Every single device that is connected to the web has a distinctive identifier known as IP (Internet Protocol) address. This includes computer systems, web servers, smartphones, switches, etcetera. The pool of IPs, that was introduced at first, has already been distributed, hence the so-called IPv4 IP addresses are steadily getting replaced with IPv6 addresses. Every domain name that opens a website has an IP record, which is the address of the server where it is hosted. Using the IPv4 system, the record is called A and it is comprised of 4 groups of numbers from 1 to 255 split up using a dot, while in the IPv6 system it is called AAAA and it is comprised of 8 groups of hexadecimal numbers i.e. this kind of records use numbers 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 significantly larger amount of IPs than the IPv4 format.