[axod]

> "It isn't running out. It is out."

I think that's an unfair assessment.

When every ipv4 address is actually used, it'll have run out. We're a long long way away from that scenario though.

Vast ranges are "allocated" but "unused".

[michaelbuckbee]

That's actually something I've been having a hard time finding: What percentage of IPv4 addresses are currently in use.

[axod]

Probably wouldn't take too long to check what % are pingable, which would give you a lower bound.

[jefe78]

I'm willing to bet it would ;)

[axod]

By my calculations, you'd only need to spin up 50 or so amazon instances, and they could cover the entire IP space in a day doing 1k pings/second each.

That's pretty doable.

[zaphoyd]

These guys have been mapping the IPv4 space via ping over time (since 2003) and have an interactive browsable map that also shows blocks marked for localhost/private networks/multicast, etc and which registrars control which regions. It is pretty neat. Most recent data is Nov 2010. Since then the 11 /8 blocks that show as free have been allocated.

http://www.isi.edu/ant/address/

[jefe78]

Thats still not an insignificant amount of time/effort. I'd love to see someone do this though!

[jedsmith]

I meant that its time is out, not the addresses themselves.