.MN refers to the official domain extension or the internet country code top level domain (ccTLD) of Mongolia. It was introduced in 1995 and was intended for entities with connection to this country. This domain suffix is popular in Mongolia. It is also used by some companies in Minnesota although there is no official agreement between the governments of Minnesota and Mongolia.
Aside from being used as Mongolia’s two-letter country code, MN is also used to abbreviate other words. Popular meanings of MN include: Minnesota (US state), manganese (chemistry), motor neuron (medical), magnetic north (military) and maximum naturality (mathematics).
There is no special process needed to register a .MN domain name, no special action is needed on your end.