The AT&T Madison Complex Tandem Office is a 17-story, building in Los Angeles, California, completed in 1961. With its microwave tower, used through 1993, bringing the overall height to , it is the 47th tallest building in Los Angeles. The building serves 1.3 million phone lines in area code 213, and other Los Angeles area codes, for foreign long-distance calling.
The site plays host to technology used in the NSA's Fairview surveillance program.New York Times, AT&T Helped U.S. Spy on Internet on a Vast Scale & Pro Publica, NSA Spying Relies on AT&T’s ‘Extreme Willingness to Help’, August 15, 2015.
See also List of tallest buildings in Los Angeles
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