Code Value Notes
Alpha-2 TK Alpha-2 code from ISO 3166-1
Alpha-3 TKL Alpha-3 code from ISO 3166-1
Numeric 772 Numeric code from ISO 3166-1
ITU TKL Codes assigned by the International Telecommunications Union
FIPS TL Codes from the U.S. standard FIPS PUB 10-4
IOC   Codes assigned by the International Olympics Committee
FIFA TKL Codes assigned by the Fédération Internationale de Football Association
DS NZ Distinguishing signs of vehicles in international traffic
WMO TK Country abbreviations used in weather reports from the World Meteorological Organization
GAUL 244 Global Administrative Unit Layers from the Food and Agriculture Organization
MARC tl MAchine-Readable Cataloging codes from the Library of Congress
DIAL 690 Country code from ITU-T recommendation E.164 (international dialing code)
TLD .tk Country code Top Level Domain