The NATO phonetic alphabet spells out letters using fixed code words — A is Alfa, B is Bravo, all the way to Z for Zulu — so that letters can never be confused when spoken over a radio or phone. Instead of saying “B” and “D” (which sound almost identical on a noisy line), you say “Bravo” and “Delta”. The full chart is below, and you can spell any word automatically with the NATO phonetic alphabet converter.
TL;DR
- Each letter has one code word: A=Alfa, B=Bravo, … Z=Zulu.
- It was standardized by the International Civil Aviation Organization (ICAO) and is used by NATO, aviation, the military, and emergency services.
- Two spellings are deliberate: Alfa (not Alpha) and Juliett (double t), so non-English speakers pronounce them correctly.
- Digits get their own clear pronunciations too: 3 is “Tree”, 5 is “Fife”, 9 is “Niner”.
Full NATO Phonetic Alphabet Chart (A–Z)
The stressed syllable is shown in capitals in the pronunciation column, following the official ICAO guidance.
| Letter | Code word | Pronunciation |
|---|---|---|
| A | Alfa | AL-fah |
| B | Bravo | BRAH-voh |
| C | Charlie | CHAR-lee |
| D | Delta | DELL-tah |
| E | Echo | ECK-oh |
| F | Foxtrot | FOKS-trot |
| G | Golf | GOLF |
| H | Hotel | hoh-TELL |
| I | India | IN-dee-ah |
| J | Juliett | JEW-lee-ETT |
| K | Kilo | KEY-loh |
| L | Lima | LEE-mah |
| M | Mike | MIKE |
| N | November | no-VEM-ber |
| O | Oscar | OSS-cah |
| P | Papa | pah-PAH |
| Q | Quebec | keh-BECK |
| R | Romeo | ROW-me-oh |
| S | Sierra | see-AIR-rah |
| T | Tango | TANG-go |
| U | Uniform | YOU-nee-form |
| V | Victor | VIK-tah |
| W | Whiskey | WISS-key |
| X | X-ray | ECKS-ray |
| Y | Yankee | YANG-key |
| Z | Zulu | ZOO-loo |
Numbers and Common Signals
Numbers are spoken digit by digit with a few altered pronunciations so they survive a bad connection. “Niner” is used for 9 because “nine” can sound like the German “nein”.
| Digit | Word | Pronunciation |
|---|---|---|
| 0 | Zero | ZEE-ro |
| 1 | One | WUN |
| 2 | Two | TOO |
| 3 | Three | TREE |
| 4 | Four | FOW-er |
| 5 | Five | FIFE |
| 6 | Six | SIX |
| 7 | Seven | SEV-en |
| 8 | Eight | AIT |
| 9 | Nine | NIN-er |
Why It Exists
Radio and telephone audio drops high frequencies and adds noise, which makes many letters sound alike: B/D/E/G/P/T/V/Z all share a similar vowel, and F/S/X blur together. Spelling with distinct multi-syllable words removes that ambiguity. The alphabet was refined through the 1950s and adopted by ICAO for civil aviation; NATO, the U.S. military, and many police and emergency services use the same set. Because it is a single agreed standard, a pilot in one country and a controller in another spell names the same way.
How to Use It
To spell a word, replace each letter with its code word. For a mixed string, read letters as code words and numbers digit by digit.
- Name “Kim” → Kilo · India · Mike.
- Booking code “B7X” → Bravo · Seven · X-ray.
- “SOS” → Sierra · Oscar · Sierra (note: the Morse distress signal SOS is separate — see the Morse code tool).
Common Mix-ups
- Alfa vs Alpha. The official spelling is Alfa. “Ph” is not read as an “f” sound in every language, so ICAO uses “f” directly.
- Juliett with two t’s. French speakers would treat a single final “t” as silent, so the standard doubles it.
- X-ray is written with a hyphen and read as two syllables.
- This is a spelling alphabet, not a cipher — it hides nothing, it just makes letters unambiguous. For actual encoding, try the Morse code or binary tools.
FAQ
Is it “NATO” or “ICAO” alphabet?
Both names refer to the same 26 code words. ICAO standardized it for aviation; NATO adopted it, and the “NATO phonetic alphabet” name stuck in everyday use.
Why say “Niner” for 9?
To keep it distinct from “nein” and from “five” on a noisy channel.
Can I use it to encrypt a message?
No. It only makes spoken letters clear. Anyone who hears “Bravo” knows it means B.
What about accents and stress?
ICAO publishes recommended pronunciations (shown above); minor regional variation is normal and still understood.
The point of a spelling alphabet is not secrecy but survivability: every code word is chosen so that even half of it, heard through static, still identifies one letter and only one letter.
Spell any word instantly with the NATO phonetic alphabet converter, or browse more encoding tools in the full tools list and guides on the cryptography blog.