What Is a 10-22 Police Code? 10-22 Police Code

The 10-22 police code meaning for the police forces is Disregard or Cancel Last Message.

If you’ve ever listened to a police scanner or watched a crime drama, you might have heard the term 10-22 police code and wondered what it means. So, what is 10-22 police code exactly?

The 10-22 police code is a part of the standardized APCO Ten Codes, and it means “Disregard” or “Cancel the last message.” This code is used by law enforcement officers to quickly and efficiently communicate that a previously issued order or request is no longer valid and should be ignored.

What Does 10-22 Mean in Police Code? Cancel the Last Transmission

When an officer uses 10-22, it’s essentially telling other units or dispatchers to disregard the previous communication. This could be due to new information coming to light, a change in circumstances, or simply because the earlier message was sent in error.

For example, if an officer calls for backup but then finds the situation is under control, they might radio in with “10-22,” letting the responding units know they can stand down. This keeps communication clear, reduces confusion, and prevents unnecessary deployment of resources.

History of the 10 Codes – Where the 10-22 Police Code Comes From

The 10-22 code is one of the many shorthand signals developed in the 1930s by the Association of Public-Safety Communications Officials (APCO). These codes, commonly referred to as the APCO Ten Signals, were introduced in 1937 to simplify and standardize police communication over radio systems. This system helped overcome the limitations of early radio technology by keeping transmissions short, clear, and universally understood across departments.

Why the 10-22 Police Code Still Matters Today

Even though some agencies have moved toward using plain language instead of 10-codes for broader interoperability and public transparency, many departments still rely on traditional ten signals like the 10-22 police code. Its brevity and clarity are invaluable, especially during emergencies or fast-paced operations.

What Is 10-22 Police Code?

The 10-22 police code stands for “Disregard” or “Cancel last message”. It’s a vital part of law enforcement communication, helping officers and dispatchers relay changes or corrections quickly and efficiently. Whether you’re a police enthusiast, studying criminal justice, or simply curious, understanding what 10-22 means in police code provides valuable insight into how public safety agencies operate.

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Your Ultimate Guide to Police Codes – Explore the Meaning of 10-22 and More

Welcome to All Police Codes – your most trusted and comprehensive online resource for police codes and radio signals used by law enforcement agencies across the United States. Whether you’re looking to understand what the 10-22 police code means or explore the full list of police 10-codes and signals, you’ve come to the right place.

Our dedicated team is passionate about demystifying the language of law enforcement. We’ve spent years researching and compiling detailed information about police communication codes to help you learn, understand, and stay informed. From the meaning of individual police radio codes like 10-22 (“Disregard last transmission”), to the broader history and development of the 10-code system, we cover it all.

What is the 10-22 Police Code?

The 10-22 code is a common law enforcement signal that means “Disregard the last message”. Officers and emergency responders use this code to cancel or correct a previous transmission, ensuring clarity and efficiency during operations. It is one of the most frequently used codes in real-time communication by police departments, sheriff’s offices, and other emergency services nationwide.

With a police scanner, you can listen in and better understand how codes like 10-22 are used in actual field communication. Police scanners are popular tools for hobbyists, journalists, and those who want to stay aware of local public safety activities.

Why Police Codes Matter

Police codes are essential for fast, clear, and effective communication. They save time, reduce confusion, and allow emergency responders to communicate vital information quickly during high-pressure situations. These codes help dispatchers and officers streamline communication and coordinate their responses more efficiently.

Our extensive collection of police radio codes, including 10-codes, 11-codes, and more, gives you the tools to learn the language used daily by police and emergency services across the country.

The History of Police 10-Codes

Police codes, including the widely recognized 10-codes, were first developed between 1937 and 1940. The system was later expanded in 1974 by the Association of Public-Safety Communications Officials-International (APCO), which is the leading authority in public safety communications.

Interestingly, APCO originally proposed a version of brevity codes for Morse code in 1935, adapting them from U.S. Navy communication protocols. These early codes laid the foundation for the voice radio codes in use today.

Some of the most iconic police codes include:

10-4 – Acknowledgement (affirmative)
10-7 – Out of service
10-42 – Officer ending tour of duty

These codes are still in use today by thousands of departments and agencies, creating a standardized language that transcends regional differences.

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At All Police Codes, we created this site out of genuine admiration for law enforcement and emergency services. We believe that sharing this knowledge can bridge the gap between the public and the professionals who protect and serve every day.

All the information on our website is 100% free for personal and educational use. To help support our operational and hosting costs, we include advertising – but rest assured, our mission remains centered on providing accurate, accessible, and up-to-date police code information for all users.

Explore More Police Codes

Our website is constantly being updated with new content, explanations, and historical context around police radio codes and emergency communication systems. Whether you’re a student, journalist, first responder, or simply curious about what your local police are saying over the scanner – we’ve got you covered.

Start your journey today and dive into the world of police codes. Learn what each code means, how they’re used, and why they’re vital to emergency operations across America.

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