> IPv6 users now account for 45 per cent of Google visitors.<p>It's hard to estimate how increasing percentage of users with IPv6 access is impacting the demand for public IPv4 addresses. My instinct is "not by a lot", but it's interesting to think about.<p>Currently IPv6 does <i>not</i> allow you to simply do away with public IPv4 adderesses. On the ISP side that would mean providing a product that couldn't access a huge chunk of the web. On the hosting side that would mean providing a service that isn't available to a huge chunk of users. It's not viable.<p>But increasing IPv6 deployment could possibly <i>reduce</i> IPv4 demand. If you're an ISP and half of your customers' traffic is over IPv6, maybe you could densify your carrier-grade NAT setup, putting more users behind the same number of public IPs. If you're a large content provider and half of your users are over IPv6, maybe only half of your load balancers need public IPv4 addresses.<p>The question is - is any ISP or provider actually doing those things in response to increased IPv6 traffic?