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240/4 can be hijacked/used as private IP space currently by a lot of devices. I think Windows might be the hold out. But for internal routing and IoT it’s very useful. Can never be used as publicly routable space.

I’d like to see it added to the official list of private space alongside RFC1918.



Not sure why you'd need more than 10/8, but I suppose it looks even cooler too those who know and find such things cool.

Does Windoze prevent you from using certain IPv4 addresses?


> Not sure why you'd need more than 10/8

Large organizations have moved to IPv6 because they, and everyone else, are using 10/8, and so when mergers and acquisitions happen trying to connect the networks together becomes a nightmare.

See this talk from Wells Fargo as an example:

* https://www.youtube.com/watch?v=EzTWjNUb4H4


The pain of merging acquired company networks cannot be overstated!

IPv6 can help, but in my experience there's just soo much old IPv4 tech that no one is prepared to migrate to IPv6.


Aws sized companies, we also use them in aws. And no doesn't work on windows.


https://www.ietf.org/archive/id/draft-schoen-intarea-unicast... is a nice historical overview of 240/4




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