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There are no more IP addresses... Well, sort of...
IPv4 allows 32 bits for an Internet Protocol address, and can therefore support 232 (4,294,967,296) addresses.
This is a lot of IP addresses, however, remember that today there are not just computers with IP addresses... SmartPhones, iPads, routers, even cameras can have IP addresses.
On February 3, 2011, in a ceremony in Miami, the Internet Assigned Numbers Authority (IANA) assigned the last batch of 5 /8 address blocks to the Regional Internet Registries.,[8] officially depleting the global pool of completely fresh blocks of addresses.[9] Each of the address blocks represents approximately 16.7 million possible addresses, or over 80 million combined potential addresses.
These addresses could well be fully consumed within three to six months of that time at current rates of allocation.[10] APNIC was the first RIR to exhaust its regional pool on 15 April 2011, except for a small amount of address space reserved for the transition to IPv6, which will be allocated in a much more restricted way.[11]
So, the IPv4 IP addresses have all be allocated and there can be no more. Of course, the old ones are reused, but with more and more products being purchased and more and more people getting online in 3rd world countries, there needs to be more addresses. This is where IPv6 comes in...
A typical IPv6 IP address will look like this:
2001:0db8:85a3:0000:0000:8a2e:0370:7334
This new address space supports 2128 (approximately 340 undecillion or 3.4×1038) addresses.
But for IPv6 to work there needs to be changes made to ALL the ISP servers around the world in order for them to "understand" the IPv6 addresses and send the packets of data identified with this new address to and from correctly. This takes time for all the ISPs to implement the new standard and have it work with the old standard... Or have both working at the same time until the transition is complete.
http://CloudFlare.com (http://en.wikipedia.org/wiki/Cloudflare) is a content delivery network and distributed Domain Name Server service aimed at enhancing website performance and speed and providing security. CloudFlare offers both free and paid services
What CloudFlare has done is create their own system (currently in beta) that understand an IPv6 address and "translates" it to an IPv4 and passes it along to your website. IOW, it works as a "middle man" so that people with IPv6 can get to your website even if the ISP hosting your website is not equiped with the IPv6 recognition software yet.
If you have an online business, website, or blog, I suggest you use CloudFlare's free service to (1) enhance your website performance, speed and security, and to make your site available to IPv6 visiters.
Trishah
> Sent: Thursday, September 22, 2011 12:23 AM
> Subject: [CloudFlare] Automatic IPv6 Beta Test
>
> As a thank you for being one of CloudFlare's first users, we're giving
> you a sneak peak at a new feature we're rolling out later this month:
> Automatic IPv6.
>
> Today about 1% of Internet surfers can't get to your site. These surfers are
> on an IPv6-only network and their entire Internet universe consists of only
> about 6,000 websites. To put that in perspective, that's like the Internet
> circa 1996. The other 99% of Internet surfers use the IPv4 network and can get
> to your site no problem since it running on IPv4 infrastructure. But the number
> of IPv4 addresses is running out, and the 1% of visitors on IPv6 will soon be 2%
> and eventually most new web surfers will only have IPv6. That means before long,
> if something doesn't change, most surfers on the web won't be able to
> see your site.
>
> That seemed like a really gloomy outcome, so CloudFlare's engineers have
> spent the last year working on a way to ensure every web visitor can get to your
> website. Our new Automatic IPv6 feature means that with one click, your site is
> accessible to both the IPv4 Internet and the IPv6 Internet as well. We've
> enabled this feature on your CloudFlare Settings page for all the sites you have
> active on CloudFlare. You can enable the option by going to:
>
> CloudFlare.com > My websites > Settings (pull down menu) > CloudFlare
> Settings > Automatic IPv6: on
>
> You do not need to make any changes to your DNS Settings. With one-click, IPv6
> will "just work" for your site.
>
> We're currently in a quiet beta period where we're testing it in a
> limited number of data centers. After you've enabled the feature, give it
> about 10 minutes for the DNS records to propagate then visit an IPv6 testing
> tool like:
>
> http://cloudflare.ipv6-test.com/validate.php
>
> We've been quietly testing the Automatic IPv6 feature for a while and so far
> we haven't seen any significant issues. Let us know if you encounter any
> problems by emailing:
>
> ipv6-help@cloudflare.com
>
> CloudFlare's mission is to make the entire Internet faster and safer, so we
> will be providing Automatic IPv6 for all our users for free. Until we announce
> it publicly, we ask that you keep quiet about the feature and not write about it
> on blogs or post on Twitter. We plan on publicly announcing the new feature, and
> opening it to the entire CloudFlare community, on Sept. 29. We hope you
> won't mind waiting until then to talk about it.
>
> This is save-the-Internet kind of stuff, and we appreciate your help making it
> happen.
>
> Sincerely,
> The CloudFlare Team
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