Every device that's connected to the world wide web has a distinctive identifier referred to as IP (Internet Protocol) address. This includes computer systems, web servers, smartphones, switches, etcetera. The pool of IPs, that was introduced at first, has been distributed, therefore the so-called IPv4 IP addresses are progressively being replaced with IPv6 addresses. Every domain name that opens an internet site comes with an IP record, which is the address of the server where it is hosted. When using the IPv4 system, the record is called A and it comprises of 4 groups of numbers from 1 to 255 divided with a dot, while with the IPv6 system it's called AAAA and it comprises of eight groups of hexadecimal numbers i.e. this sort of records use digits from 0 to 9 and letters from A to F. An example of an AAAA record is 2010:0c48:43d3:2142:1012:8c3a:2475:2435 and this format works with a considerably larger amount of IPs than the IPv4 format.