AT&T Inc. is a prominent American multinational telecommunications company, founded in 1875 by Alexander Graham Bell. Headquartered in Dallas, Texas, it ranks as the third largest telecommunications company globally by revenue, generating approximately $122.4 billion in 2023. The company has evolved significantly from its origins as the Bell Telephone Company, navigating through various mergers and reorganizations to become a key player in the telecommunications industry.

AT&T provides a wide range of services, including wireless communications, high-speed internet access, traditional and VoIP telephone services, and enterprise solutions such as cybersecurity and cloud services. The company caters to a diverse customer base, including individual consumers, small and medium businesses, and large enterprises and government entities. With a rich history and a commitment to innovation, AT&T continues to shape the telecommunications landscape in the United States and beyond.