10-4 Police Code Meaning & Definition

What Does 10-4 Mean?

10-4 is a police radio code most commonly used to mean Message Received.

Police departments and dispatch centers may use 10-4 differently, but Message Received is the most common meaning found in our database of agencies across the United States.

Most Common Meaning: Message Received

Used this way by: 70% of agencies on this page
Used in: 23 agencies across 15 states
Category: Communication
Consensus: MediumMost agencies use this code similarly, but some regional or agency variations exist.

Code Distribution Breakdown

Message Received: 70% (16 agencies)
Two Officer Unit: 4% (1 agency)
Motor Pool Request: 4% (1 agency)
Cancel Call: 4% (1 agency)
Affirmative: 4% (1 agency)
Property Damage Accident: 4% (1 agency)
Affirmative (OK): 4% (1 agency)
OK: 4% (1 agency)

10-4 Police Code Meanings by Agency

23 agencies across 15 states
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Arizona
Agency Phoenix Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Arizona
Agency Tucson Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State California
Agency Orange County Sheriff's Office
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State California
Agency San Bernardino Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State California
Agency San Diego Police Department
Sources
10-4: Two Officer Unit
CategoryStatus
State Washington DC
Agency Washington DC Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Florida
Agency Hillsborough County Sheriff's Office
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Florida
Agency Jacksonville Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Florida
Agency Lake County Sheriff's Office
Sources
10-4: Motor Pool Request
CategoryAdministrative
State Florida
Agency Miami-Dade Sheriff's Office
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Florida
Agency Palm Beach County Sheriff's Office
Sources
10-4: Cancel Call
CategoryCommunication
State Georgia
Agency Atlanta Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Illinois
Agency Chicago Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Massachusetts
Agency Boston Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Maryland
Agency Baltimore Police Department
Sources
10-4: Affirmative
CategoryCommunication
State North Carolina
Agency Winston-Salem Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Nevada
Agency Albuquerque Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State New York
Agency New York Police Department
Sources
10-4: Property Damage Accident
CategoryIncident
State Ohio
Agency Columbus Police Department
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Texas
Agency San Antonio Police Department
Sources
10-4: Affirmative (OK)
CategoryCommunication
State Virginia
Agency Richmond Police Department
Sources
10-4: OK
CategoryCommunication
State Virginia
Agency Virginia State Police
Sources
10-4: Message Received
Used to acknowledge that a message or transmission was received and understood.
CategoryCommunication
State Washington
Agency Seattle Police Department
Sources

Why Does 10-4 Have Different Meanings?

Police radio codes are not standardized nationwide. Different agencies may assign different meanings to 10-4 , which is why multiple definitions can exist for the same code.

View all police codes