General Discussion

The Territory of Heard Island and McDonald Islands[2][3] (HIMI;[4] ISO 3166 region code: HMD, HM, 334;[5]) is an Australian external territory comprising a volcanic group of mostly barren Antarctic islands, about two-thirds of the way from Madagascar to Antarctica. The group's overall land area is 372 km2 (144 sq mi) and it has 101.9 km (63 mi) of coastline. Discovered in the mid-19th century, the islands lie on the Kerguelen Plateau in the Indian Ocean and have been an Australian territory since 1947.
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Despite the lack of population, the islands have been assigned the country code HM in ISO 3166-1 (ISO 3166-2:HM) and therefore the Internet top-level domain .hm. The time zone of the islands is UTC+5.[56] Despite the islands having no imports or exports, the United States implemented a 10% tariff against them in April 2025.[57]