A few are already listed in the County Sections:
--Raleigh PD has beat maps with Unit numbering in the Wake County section.
--Wake County Sheriff Unit Numbering is described in the Wake County section.
--Garner PD also has a beat map in the database.
On a really basic level Garner PD uses 81xx units for western Garner units and 82xx for Eastern Garner units.
--Fuquay Varina PD uses 7xx unit numbering.
--Wendell PD uses 11xx unit numbering.
--Zebulon PD uses 9xx unit numbering.
--Knightdale PD uses 13xx unit numbering.
--Morrisville PD uses 16xx unit numbering.
--Wake Forest PD uses 12xx unit numbering.
I know I am missing some in there somewhere.
Those are the ones I thought of right off the top of my head.
Marshall KE4ZNR
P.S. For some reason Cary PD is overly secretive of their Unit Numbering system. I have tried many times through sources to get an idea of their unit numbering layout and no success so far.