Ever wondered why people ask, ‘What’s your 20?’ Here is the interesting reason

For example:

•  10-4 = Message received / understood
• 10-7 = Out of service
• 10-9 = Repeat message
• 10-20 = Location

Over time, “What’s your 20?” became one of the most recognisable phrases from this system.

 

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How is it used today?

Even outside police and radio communication, the phrase is now used casually.

Friends may text: “Hey, what’s your 20?”
Meaning: Where are you right now?

Or someone might say: “We’re all here. What’s your 20?” Meaning: Tell us your location so we know where you are. It’s often used in a playful or informal tone, especially among people familiar with American slang, movies, or police dramas.

Why did it become popular?

• Television shows, crime dramas, trucking culture, and CB radio popularity in the 1970s helped bring the phrase into mainstream language.
• Movies and series featuring police officers often used radio codes, making phrases like “10-4” and “What’s your 20?” widely recognized even by people who were never part of that world.
• Today, social media and texting culture have kept the phrase alive, especially because it sounds cooler and shorter than simply saying “Where are you?”

Should you use it?

Yes, if the context is casual and the other person understands the phrase. It works best in informal chats, friendly banter, or pop-culture-heavy conversations. In formal settings, simply asking “Where are you?” is clearer.

Still, “What’s your 20?” remains one of those phrases that adds personality to everyday conversation while carrying a bit of old-school radio history. From police radios to WhatsApp texts, this phrase proves that language often travels far beyond where it started.