Here you can check the instances that have bloakced kbin.social: https://fba.ryona.agency/?domain=kbin.social

Now this link: https://kbin.social/communities should work be to find the instances that kbin.social is federated with but somehow it's giving me error 404.

It's odd that kbin.social doesn't provide a list of Lemmy instances it federates with. For a regular Lemmy instance you just click on the Instances link at the bottom of the page.

See this link for the list of instances blocking kbin.social: https://fba.ryona.agency/?domain=kbin.social

@Web_Rand Thank you for the link and for this question. My opinion - kbin-social should block the lemmy.ml and lemmygrad instances for the same reason that Mastodon Art is blocking us.