.ac.th or .ศึกษา.ไทย

This category is designed for academic institutions certified by the Ministry of Education in Thailand, or an agency with equivalent status.

.in.th or .ไทย

This category is designed for all types of entities, juristic and non-juristic person with an official location in Thailand, or an individual with Thai citizenship or a non-Thai citizen who holds a valid Thai work permit. Underage persons must register their domain name along with their guardian’s approval.

.go.th or .รัฐบาล.ไทย

This category is designed for government agencies and their supervisory projects in accordance with the cabinet resolution dated 17 December 2545 BE

.mi.th or .ทหาร.ไทย

This category is designed for Royal Thai Armed Force agencies with authorization by the Department of Military Information, Royal Thai Armed Force Headquarter, granted permission to register a domain name

.net.th or .เน็ต.ไทย

This category is designed for telecommunication business license licensees in accordance with the Telecommunication Business Act 2001.

.or.th or .องค์กร.ไทย

This category is designed for non-government organizations e.g. associations, foundations, professional councils, religious places, public organizations, independent organizations, cooperatives, political parties, embassies, chambers of commerce, clubs, social projects, or international organizations with a local branch in Thailand.

.co.th or .ธุรกิจ.ไทย

This category is designed for business entities such as:
(1) Juristic entity registered with the Department of Business Development (DBD), Ministry of Commerce in Thailand.
(2) Person or entity registered the Value Added Tax with the Revenue Department (RD), Ministry of Finance in Thailand.
(3) State Enterprises.
(4) Trademark owners who have registered with the Department of Intellectual Property (DIP), Ministry of Commerce in Thailand.
(5) Foreign juristic person or trademarks owners who appointed a grantee of power of attorney (agent) to be responsible for a domain name on their behalf. The agent must be a business entity in accordance to article (1) or (2) mentioned above.