Code Value Notes
Alpha-2 MC Alpha-2 code from ISO 3166-1
Alpha-3 MCO Alpha-3 code from ISO 3166-1
Numeric 492 Numeric code from ISO 3166-1
ITU MCO Codes assigned by the International Telecommunications Union
FIPS MN Codes from the U.S. standard FIPS PUB 10-4
IOC MON Codes assigned by the International Olympics Committee
FIFA MON Codes assigned by the Fédération Internationale de Football Association
DS MC Distinguishing signs of vehicles in international traffic
WMO   Country abbreviations used in weather reports from the World Meteorological Organization
GAUL 166 Global Administrative Unit Layers from the Food and Agriculture Organization
MARC mc MAchine-Readable Cataloging codes from the Library of Congress
DIAL 377 Country code from ITU-T recommendation E.164 (international dialing code)
TLD .mc Country code Top Level Domain