Every device which is connected to the Internet has a unique identifier referred to as IP (Internet Protocol) address. This includes computers, web servers, smart phones, switches, etcetera. The pool of addresses, which was introduced at first, has already been distributed, therefore the so-called IPv4 IP addresses are steadily getting replaced with IPv6 addresses. Every domain that opens a website 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 4 groups of numbers from 1 to 255 separated using a dot, while within the IPv6 system it is called AAAA and it is comprised of eight sets of hexadecimal numbers i.e. this kind 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 can handle a substantially bigger number of IPs when compared with the IPv4 format.