"Do individual apartments and units get their own pbKEY?" is a question I get from time to time.
The answer is that it depends. US Geocoding's, Master Location Data (MLD) is a compiled list of all known addresses in the US. If we know a particular unit number for an address when we are building the data, then it will get its own pbKEY.
If we don't know the specific unit numbers for a multi-unit building, you will get the pbKEY for the address of the main building. This is referred to as the "parent" pbKEY.
------------------------------
Ellene Duffy
Technical Product Manager
PITNEY BOWES SOFTWARE
Boulder CO
------------------------------