Every device that's connected to the web has a distinctive identifier referred to as IP (Internet Protocol) address. This includes computers, web servers, smartphones, switches, etcetera. The pool of IP addresses, that was introduced initially, has been distributed, so the so-called IPv4 IP addresses are progressively being replaced with IPv6 addresses. Every domain name that opens an internet site has an IP record, that is the address of the server where it is hosted. When using the IPv4 system, the record is called A and it is comprised of 4 sets of numbers from 1 to 255 split up by a dot, while within the IPv6 system it is called AAAA and it is made up of eight groups of hexadecimal numbers i.e. this kind of records use digits from 0 to 9 and letters from A to F. An illustration of an AAAA record is 2010:0c48:43d3:2142:1012:8c3a:2475:2435 and this format can handle a significantly larger amount of IPs compared with the IPv4 format.