Every device that is connected to the world wide web has a distinctive identifier known as IP (Internet Protocol) address. This includes PCs, web servers, smartphones, switches, etcetera. The pool of IP addresses, which was introduced at first, has already been distributed, hence the so-called IPv4 IP addresses are steadily being replaced with IPv6 addresses. Every domain name which 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 made up of four sets of numbers from 1 to 255 divided by a dot, while within the IPv6 system it is called AAAA and it consists of eight groups of hexadecimal numbers i.e. this sort 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 when compared with the IPv4 format.