Total Access Communication Public Company Limited (TAC), along with its affiliated entities, operates primarily as a wireless telecommunications provider throughout Thailand. Its business is divided into two principal segments: mobile phone services and related offerings, and the retail of mobile handsets and initial starter kits. The company predominantly delivers its communication services over the 800 MHz and 1800 MHz frequency bands. Beyond these core activities, TAC also provides asset management solutions and offers telecommunication equipment leasing and device support services. Its retail arm markets mobile phones, SIM cards, top-up vouchers, and various supplementary equipment. Furthermore, TAC is responsible for operating the information systems and centralized database necessary for number portability services. Established in 1989, Total Access Communication Public Company Limited maintains its headquarters in Bangkok, Thailand.