AT&T Switching Center Los Angeles

420 South Grand Avenue

Operated by:

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

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Distance Site About
0.18 miles QuadraNet Los Angeles 530
0.18 miles Colocation America (LA4)
0.18 miles United Layer-LA4
0.18 miles Telecom Center LA Building (530 West 6th)
0.18 miles Sprocket Los Angeles
0.18 miles Cogent: 530 West 6th
0.18 miles Wilcon 530 West 6th
0.18 miles ColoCrossing LA1
0.22 miles DataBank LAX1
0.22 miles InfoRelay LAX1, LAX2, LAX3
0.23 miles Atlantic Metro-Los Angeles LAX0
0.23 miles One Wilshire Building
One Wilshire is an iconic building in downtown Los Angeles. The 30 story building is easy to spot on the LA skyline with a giant "One Wilshire" sign at the top of the building.
0.23 miles Crown Castle LA
0.23 miles CoreSite Los Angeles (LA1) One Wilshire
CoreSite's Any2 IXP (Peering Exchange) is the largest public IXP in the Western United States. The Unity Trans-Pacific submarine cable, also lands in the building, which provides undersea connectivity to Asia.
0.23 miles US Colo (One Wilshire)
0.23 miles Aon Center
0.26 miles Telehouse 626 Wilshire
0.27 miles US Colo (Quinby)
0.28 miles Wilcon 607 West 7th
0.31 miles Equinix Los Angeles LA1
0.32 miles Aptum Los Angeles
0.32 miles AT&T Los Angeles 2
0.32 miles 600 W 7th St, Los Angeles - Digital Realty
The 7-story building at 600 West 7th is one of the best-connected buildings in Los Angeles (second to One Wilshire.) Digital Realty operates the building's Meet Me Room and offers connections into Equinix LA1 space.
0.32 miles ANEXIO LAX6
The data center is in suite 550 and the office is in suite 560
0.32 miles China Telecom Los Angeles
0.32 miles XO: (600 West 7th)
0.33 miles VPLS LA2
0.37 miles Lumen Los Angeles 1
0.37 miles XO: (818 West 7th)
0.37 miles Equinix Los Angeles LA2
0.37 miles 818 West 7th
0.45 miles 800 South Hope
0.45 miles US Colo (800 Hope)
0.45 miles NYI Los Angeles
0.73 miles VPLS LA1
0.74 miles ANEXIO LAX1
0.74 miles West 7 Center (1200 West 7th)
0.74 miles Alchemy Downtown
0.74 miles Equinix Los Angeles LA5
1.15 miles Fiberhub LAX1
1.16 miles ARP Networks
1.16 miles CoreSite Los Angeles (LA2) 900 N Alameda
CoreSite's LA2 facility at 900 N Alameda is an elegant building that was built in 1940 as a Postal Annex. It was the central mail processing facility for Los Angeles until 1989. The site is now owned by CoreSite and is being incrementally converted to data center space.
1.16 miles Tata Los Angeles
1.19 miles CoreSite LA3
3.49 miles Prime Vernon
9.75 miles 2301 West 120th, Hawthorne
10.81 miles Alchemy LAX
10.81 miles QuadraNet LAX (Century)
11.53 miles 3015 Winona - Digital Realty
11.53 miles Cyxtera Burbank BR1
2 Story Structure Utility: Burbank Water and Power
11.65 miles Equinix El Segundo LA4
11.71 miles Serverfarm LAX1
The site is served by a 16.5 MW substation on-site.
11.79 miles Equinix El Segundo LA3
11.93 miles Cyxtera El Segundo LA1
11.93 miles 200 North Nash - Digital Realty
200 Nash is fully leased to Cyxtera, a Triple Net tenant
11.94 miles 2260 E El Segundo - Digital Realty
In 2010, DRT acquired this site from 365 Main. The transaction included 4 other data centers and was for a total of $725 Million
11.94 miles ANEXIO LAX4- El Segundo
Located within the DRT building in El Sengundo
12.45 miles Cogent Pasadena
13.00 miles Evocative Redondo LAX14
INAP's flagship location in Los Angeles Datacenter was constructed in 2012 Electric Utility Provider: Southern California Edison
14.11 miles Equinix Los Angeles LA7
17.55 miles Cogent: 16680 Valley View

AT&T Switching Center Los Angeles Data Center Photos

Operating Company

13 Facilities Owned
32 Markets Served
9.5 Megawatts
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