At & T

525 Market St
San Francisco CA 94105
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AT&T is one of the one of the world's leading providers of IP-based communications services to business firms. It also has the United State's one of the fastest mobile broadband network and the largest international coverage of any U.S. wireless carrier. The company serves millions of small business customers nationwide with a portfolio of communications services, such as telephones, Internet access, laptops, hand-held devices and Wi-Fi services. AT&T provides its enterprise business customers with a single source for local, national, global and wireless voice and data services. It is a recipient of the Fortune magazine's award for the World's Most Admired Telecommunications Company in 2009.