Hi All!
A while back, I sent an email to the tor-relays-universities mailing list, announcing that we (dotsrc.org) are attempting to run fast exit nodes on the Danish national research network: https://lists.torproject.org/pipermail/tor-relays-universities/2020-December...
Since then, our ISP has told us that they still don't like the idea of running an exit node on a Danish research network IP, so they'll register an AS number and request separate IPv6 addresses to dotsrc.
As far as I know, it is still not possible to run IPv6 only exit nodes, which is why we're currently looking for a Provider Independent (PI) IPv4 address space that we can announce.
IPv4 addresses have become a scarce resource, and are too expensive for dotsrc.org to buy on the open market. If you happen to have an unused IPv4 block (or know someone who might) that you're willing to donate or let dotsrc.org announce, please contact us at staff@dotsrc.org.
https://dotsrc.org/news/2021-07-06_searching_for_ipv4_address_space/
Best regards Anders Trier Olesen staff@dotsrc.org