Every device that is connected to the Internet has a specific identifier called IP (Internet Protocol) address. This includes personal computers, web servers, smartphones, switches, etc. The pool of addresses, that was introduced initially, is already distributed, so the so-called IPv4 IP addresses are steadily getting replaced with IPv6 addresses. Every domain name that opens an internet site comes with an IP record, that is the address of the server where it is hosted. With the IPv4 system, the record is called A and it comprises of four sets of numbers from 1 to 255 separated by a dot, while within the IPv6 system it is called AAAA and it is comprised of 8 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 supports a substantially larger number of IPs than the IPv4 format.