AT&T

AT&T Inc. is a multinational telecommunications conglomerate headquartered in Dallas, Texas, and one of the largest providers of mobile telephone and broadband internet services in the United States. Founded in 1885 as part of the Bell Telephone system, AT&T offers wireless phone plans, fiber internet (AT&T Fiber), and home phone services to both residential and business customers. The company generates over $125 billion in annual revenue and employs approximately 140,000–190,000 people across its operations. AT&T Business serves enterprise clients with networking, IoT, cybersecurity, and managed services, while its FirstNet subsidiary provides dedicated network infrastructure for U.S. first responders.