A few recent allocations in the APNIC region to Pakistan and South Korea has pushed the global burn rate of IPv4 addresses over 3 x /8 per month. With only about 16 blocks of free IPv4 left in all pools combined, it is not hard realize that IPv6 is needed sooner rather than later.
Last time the burn rate was this high was in May 1995 when Ford, US defense agency DISA and Prudential all got one /8 allocated. At that point, IPv4 addresses was of course handed out in a very wasteful way.
Most of the IPv4 allocations are being made in the APNIC region. I must confess that the tool doesn’t do a good job of modeling the allocation spike that we are seeing in APNIC currently. A more realistic prediction is probably that APNIC will be depleted in May 2011. Some readers have suggested April. I do not believe in April, because it will be hard for members that recently got large address space allocated to justify yet another allocation prior to the depletion (A rush to concert tickets will be most severe the first couple of hours/days, then the rate will slow down even if tickets still are available)
Another interesting thing is that we clearly can see that the ARIN policy that caps the maximum allocation to a 3 month demand has kicked in. In fact, the ARIN burn rate is quite high, but there are no allocations larger than 250,000 IPv4 addresses the last 30 days.