In-Depth Analysis

National Security Demands

National Security Letters (NSL) are administrative subpoenas issued by the U.S. Federal Bureau of Investigation to compel production of information in regard to counterterrorism or counterintelligence investigations. NSLs are limited to non-content information, such as a list of phone numbers dialed or subscriber information. Legal demands issued pursuant to the Foreign Intelligence Surveillance Act (FISA) may direct us to provide content and non-content data related to national security investigations, such as international terrorism or espionage.

Our reporting on NSLs and FISA orders (collectively referred to as “National Security Demands”) is governed by U.S. law.1 By statute, we are permitted to report data of demands served on us and the “customer selectors targeted” by those respective demands in specifically defined numeric ranges and for only certain time periods.


1See 50 U.S.C. § 1874, as added by the USA Freedom Act (Public Law 114-23 of June 2, 2015)

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