When it comes to IP addresses, we differentiate between IPv4 and IPv5 addresses. An IPv4 address consists of four blocks of numbers divided by a full stop. In each block, any number between 0 and 225 can be used, which results in roughly 4.3 billion possible addresses. As the internet has grown so rapidly over the last few years, and will continue to grow in the future, this number is quickly becoming insufficient. This is why the IPv6 format is currently being introduced as the new norm, which can generate roughly a sextillion new addresses. The structure of IPv6 addresses is less clear, as it uses both numbers and letters in eight separate blocks.
Your IP address is never just a random sequence of numbers or letters. Specific IP areas are allocated to certain providers, or to big companies. There is no country code, like the one found in telephone numbers, when it comes to IP addresses though. Rather the IP address can be found through the so-called dial-up node. It also shows which browser and operating system is being used. The internet provider can receive information on the user's online behavior during a web browsing session through the IP address. The regulations on what happens to this data after the browsing session is finished also varies depending on the country.