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 29th 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. See also List of tallest buildings in Los Angeles References Further reading AT&T buildings Communication towers in the United States Skyscraper office buildings in Los Angeles Buildings and structures in Downtown Los Angeles Telephone exchange buildings Telecommunications buildings in the United States Office buildings completed in 1961 Towers completed in 1961 1961 establishments in California 1960s architecture in the United States