The int-domain is a sponsored top-level domain like e.g. also .aero. The notion "int-domain" derives from "international".
The int-domains are exclusively reserved for international treaty-based organizations, United Nations agencies and organizations which own a status as observer at the UN.
The applicant of an int-domain must be an intergovernmental organization that is established by international treaties between or among national governments. Only one registration of an int-domain is permitted for each organization.
The int-domain is said to have the strictest application policies of all TLDs , as the owner of a int-domain must be a subject of international law.
If you are interested into this subject you can get more information at the English Verision of Wikipedia, searching for ".int".
Hans-Peter Oswald
http://www.domainregistry.de/...