From a department with only 5 precincts, I can tell you that there is VERY little communication amongst us, with regards to the dirties living in the various sites, insofar as Patrol division is concerned, at least. Consider: NYPD is divided up into 8 boroughs (Brooklyn, the Bronx and Manhattan are divided in half). Each borough has 13 precincts. Food for thought...
Also, it is a VERY common practice for dirties to use addresses that either a) straight up don't exist or b) belong to a friend of a family member or various degrees of separation like that.
I feel bad for the family living there - the dispatchers should be able to put a flag on that address, advising that it's residents are elderly and NOT harboring fugitives from justice. I know if MY department can, NYPD should be able to...