This article contains some interesting links. Again, who is looking at this? The city, tenants, speculators? Don’t end up on these lists.

https://www.nytimes.com/2018/12/04/nyregion/nyc-landlord-database-who-owns-what.html?rref=collection%2Fsectioncollection%2Frealestate&action=click&contentCollection=realestate&region=stream&module=stream_unit&version=latest&contentPlacement=10&pgtype=sectionfront