The friendly support at https://ipinfo.io/
Notified me that I am still listed as exit node at https://openinternet.io/tor/tor-exit-list.txt, which is strange as it is said on https://openinternet.io/ to be updated every ten minutes.
I have now mailed the sysop indicated on that page about this.
UPDATE: openinternet.io list gathers addresses from directory authorities (where I am not listed) and also from https://check.torproject.org/torbulkexitlist - where I see I am listed. I have now mailed a contact at torproject.