If you’ve ever watched a crime drama or listened to truckers on a CB radio, you’ve likely heard the question, “What’s your 20?” Instantly recognizable, it means “What is your location?” But its journey from police code to pop culture catchphrase is a fascinating story of communication evolution.
The phrase owes its existence to the APCO Ten-Code system, developed by the Associated Public-Safety Communications Officers in the 1930s. In an era of limited radio bandwidth and often-poor audio quality, police and emergency responders needed a concise, clear, and standardized way to communicate. The Ten-Codes substituted short numbers for common phrases. Among them, “10-20” was designated specifically for “location.”
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The exact reason “20” was chosen for location is lost to history. Some speculate it relates to the old “10-20” (or “10-20 minutes”) report system used by railway workers, while others believe it was simply an arbitrary, easy-to-understand number in a long list of codes. Regardless, “10-20” became ubiquitous in law enforcement, allowing an officer to quickly ask for or report a position with minimal airtime and maximal clarity. The natural evolution into the colloquial “What’s your 20?” was inevitable.
The phrase truly exploded into the public consciousness in the 1970s, thanks largely to the CB radio craze and Hollywood. As everyday citizens, especially truckers, adopted Citizens Band radios for communication and traffic updates, they borrowed the ten-code lingo from police scanners. The 1975 novelty song “Convoy” by C.W. McCall cemented terms like “10-4” (acknowledged) and “What’s your 20?” in the national lexicon. Soon after, television shows like CHiPs and movies like Smokey and the Bandit reinforced the phrase as a cool, insider way to ask where someone was.
Today, “What’s your 20?” has transcended its radio origins. While still used in some public safety contexts, its primary function is now cultural. It serves as a piece of nostalgic slang, a knowing reference for film and TV buffs, and a functional, slightly playful alternative to “Where are you?” in texts or calls. It evokes imagery of open highways, crackling radios, and a bygone era of analog communication.
Ultimately, “What’s your 20?” is more than just a code. It’s a linguistic fossil, preserved from a time when communication was a craft requiring precision and brevity. Its survival is a testament to its perfect design and the enduring human desire for a quick, clear, and cool way to find our people. So next time you use it, you’re not just asking for a location—you’re tapping into a rich history of wireless communication. 10-4?
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