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Introduced24 July 1997
TLD typeCountry code top-level domain
RegistryHM Domain Registry
SponsorHM Domain Registry
Intended useEntities associated with Heard Island and McDonald Islands
Actual useGets rare use, none of it related to Heard and McDonald Islands; sometimes used in Khanty-Mansiysk (Russia)
Registry websiteHM Domain Registry

.hm is the Internet country code top-level domain (ccTLD) of the Heard and McDonald Islands, uninhabited islands in the southern Indian Ocean under the sovereign control of Australia. Although .hm gets a small amount of use, Australia uses the .aq domain (for Antarctica) for its sites related to the islands themselves. As a result, no .hm website is related to the location.


The .hm registry was added in July 1997. Registration services are provided by the HM Domain Registry via

Domain registration is directly at the second level, and is managed by the HM Domain Registry. Any entity can register an .hm domain.