Area code 972 serves the northern and eastern suburbs of Dallas, Texas, including cities such as Plano, Garland, Irving, and Mesquite. Created in 1995 from a split of 214, it quickly became part of an overlay system with 469, 214, and 945 due to the explosive growth in the Dallas–Fort Worth metroplex. Ten-digit dialing is mandatory throughout the region. The 972 code supports one of the busiest economic corridors in the country, home to corporate headquarters, technology parks, and sprawling suburban developments. It’s a central part of North Texas telecommunications and infrastructure.