Site: AT&T Switching Center Los Angeles

Company: AT&T
Metro: Los Angeles
State: California
Country: United States
Region: North America
Region: Americas
Region: World

The AT&T Switching Center, formerly known as the "AT&T Madison Complex Tandem Office", is one of the largest telephone central offices in the nation.

The building is actually made up of three adjoining buildings built during different years as load growth warranted. The original building has been destroyed, but was built on the same site in the 1900s as part of the Home Telephone Company. During 1907 this office had the capacity of 10,000 lines, quite a difference from today. Two new offices were built at the site in 1925, the second office was enlarged in 1945 to allow for load growth. The third office was constructed in 1961 and is 17 stories tall. Source:

AT&T Tower Names

As the telecom industry went through changes so have the building's name.

  • AT&T Madison Complex Tandem Office
  • AT&T Switching Station
  • SBC Tower
  • Pacific Bell Tower
  • Pacific Telephone Tower

Map and Nearby Locations:

420 South Grand Avenue, Los Angeles, California 90071

SITES within 15 miles of AT&T Switching Center Los Angeles

Show SqM

Distance Site name SqFt MW
0.18 miles QuadraNet Los Angeles 530
0.18 miles United Layer-LA4 3,000 0.60
0.18 miles Colocation America (LA4) 10,000 0.50
0.18 miles Sprocket Los Angeles
0.18 miles Cogent Los Angeles (530 West 6th) 8,400
0.18 miles ColoCrossing LA1 50,000
0.18 miles Wilcon 530 West 6th 3,200 3.00
0.18 miles Telecom Center LA Building (530 West 6th) 163,600
0.22 miles InfoRelay LAX1, LAX2, LAX3
0.23 miles Atlantic Metro-Los Angeles LAX0