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.ms is the Internet country code top-level domain (ccTLD) for Montserrat, a British Overseas Territory.^[1]

Usage examples

Microsoft uses this as an abbreviation for projects such as ch9.ms, 1drv.ms for OneDrive, and for Defender for Cloud Apps.^[2] In particular, aka.ms is used extensively as a URL shortener for Microsoft’s web sites, such as http://aka.ms/MFAsetup.
Websites based in, or having to do with, the U.S. state of Mississippi also use the .ms domain^[3] as MS is the ISO 3166-2:US code and official United States Postal Service abbreviation for the state. Technically, Mississippi is assigned .ms.us under the .us locality namespace.
Some companies based in the Brazilian state of Mato Grosso do Sul (officially abbreviated as MS) use the .ms TLD
Some companies and organisations in the German city Münster in Westphalia use the TLD as well since MS is the official vehicle license plate code for the city.
The New York Times uses .ms as a top level domain name for permalinks referring to New York Times addresses. For example, nyti.ms reaches The New York Times homepage.
The Hillary Clinton 2016 presidential campaign used the domain name “HRC.ms” as a URL shortener.
The family of F1 driver Michael Schumacher used the domain name keepfighting.ms for his foundation, established after his skiing accident in Méribel on 29 December 2013
A Dutch foundation for the cure of multiple sclerosis (MS) uses arenamoves.ms.
The Dutch organisation openbsd.amsterdam uses obsda.ms for its short code link.