CIA Langley

United States Central Intelligence Agency, Langley Virginia, USA

GCHQ Cheltenham

Government Communications Headquarters, Cheltenham, UK

MI5 The Security Service

MI5 The Security Service, Thames House, London, UK

MI6 Secret Intelligence Service

MI6 Secret Intelligence Service, Millbank, London, UK

National Security Agency

National Security Agency, Ft Meade, Maryland, USA

Federal Bureau of Investigation

FBI, J Edgar Hoover Building, Washington DC, USA

FSB

Federal Security Service of the Russian Federation, Lubyanka Square, Russia

ASIS

Australian Secret Intelligence Service, R. G. Casey House

CSEC

Communications Security Establishment, Ottawa, Canada

Pentagon

The Pentagon, United States Department of Defense, Arlington, VA, USA

NRO

National Reconnaissance Office, Fairfax, VA, USA

BND

Bundesnachrichtendienst, Federal Intelligence Service, Berlin, Germany