Top Definition
A way of "addressing" computers on the Internet, just like phone numbers in a phone book.

IPv6 is a newer scheme to IPv4, and was developed because we have virtually run out of IPv4 addresses.

There are around 4 billion IPv4 addresses -- not even enough for everyone in the world to have their own address! IPv6 has so many more addresses that it would give everyone in the world about 6 billion addresses _each_!
Donald: My IPv6 address is 2001:db8::fd41:87.
Bob: Waah! My IPv4 is 202.76.9.20! That's so uncool!
by jeremy23 November 21, 2008
The latest version of the internet protocol which provides an address to every computer, network device, or net-enabled device. IPv6 went live June 6, 2012. IPv6 makes several changes over IPv4, most of all increasing the number of IPs from 2^32, to 2^128. In lamens terms, it increases the number of IP addresses from around 4 million to an unimaginable number, where there will now be 1000 IP addresses for every grain of sand on the Earth.
3,400,000,000,000,000,000,000,000,000,000,000,000,000 IPs are available via IPv6.
by yChris July 10, 2012
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