Leading Web content providers — including Google, Yahoo, Netflix and Microsoft — are conducting early-stage conversations about creating a shared list of customers who can access their Web sites via IPv6, the long-anticipated upgrade to the Internet’s main communications protocol.

The DNS Whitelist for IPv6 would be a list of IP addresses that have functioning IPv6 connectivity. Content providers would use this shared DNS Whitelist to serve up content to these IP addresses via IPv6 rather than through IPv4, which is the current version of the Internet Protocol. Web site visitors not listed on the DNS Whitelist for IPv6 would receive IPv4-based content.

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