CAT Telecom PCL

CAT Telecom PCL, also known as CAT Telecom or simply CAT, is a state‑owned telecommunications enterprise headquartered in Thailand. The company supplies fixed‑line telephone services that include local, long‑distance and international voice calls for residential and business customers. It also operates a mobile network offering voice, SMS and data services under its own brand and as a mobile virtual network operator for partners. In the broadband segment, CAT Telecom delivers DSL, fiber‑to‑the‑home and wireless internet access to households, enterprises and government institutions. Its leased line and data centre offerings provide dedicated IP connectivity, virtual private networks and cloud‑based solutions for corporate clients. As the operator of Thailand’s primary international internet gateway, CAT Telecom manages the landing points of several submarine cable systems and routes cross‑border traffic for both domestic and foreign carriers. The company’s portfolio further encompasses ICT outsourcing, managed security services, satellite communications and specialised solutions for sectors such as finance, healthcare and education. These services are delivered throughout Thailand and, through its gateway function, to international destinations, positioning CAT Telecom as a conduit for both national and global communications.

Being a state‑owned enterprise, CAT Telecom operates under the direct oversight of the Ministry of Digital Economy and Society and is entrusted with implementing national telecommunications policies. One of its most visible policy roles was its participation in the government’s single internet gateway initiative, which sought to centralise and monitor all inbound and outbound internet traffic through a single point of control. The 2015 intrusion by the hacktivist group Anonymous targeted CAT Telecom precisely because of its association with this gateway project, leading to the exposure of customer login credentials, personal data of government officials and confidential documents related to the policy. The breach caused temporary downtime of the company’s public website and highlighted the susceptibility of state‑run telecom assets to politically motivated cyber attacks. Before its 2021 merger with TOT Public Company Limited to form the National Telecom (NT) entity, CAT Telecom was recognised as one of the two major state‑run carriers that shaped Thailand’s telecommunications landscape, alongside its counterpart TOT. Its specialised expertise in managing the country’s international internet gateway and its mandate to support government‑driven digital strategies distinguished it from purely commercial operators in the market. Following the merger, the former CAT Telecom operations were integrated into NT, which now continues to provide the services and policy functions previously carried out by CAT Telecom.