NSA Call Database

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High Quality Content by WIKIPEDIA articles! The NSA call database is a database created by the United States National Security Agency (NSA) that contains hundreds of billions of records of telephone calls made by U.S. citizens from the four largest telephone carriers in the United States: AT&T, SBC, BellSouth (all three now being called AT&T since AT&T bought BellSouth and SBC purchased AT&T but kept the AT&T name), and Verizon. The existence of this database and the NSA program that compiled it was unknown to the general public until USA Today broke the story on May 10, 2006. It is estimated that the database contains over 1.9 trillion call-detail records. According to Bloomberg News, the effort began approximately seven months before the September 11, 2001 attacks. The records include detailed call information (caller, receiver, date/time of call, length of call, etc) for use in traffic analysis and social network analysis, but do not include audio information or transcripts of the content of the phone calls.