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Room 641A

Room 641A

Telecommunication interception facility.

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Readers' pathsAug 2026 – Oct 2026

Readers go next to

Share of the 13,806 clicks on its links

  1. Mark Klein

    American whistleblower (1945–2025).

    24%

  2. 33 Thomas Street

    Skyscraper in Manhattan, New York, US.

    9.9%

  3. AT&T

    American telecommunications company.

    8.1%

  4. Mass surveillance in the United States

    7.7%

  5. Utah Data Center

    NSA data storage facility.

    3.5%

  6. Cabinet noir

    Type of government intelligence gathering office.

    2.7%

  7. PRISM

    Mass surveillance program run by the NSA.

    2.5%

  8. Main Core

    Alleged American government database.

    2.5%

  9. Beam splitter

    Optical device which splits a beam of light in two.

    2%

  10. ECHELON

    Signals intelligence collection and analysis network.

    1.9%

Readers come from

Share of the 4,208 readers arriving from another article

  1. Mark Klein

    American whistleblower (1945–2025).

    21%

  2. Snowden disclosures

    Disclosures of NSA and related global espionage.

    11%

  3. Fairview (surveillance program)

    Domestic spying partnership between AT&T and the NSA.

    8.2%

  4. PRISM

    Mass surveillance program run by the NSA.

    5%

  5. Fiber tapping

    Extraction of a signal from an optical fiber.

    3.4%

  6. AT&T

    American telecommunications company.

    2.9%

  7. List of government mass surveillance projects

    2.6%

  8. Crypto-anarchy

    Political ideology.

    1.9%

  9. Jewel v. National Security Agency

    US 9th Circuit Court of Appeals case (2011).

    1.8%

  10. MAINWAY

    NSA database of US telephone calls.

    1.4%