On-line numbers database

Asian Broadcasting Institute

Chris Smolinski's Spy Center

Conet Project

Cuban HM01 page + DIGTRX decoder

Der Deutsche Freiheitssender 904 (DFS 904)

Dirk Rijmenants' Number page

Don Schimmel's Radio Intrigue


HF Underground

Hugh Stegman's site

M51a FAV22

Mystery Signals of the Short Wave

Now on the radio (includes Asian numbers stations)

Numbers @

Numbers on Wikipedia

Peter's Youtube channel


Signal Intelligence Group

Surfing the Radio Waves

Telephone trips

Tomonori Izumi's BBS

Westli's V13 (New Star) pages


AIVD - Dutch intelligence

British Foreign and Commonwealth Office

Canadian Communications Security Establishment

Central Intelligence Agency

Centro Nacional de Inteligencia (Spain)

CTIVD - Dutch Intelligence Commission

DGSE French Intelligence

Drug Enforcement Administration

Federal Bureau of Investigation

Federal Security Service (FSB)

GCHQ - UK Government Comms HQ

German Bundesamt fuer Verfassungsschutz

Gov. Communications Security Bureau

MIVD - Dutch Military Intelligence

National Reconnaissance Office

Russian Foreign Intelligence Service (SVR)

Security Intelligence Review Committee

U.N. Crime & Justice Information Network

Wikipedia List of Intelligence Agencies


A Cryptographic Compendium

Alan Turing home page

Bletchley Park

Bob Lord's Crypto Museum

Code Groups

Crypto Museum

Cypher machines & Cryptology

Decode Systems

Enigma Museum

Foundation for German communication and related technologies

Frode Weierud's cryptography page

Jerry Proc: Crypto Machines

One-Time Pad Generators

Secret Code Breakers books

The Enigma and the bombe


898 Verbindingsbataljon RadioCie


American Foreign Policy Council

CIA Freedom of Information Database

Cold War Vaults

Crime Museum


Der SAS- und Chiffrierdienst

Encyclopedia of Espionage, Intelligence, and Security

Espionage History Archive

Eye Spy Magazine

FBI FOIA Library

Federation of American Scientists

Global Security

Governments on the WWW

Intelligence 101

Intelligence Tread Handbook

International Spy Museum

Kiev woodpecker pictures (1)

Kiev woodpecker pictures (2)

Library of Congress Country Studies

National Security Archive

NSA / CSS Library

Psy Warrior

Secret Bases

Sozvezdie. Manufacturer of the Serdolik System

Spylopedia - the Internet Spy encyclopedia


U.K. National Archives

U.S. Clandestine Radio Equipment

U.S. National Archives

U.S.S. Liberty Memorial page

Virtual Library Regional Studies