It's also inflated by large companies with dozens of class A networks, but who actually need a total of maybe just a few class C subnets. I once worked for a company with tens of thousands of computers that were using public IP addresses, but they were all completely firewalled, and they used proxies for limited Internet access.

▲

toast0 10 hours ago | parent | next [-]

Which company has dozens of class A networks? The only one I'm aware of with two is HP who had 15/8 and 16/8, but I think they returned at least a significant amount of that.

BBN/successors may have held multiple class As at times, but being large ISPs probably used a lot of the space? Various clouds have a lot of space, but afaik, not in the form of whole class As.

Looks like IBM probably had multiple class As through acquisition, but I don't think they still hold them either?

▲

dfc 10 hours ago | parent | prev [-]

Do you have any examples of large companies that have multiple /8s but can get away with a /21?

	▲	anonymousiam 4 hours ago \| parent [-]
		Hughes had many class As. Rockwell had a few. McDonnell Douglas had some. Boeing had a few. Boeing eventually acquired all of the above. It's possible that they've divested some of them by now. I haven't worked there for almost 10 years.