22 Oct 16

What is IPv6

Every device connected to the Internet needs a unique Internet Protocol (IP) address so it can communicate with other devices. IP addresses identify devices within networks, allowing the Internet’s routing system to transfer packets of data between hosts (such as a computer, website, or mobile device). IPv4 and IPv6 are the forms of IP addresses in use today.

An IPv4 address is a 32-bit number, such as There are (around 4.3 billion) unique IPv4 addresses, a large proportion of which is already deployed. 

An IPv6 address is a 128-bit number, written in hexadecimal notation, such as
fc3b:0db8:85a3:0042:1000:8a2e:0370:7334. There are 2128 (around 340 trillion trillion trillion, or ~1038) unique IPv6 addresses. 

The massive pool of IPv6 addresses will enable growth of the Internet well into the future.

Read or download (PDF): Netnod Fact Sheet - What is the IPv6?