Every device that is connected to the Internet has a specific identifier referred to as IP (Internet Protocol) address. This includes PCs, web servers, smartphones, switches, etc. The pool of IPs, that was introduced initially, has been distributed, therefore the so-called IPv4 IP addresses are gradually getting replaced with IPv6 addresses. Every domain that opens an internet site has an IP record, that is the address of the server where it is hosted. Using the IPv4 system, the record is called A and it comprises of 4 sets of numbers from 1 to 255 separated by a dot, while in the IPv6 system it's called AAAA and it is made up of eight groups of hexadecimal numbers i.e. this type 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 considerably bigger amount of IPs in comparison with the IPv4 format.