Each device which is connected to the world wide web has a specific identifier called IP (Internet Protocol) address. This includes computer systems, web servers, smart phones, switches, etcetera. The pool of IP addresses, that was introduced initially, has already been distributed, therefore the so-called IPv4 IP addresses are gradually getting replaced with IPv6 addresses. Every domain
that opens a site has an IP record, that is the address of the server where it's hosted. With the IPv4 system, the record is called A and it is comprised of 4 sets of numbers from 1 to 255 divided by a dot, while with the IPv6 system it is called AAAA and it is comprised of eight groups of hexadecimal numbers i.e. this type of records use digits from 0 to 9 and letters from A to F. A good example of an AAAA record is 2010:0c48:43d3:2142:1012:8c3a:2475:2435 and this format works with a substantially greater amount of IPs than the IPv4 format.