Code Value Notes
Alpha-2 PN Alpha-2 code from ISO 3166-1
Alpha-3 PCN Alpha-3 code from ISO 3166-1
Numeric 612 Numeric code from ISO 3166-1
ITU PTC Codes assigned by the International Telecommunications Union
FIPS PC Codes from the U.S. standard FIPS PUB 10-4
IOC   Codes assigned by the International Olympics Committee
FIFA PCN Codes assigned by the Fédération Internationale de Football Association
DS   Distinguishing signs of vehicles in international traffic
WMO PT Country abbreviations used in weather reports from the World Meteorological Organization
GAUL 197 Global Administrative Unit Layers from the Food and Agriculture Organization
MARC pc MAchine-Readable Cataloging codes from the Library of Congress
DIAL 870 Country code from ITU-T recommendation E.164 (international dialing code)
TLD .pn Country code Top Level Domain