202203071610.AYC Re: Making Use of 240/4 NetBlock

William Herrin bill at herrin.us
Fri Mar 11 04:16:13 UTC 2022

On Thu, Mar 10, 2022 at 7:51 PM Abraham Y. Chen <aychen at avinta.com> wrote:
> 1)    " ...  should be ...  ":    Instead of "hand wave", this is a diplomatic expression to challenge the software engineers' knowledge of the networking program code for the current case. Ever since we started our study, we were quite puzzled by why the 240/4 netblock was regarded so special? Why no one could tell us what led to its current status, and even after IPv4 was set to transition to IPv6?


Which leads to RFC 1112 section 4, the disposition of which last
changed in 1989.

You are now informed about its current status along with when and how
it got to be that way.

Bill Herrin

William Herrin
bill at herrin.us

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