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There are no more, but there are a lot wasted. In the early days when it was assumed everything would be publicly accessible, large organizations were given cla

There are no more, but there are a lot wasted. In the early days when it was assumed everything would be publicly accessible, large organizations were given class A's or more.

p1mrx 7y ago
There's a lot of wasted land too (e.g. single-story buildings in the Bay Area.) In any case, many of those "wasted" /8s have been resold for $100M+ in the last decade. Grep this page for "formerly" https://en.wikipedia.org/wiki/List_of_assigned_/8_IPv4_address_blocks https://en.wikipedia.org/wiki/List_of_assigned_/8_IPv4_addre...
Dagger2 7y ago
Not as much as you think. There are only about 20 /8s owned by companies (and those companies are using those /8s for their networks!). Before IANA runout in 2011 we were going through one /8 every month; given that demand has only gone up since then, 20 /8s would be, what, a 12 month supply or so? v4 is just too small, and no amount of pushing allocations around is going to change that.
- nucleardog 7y ago
  While the addresses are largely in use (though I'd wager ham radio operators aren't using much of 44/8), are they really necessary? Does the UK Ministry of Defense actually have 16 million devices that need publicly routable addresses? Or could they be doing what almost everyone else is doing and using a handful of publicly routable addresses and private IP ranges behind them?
  - Dagger2 7y ago
    No, of course they're not necessary. They could turn off all their computers and then they wouldn't need any address space at all. But there are benefits to having networked computers, and there are benefits to doing that networking correctly and not paying the costs of NAT and overlapped address space. It would take them years to renumber off of their /8, at great cost and with the result of an increased ongoing operational cost, and for what benefit? That /8 would last the public internet for less than a month. It's not like the people who are yet to deploy v6 are suffering a lack of time, so buying them an extra month which they would then squander isn't going to be very helpful.
rednixion 7y ago
Classless networking used to not exist and a lot of universities being early adopters and some companies ended up with with class B's at least. Anyone in the US(who isn't one of the said universities) likely already had the address range taken back due to noteworthy underutilization though. We lost two class C's a few years ago due to this reason but it was hard to complain about since we weren't really using them.

There are no more, but there are a lot wasted. In the early days when it was assumed everything would be publicly accessible, large organizations were given class A's or more.

p1mrx 7y ago

There's a lot of wasted land too (e.g. single-story buildings in the Bay Area.) In any case, many of those "wasted" /8s have been resold for $100M+ in the last decade. Grep this page for "formerly" https://en.wikipedia.org/wiki/List_of_assigned_/8_IPv4_address_blocks https://en.wikipedia.org/wiki/List_of_assigned_/8_IPv4_addre...

Dagger2 7y ago

Not as much as you think. There are only about 20 /8s owned by companies (and those companies are using those /8s for their networks!). Before IANA runout in 2011 we were going through one /8 every month; given that demand has only gone up since then, 20 /8s would be, what, a 12 month supply or so? v4 is just too small, and no amount of pushing allocations around is going to change that.

nucleardog 7y ago
While the addresses are largely in use (though I'd wager ham radio operators aren't using much of 44/8), are they really necessary? Does the UK Ministry of Defense actually have 16 million devices that need publicly routable addresses? Or could they be doing what almost everyone else is doing and using a handful of publicly routable addresses and private IP ranges behind them?
- Dagger2 7y ago
  No, of course they're not necessary. They could turn off all their computers and then they wouldn't need any address space at all. But there are benefits to having networked computers, and there are benefits to doing that networking correctly and not paying the costs of NAT and overlapped address space. It would take them years to renumber off of their /8, at great cost and with the result of an increased ongoing operational cost, and for what benefit? That /8 would last the public internet for less than a month. It's not like the people who are yet to deploy v6 are suffering a lack of time, so buying them an extra month which they would then squander isn't going to be very helpful.

rednixion 7y ago

Classless networking used to not exist and a lot of universities being early adopters and some companies ended up with with class B's at least. Anyone in the US(who isn't one of the said universities) likely already had the address range taken back due to noteworthy underutilization though. We lost two class C's a few years ago due to this reason but it was hard to complain about since we weren't really using them.