At and T Washington Contact Customer Service Numbers Home» At» At and T Washington Call at +1 (202) 822-13501050 Connecticut Avenue Northwest Washington, District of Columbia 20036, United StatesDirections: Follow the directions to locate At and T Washington ContactLocations Near You: Find nearby locations of At and T Washington ContactCustomer Care Number: (724) 229-1541Additional Contact: (503) 598-9048Basic OverviewAT and T is reputed name in the telecommunication sector and is recognized as one of the premium American based telecommunication companies of the world that history's back on October 5 1983. The enterprise is based in Dallas, Texas and is counted among the largest landline and mobile telephone solution providers in the United States. It has extensive experience in providing satellite television, Broadband, Digital Television and network security product lines. The company operates and manages the huge number of subsidiaries.The American tel and Telegraph is simply admitted as At and T Corporation is America set-up telecommunication corporation which was made in 1885 and procured by the Bell Company on December 31, 1899. this renders number of assistance aforementioned as Mobile telephony, broadband, Fixed Line, Digital TV and much more. In September 2013, corporation was asserted to work with Carlos Slim’s America Movil to regulate in Latin America. this has number of subdivision like AT and T Mobility, AT and T Teleholdings, Southwestern Bell, Bellsouth and others.