Unit Identification Code
The Unit Identification Code is a six character alphanumeric code that uniquely identifies each United States Department of Defense entity.
The first character is the Service Designator:
- A: US Department of Agriculture
- B: US Department of Labor
- C: US Department of Commerce
- D: US Department of Defense
- E: US Coast Guard
- F: US Air Force
- G: US Department of Transportation
- H: US Department of Health and Human Services and US Department of Education
- J: US Judicial Branch
- K: US Department of Interior
- L: US Legislative Branch
- M: US Marine Corps
- N: US Navy
- P: US Postal Service
- Q: US Department of Justice
- R: Independent US Federal agency
- S: US Department of State
- T: US Treasury Department
- U: US Department of Housing and Urban Development
- V: Other independent US Federal agency
- W: US Army
- X: US Executive Branch
- Y: State governments
- Z: International organizations and foreign governments
| Type: Army organization | Second position of the UIC |
| TOE units | Alphabetic |
| Active Component units | A–L |
| Army Prepositioned Stocks | M |
| Multiple component units | N |
| ARNG and USAR units | Q through Z |
| TDA units | Numeric |
| Active Component units | 0–6 |
| ARNG and USAR units | 7–9 |
| Mobilization TDA | 5 |
The final two characters indicate the Descriptive Designator. They describe the specifics characteristics of the unit. For example, the parent Battalion unit for the Army will use "AA." A child Company unit, such as A Company, will use "A0."