Every single device that's connected to the world wide web has a distinctive identifier named IP (Internet Protocol) address. This includes computers, web servers, smartphones, switches, etc. The pool of addresses, that was introduced at first, has been distributed, hence the so-called IPv4 IP addresses are slowly getting replaced with IPv6 addresses. Every domain name which opens a website 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 separated using a dot, while within the IPv6 system it is called AAAA and it comprises of eight groups of hexadecimal numbers i.e. this kind of records use numbers 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 supports a significantly larger amount of IPs compared with the IPv4 format.