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E10 – Mossad

Nickname: Mossad
Activity: Inactive since 2011
Emission Mode: AM or USB
Voice Summary: Automated woman’s voice accented with odd pronunciation when reading some words. Live read voice was reported in early years of its existence
Believed Country of Origin: Israel

Station Summary

E10 was one of the most unique numbers stations that existed, as it employed letters read in their NATO phonetic equivalents rather than basic numbers. The station was reported sometime in the 1960’s or 1970’s using live voice announcers before switching to an automated female voice.

E10 was reported to broadcast from Israel’s capital Tel Aviv and being of MOSSAD origin. Signals were noted to be intensely strong within the city. E10 transmitted in AM mode and were simulcast every hour several frequencies (possibly to avoid jamming attempts). 3 letter call signs for this station were numerous, sometimes with suffixes to determine the status of the message. “1” indicated the transmission was merely a test, and “2” indicated a null message.

E10 ceased shortwave operation in 2011. Its activity via other means is not entirely known, but it’s possible Mossad switched to satellite or digital.



E10a was a variant that sent numbers mixed together with the typical phonetic (sometimes in times of political crisis). Its most memorable transmission was sent 15 March 2006 at 2200z, sending a message to an agent “Kilo Papa Alpha” with the string G1O2O3D4N5I6G7H8T. Removing the numbers from it leaves the text ‘GOODNIGHT’.


ENIGMA Newsletter 15 (July 1998) Page 22