“FBI codes” can refer to several systems, including the 10-codes used by law enforcement for radio communication (e.g., 10-8 for “in service”), NIBRS (National Incident-Based Reporting System) offense codes that classify crimes (e.g., 9A for murder), and fingerprint reason codes that indicate the purpose of a fingerprint submission (e.g., for a specific state-level license). 

10-codes (radio communication) 

These are a set of abbreviations used to simplify and speed up radio communication between law enforcement officers. 

• 10-8: In service / available for assignment 
• 10-9: Repeat last transmission 
• 10-10: Off duty 
• 10-15: Prisoner in custody 
• 10-16: Pick up prisoner 

NIBRS (National Incident-Based Reporting System) offense codes 

These codes are used to classify specific criminal offenses for data collection. 

• 09A: Murder & Nonnegligent Manslaughter 
• 26A: False Pretenses/Swindle/Confidence Game 
• 39A: Betting/Wagering 

Fingerprint reason codes 

These codes are used to specify the reason for a background check or fingerprint-based identification. They are often specific to state agencies or federal programs. 

• 1KG71B: Foster Parent (example from Elizabethtown College) 
• 1KG72V: Prospective Adoptive Parent (example from Elizabethtown College) 
• 3319 39: School Employees (Ohio specific) 
• 3772 07: Ohio Lottery Commission (Ohio specific) 

Other FBI codes 

• FBI Number: A unique identification number linked to an individual’s biometric data, especially fingerprints, and stored in the FBI’s database. 
• NIBRS Classifications: The FBI’s official website lists many different classes of records and codes used internally for classification and data management purposes