AT&T Inc. is a major American multinational telecommunications and media holding company headquartered in Dallas, Texas. Founded on March 3, 1885, AT&T evolved from the early telephone inventions of Alexander Graham Bell and became the backbone of the modern telecommunications industry. Today, it is one of the world’s largest telecom providers, delivering wireless communication, fiber internet, broadband, and enterprise connectivity services to millions of customers.
AT&T operates primarily as a telecommunications infrastructure company. Its core business includes wireless mobile services, which serve over 100 million subscribers across the United States, making it one of the largest wireless carriers alongside Verizon and T-Mobile. The company provides nationwide 4G LTE and expanding 5G networks, enabling high-speed mobile data, voice communication, and connected device ecosystems such as smart homes, vehicles, and IoT systems.
Another major component of AT&T’s operations is its fiber broadband and internet services, marketed under AT&T Fiber. This service delivers high-speed internet through fiber-optic infrastructure capable of speeds exceeding 1 Gbps, supporting residential users, businesses, and government organizations. Fiber is considered a strategic priority because it represents the future of fixed-line internet infrastructure.