On Sat, Mar 26, 2022, 21:42 John Gilmore <gnu@toad.com> wrote:

Today Google is documenting to its cloud customers that they should use
240/4 for internal networks. (Read draft-schoen-intarea-unicast-240 for
the citation.) We have received inquiries from two other huge Internet
companies, which are investigating or already using 240/4 as private
IPv4 address space.

I think the advice in the draft, and on the quoted page of Google cloud docs is that you can use whatever address space you want for your voc network. I think it also says that choosing poorly could make portions if the internet unreachable.

I don't see that the docs specify usage of 240/4 though.