Antrim County (MI)

Unit Numbering

County Law Enforcement

71XX - Michigan State Police Post Traverse City
79XX - Michigan State Police Post Kalkaska units  
1-99 - Sheriff units (higher numbers usually marine/auxillary units) 
XX-1 - Local Municipality Police Chief/Supervisor units 
XX-2-9 - Local Municipality Police units (lower number usually higher seniority) 
An example might be: 33-1 is the police chief for Bellaire. 
33-9 might be a reserve officer for Bellaire. 

County Fire

Stations  
11-XX: Alba 
15-XX: Star Township 
22-XX: Alden 
33-XX: Bellaire 
44-XX: Central Lake 
55-XX: Elk Rapids 
66-XX: Ellsworth 
77-XX: Mancelona 
88-XX: Eastport 
99-XX: Milton
 
Equipment
XX-10-19: Chiefs & FIRE OFFICERS 
XX-20-29: Engines XX-30-39: 
Tankers XX-40-49: 
Rescue units XX-50-59: 
Misc units XX-60-69: 
EMS units XX-70-79: Medical Personnel