The successor to IPv4, IPv6, starts rolling out today.
An unique IP (Internet Protocol) address is given to every device connected to the internet, and are all currently under the IPv4 system. This system allows for around 4 billion unique IP addresses; which is nowhere near enough for how many devices are connected to the internet, never mind how many they may be in the future.
Because of this the new IPv6 piping system is being rolled out worldwide, which allows for a massive 340 ‘trillion trillion trillion’ (340,000,000,000,000,000,000,000,000,000,000,000,000).
The transition from IPv4 to IPv6 starts today, June 6, however there is no need to worry, there is no need for you to do anything, it will upgrade automatically (with a little help from the people behind website and internet service and equipment providers, of course). If you really want to, Google have a tool to check if you are IPv6 ready.