Hey fediverse folk! Is there somewhere a map of federation/defederation of fediverse? I mean which instances see/listen to which other instances (since the relationship is asymmetrical). Does not have to be graphical, but ideally searchable (text files?).

Point is, I suspect my home instance might be blocked by some other instances I am interested in and I have no way to know whether people out there will even see my toots if I speak to them first.

Any explanations and pointers appreciated. Thanks.