 and 255. An example of an IPv6 address would be 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and in this format the total number of IPs which can be created is many times higher than the number of the IPv4 addresses. Every single domain has its hosting server IP address as a record and in essence, that record tells the domain address where the site for it is. Depending on the system that the service provider uses, the record is going to be called A (IPv4) or AAAA (IPv6). Changing this record permits you to host your website with one provider and your e-mails with a different one, so if you choose 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.