AT&T Switching Center
|AT&T Madison Complex Tandem Office|
|Alternative names||AT&T Switching Center|
Pacific Telephone Tower
SBC Communications Switching Station
|Location||420 South Grand Avenue|
Los Angeles, California
|Antenna spire||136.55 m (448.0 ft)|
|Roof||79 m (259 ft)|
|Design and construction|
|Architect||John B. Parkinson |
Donald D. Parkinson
The AT&T Madison Complex Tandem Office is a 17-story, 79 m (259 ft) building in Los Angeles, California, completed in 1961. With its microwave tower, used through 1993, bringing the overall height to 137 m (449 ft), 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.
- "Los Angeles Central Offices Madison Complex". The Central Office. 14 March 2009. Archived from the original on 3 September 2010. Retrieved 3 September 2010.
- "AT&T Tower, Los Angeles, California". Southland Architecture. 2010. Retrieved 3 September 2010.
- Gallagher, Ryan; Moltke, Henrik (June 25, 2018). "The NSA's Hidden Spy Hubs in Eight U.S. Cities". The Intercept.