Police Phonetic Alphabet: APCO Codes vs NATO Explained
The police phonetic alphabet is the APCO spelling alphabet that many US police departments use on the radio: Adam, Boy, Charles, David and so on. It does the same job as the NATO alphabet, making letters easy to hear, but it uses everyday first names and words. Some agencies use APCO, others have switched to NATO, and many officers know both.
- The classic US police alphabet is the APCO list: Adam, Boy, Charles, David, Edward, Frank, George, Henry, Ida, John and so on.
- APCO stands for the Association of Public-Safety Communications Officials.
- The NATO alphabet (Alfa, Bravo, Charlie) is the international standard, and many police forces now use it.
- Exact word lists vary between departments, so local usage can differ.
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Police Phonetic Alphabet Chart: APCO vs NATO
Here is the APCO police alphabet next to the NATO version. Several letters are the same in both lists, such as Victor, William/Whiskey and X-ray. However, most differ, so it pays to know which one your agency expects.
| Letter | APCO Police Word | NATO Word |
|---|---|---|
| A | Adam | Alfa (Alpha) |
| B | Boy | Bravo |
| C | Charles | Charlie |
| D | David | Delta |
| E | Edward | Echo |
| F | Frank | Foxtrot |
| G | George | Golf |
| H | Henry | Hotel |
| I | Ida | India |
| J | John | Juliett (Juliet) |
| K | King | Kilo |
| L | Lincoln | Lima |
| M | Mary | Mike |
| N | Nora | November |
| O | Ocean | Oscar |
| P | Paul | Papa |
| Q | Queen | Quebec |
| R | Robert | Romeo |
| S | Sam | Sierra |
| T | Tom | Tango |
| U | Union | Uniform |
| V | Victor | Victor |
| W | William | Whiskey |
| X | X-ray | X-ray |
| Y | Young | Yankee |
| Z | Zebra | Zulu |
Keep in mind that this is the commonly cited APCO list. In practice, some departments swap in their own words, such as “Baker” for B or “Oscar” in place of “Ocean” for O. If you work in dispatch or law enforcement, always check your local radio manual.
What Is APCO and Where Did the Police Alphabet Come From?
APCO is the Association of Public-Safety Communications Officials, a US organization founded by police radio professionals. It published its spelling alphabet to give officers a standard way to spell over early police radio. As a result, the list spread to departments across the country.
The words reflect their era and audience. Common American first names, such as Henry, Mary and Robert, were easy for English-speaking officers to recognize. In contrast, the NATO alphabet was built for international use, so it mixes names, places and other words that work across languages.
You may also hear the APCO list called the “LAPD alphabet”. That nickname comes mostly from TV and film, where Los Angeles police shows made “Adam” and “Boy” familiar to the public. Still, the list itself was never limited to one city.
Why Some Police Still Use the APCO Alphabet
If NATO is the world standard, why hasn’t every department switched? There are a few practical reasons:
- Habit and training. Officers and dispatchers who learned APCO years ago can use it without thinking.
- Local systems. Some unit call signs and procedures are built around APCO words, such as “1-Adam-12” style designations.
- Clarity for English speakers. First names are familiar and easy to say for most US officers.
On the other hand, more agencies now lean toward NATO. Because fire services, the military and federal partners often use it, a shared alphabet makes joint operations smoother. For that reason, you’ll find a mix across the United States, and some forces accept both.
Police outside the United States
In the UK, Canada, Australia and much of Europe, police generally use the NATO alphabet for English-language radio traffic. Some countries also have national spelling lists in their own language. Our guide to the British phonetic alphabet covers UK usage in more depth.
How Police Use the Phonetic Alphabet
Officers spell things out many times a shift. The alphabet helps most when a single wrong character could send the wrong car, or the wrong person, into a database check.
License plates
Plate checks are the classic example. A plate such as “7KDM218” could easily be misheard. With APCO words, it becomes “Seven, King, David, Mary, Two, One, Eight”. With NATO, it becomes “Seven, Kilo, Delta, Mike, Two, One, Eight”. Either way, the dispatcher gets the exact plate.
Names and addresses
Next, officers spell surnames, street names and dates of birth when running checks. Unusual names benefit most, because the dispatcher may never have heard them before. For example, “Nguyen” becomes “Nora, George, Union, Young, Edward, Nora” in APCO.
Unit call signs
Finally, many departments build unit call signs from a number, a letter word and another number. The letter word often tells the dispatcher what kind of unit it is. However, these systems vary a lot from one agency to the next.
Police Phonetic Alphabet and 10-Codes
Police radio also uses codes, and the best-known are 10-codes, such as “10-4” for “message received”. APCO helped popularize these codes too. They kept transmissions short in the days of crowded, low-quality radio channels.
That said, 10-codes vary widely between agencies, and the same code can mean different things in different places. As a result, US emergency management guidance has pushed for plain English during multi-agency incidents. Many departments now combine plain language with a phonetic alphabet for spelling. Our page on radio prowords covers the standard words used across radio services.
Tip: If you call the police or a dispatcher as a member of the public, use the NATO words. Every trained operator will understand them, whichever alphabet their agency uses on the radio.
Learning the Police Phonetic Alphabet
If you’re joining a department, ask which alphabet it uses before you start memorizing. Then learn the words in small groups and practice on real plates you see each day. Because APCO and NATO share some words, learning one makes the other easier.
For the NATO side, our NATO phonetic alphabet chart has pronunciation and Morse for every letter. You can also try the phonetic alphabet translator to spell plates and names instantly, and test yourself with the phonetic alphabet quiz. To compare an even older list, see the WW2 phonetic alphabet, which shares several words with APCO.
The Bottom Line
The police phonetic alphabet usually means the APCO list, from Adam to Zebra. It remains common in US policing, although many agencies have moved to the NATO standard. Knowing both lists, and checking your local rules, is the safest approach. For official background, visit APCO International.
Frequently Asked Questions
What is the police phonetic alphabet?
It usually refers to the APCO alphabet used by many US police departments. It starts Adam, Boy, Charles, David, Edward. Like the NATO alphabet, it helps officers spell letters clearly over the radio.
Do police use the NATO phonetic alphabet?
Many do. Most police outside the US use NATO words, and a growing number of US agencies do too. Others still use APCO, so practice varies by department.
Why is it called the LAPD alphabet?
The nickname comes largely from TV and film set in Los Angeles, where the APCO words became familiar to viewers. The list itself was used by many departments, not just the LAPD. Its proper name is the APCO alphabet.
What does Adam Boy Charles mean?
Adam, Boy and Charles are the APCO police words for A, B and C. An officer might say them when spelling a name or a license plate. In the NATO alphabet, the same letters are Alfa, Bravo and Charlie.
What does 10-4 mean on police radio?
10-4 generally means message received or understood. It is one of the 10-codes popularized by APCO. Meanings of other 10-codes vary between agencies, which is why many now prefer plain language.