Coba jelasin Hong Kong (since closed) dari Echelon dong

Australian Defence Satellite Communications Station (Geraldton, Western Australia)

Menwith Hill (Yorkshire, UK) Map

GCHQ Bude, formerly known as GCHQ CSO Morwenstow, (Cornwall, UK) Map

Pine Gap (Northern Territory, Australia - close to Alice Springs) Map

Sugar Grove (West Virginia, US) Map

Yakima Training Center (Washington, US) Map

Stasiun berikut tercantum dalam laporan Parlemen Eropa (p. 57 ff) sebagai peranannya belum jelas:

Ayios Nikolaos (Cyprus - UK)

Bad Aibling Station (Bad Aibling, Germany - US) - moved to Griesheim in 2004

Buckley Air Force Base (Aurora, Colorado, US)

Leitrim (south of Ottawa, Ontario, Canada)

Lackland Air Force Base, Medina Annex (San Antonio, Texas, US)

Onyx (interception system), setara "Echelon" di Swiss

Bamford, James; The Puzzle Palace, Penguin, ISBN 0-14-006748-5; 1983

Hager, Nicky; Secret Power, New Zealand's Role in the International Spy Network; Craig Potton Publishing, Nelson, NZ; ISBN 0-908802-35-8; 1996

Bamford, James; Body of Secrets: Anatomy of the Ultra-Secret National Security Agency , Anchor, ISBN 0-385-49908-6; 2002

Keefe, Patrick Radden Chatter: dispatches from the secret world of global eavesdropping; Random House Publishing, New York, NY; ISBN 1-4000-6034-6; 2005

Bamford, James; The Shadow Factory: The Ultra-Secret NSA from 9/11 to the Eavesdropping on America, Doubleday, ISBN 0-385-52132-4; 2008