what does 10-4 mean

Mon, 04 May 2026 16:00:48 +0000

# What Does 10-4 Mean? Understanding the Origins and Usage of This Key Commissions Code In radio communications, particularly within law enforcement, emergency services, and military operations, specific numerical codes serve as shorthand to convey critical information quickly and accurately. One such phrase is “10-4”, a term that has become deeply embedded in communication jargon. But what does 10-4 really mean, and where does it come from? ## The Meaning of 10-4 At its core, “10-4” expresses confirmation—it means “received” or “understood.” When a dispatcher, operator, or team member replies “10-4,” they are confirming that they have received and acknowledged the message or instruction without delay. It’s a clear signal that the communication is registered and readiness to act has been established.