The reference desk — standardized codes, filed & searchableN° 2,372 entries · 11 collections ·
DirectoryCodes
The directory of the world’s codes

Front desk · NATO Phonetic Alphabet

ICAO spelling alphabet

0 Zero

In the NATO/ICAO spelling alphabet, 0 is spoken as “Zero”. Its Morse code is −−−−−.

The code words were chosen so no two sound alike over bad radio — which is why pilots, sailors, and call-center agents all spell with the same 26 words, unchanged since 1956.