To be fair, four of the five boroughs have greater populations than multiple states (Staten Island being the exception). I don’t think any other city in the US has comparable subdivisions.
It’s also hard to overstate the historical and cultural significance of NYC in the US. And this is coming from a New Englander who is obliged to say, “New York sucks.”
If you are a homeowner, property transaction records are public information in the US. Plenty of data brokers collate from the numerous city/county databases for those who only know your name.