Help With County Numbering System

[GlacierClipper]

Can anyone verify these Dakota County Unit ID's?

4800 Lakeville; 4900 Apple Valley; 2600 West St. Paul; 1800 Dakota County Coroner; 2800 Dakota County Park Rangers and 3600 Inver Grove Heights?

Scott County?

9500 Shakopee Fire; 9800 Belle Plaine Fire and 9300 New Market Fire