The info in the database for barnstable county, is at the bottom of my post and i was just there last week as every year i am for vacation in august, , i have 2 portable scanner set up the same with zone 4,6 & 11. I have the conventional channels in them to.
I do not think barnstable PD ID on the system is working yet because it says future and i have their conventional which is very active and no comms on their trunk id, also sandwich conventional 460.4250 also does not work , no comms on there but there is comms on their trunk id, they do have a second conventional which is 484.8250 but have not tried it to see if there is comms on it.
The majority of police, fire, and EMS operations in Barnstable County are trunked. Check the "Massachusetts State Police Statewide" link below for details. At a minimum, ensure that 855.5375 and 854.3625 are programmed as Motorola Type II. These are the control channels for Smartzone 04 of the MSP system, which covers the majority of Cape Cod. Also, if you live in or are visiting the "lower cape" (Wellfleet, Truro, Provincetown especially) you'll want to program MSP Zones 06 and 11.
Many Cape Cod Fire Departments are licensing UHF frequencies for simulcasting. Check individual towns for details. You will definitely want these programmed in the event the MSP Zone 04 system fails.