Companies switch on for World IPv6 Day
Event sees several companies turn on their IPv6 networks permanently

A number of companies around the globe are permanently turning on their IPv6 networks to mark IPv6 World Launch day today, June 6th.
The event, sponsored by the nonprofit Internet Society, is occurring for the second year running. Last year IPv6 networks were turned on for a 24-hour period for testing and the event was declared a success.
The companies that are involved in this launch event include internet service providers, networking equipment manufacturers such as Cisco and D-Link, web services providers such as Facebook, Google, Microsoft and Yahoo, among others.
The world is currently the IPv4, but those addresses are rapidly running out. IPv4 uses 32 bits for an address and supports around 4 billion IP addresses. In contrast, IPv6 uses 128 bits for an address.