Country codes: A
Afghanistan
    
| ISO 3166-1 numeric 004 | ISO 3166-1 alpha-3 AFG | ISO 3166-1 alpha-2 AF | ICAO airport code prefix OA | 
| E.164 code 93 | IOC country code AFG | Country code top-level domain .af | ICAO aircraft regis. prefix YA- | 
| E.212 mobile country code 412 | NATO three-letter code AFG | NATO two-letter code AF | LOC MARC code AF | 
| ITU Maritime ID 401 | ITU letter code AFG | FIPS country code AF | License plate code AFG | 
| GS1 GTIN prefix — | UNDP country code AFG | WMO country code AH | ITU callsign prefixes T6A-T6Z, YAA-YAZ | 
Åland (region of Finland)
    
| ISO 3166-1 numeric 248 | ISO 3166-1 alpha-3 ALA | ISO 3166-1 alpha-2 AX | ICAO airport code prefix — | 
| E.164 code 358 | IOC country code — | Country code top-level domain .ax | ICAO aircraft regis. prefix OH- | 
| E.212 mobile country code 244 | NATO three-letter code — | NATO two-letter code FI-AL | LOC MARC code — | 
| ITU Maritime ID — | ITU letter code — | FIPS country code — | License plate code AX (unofficial) | 
| GS1 GTIN prefix — | UNDP country code — | WMO country code — | ITU callsign prefixes — | 
Albania
    
| ISO 3166-1 numeric 008 | ISO 3166-1 alpha-3 ALB | ISO 3166-1 alpha-2 AL | ICAO airport code prefix LA | 
| E.164 code 355 | IOC country code ALB | Country code top-level domain .al | ICAO aircraft regis. prefix ZA- | 
| E.212 mobile country code 276 | NATO three-letter code ALB | NATO two-letter code AL | LOC MARC code AA | 
| ITU Maritime ID 201 | ITU letter code ALB | FIPS country code AL | License plate code AL | 
| GS1 GTIN prefix 530 | UNDP country code ALB | WMO country code AB | ITU callsign prefixes ZAA-ZAZ | 
Alderney (part of Guernsey)
    
| ISO 3166-1 numeric — | ISO 3166-1 alpha-3 — | ISO 3166-1 alpha-2 — | ICAO airport code prefix — | 
| E.164 code 44 | IOC country code — | Country code top-level domain — | ICAO aircraft regis. prefix — | 
| E.212 mobile country code — | NATO three-letter code — | NATO two-letter code — | LOC MARC code — | 
| ITU Maritime ID — | ITU letter code — | FIPS country code — | License plate code GBA | 
| GS1 GTIN prefix — | UNDP country code — | WMO country code — | ITU callsign prefixes — | 
Algeria
    
| ISO 3166-1 numeric 012 | ISO 3166-1 alpha-3 DZA | ISO 3166-1 alpha-2 DZ | ICAO airport code prefix DA | 
| E.164 code 213 | IOC country code ALG | Country code top-level domain .dz | ICAO aircraft regis. prefix 7T- | 
| E.212 mobile country code 603 | NATO three-letter code DZA | NATO two-letter code AG | LOC MARC code AE | 
| ITU Maritime ID 605 | ITU letter code ALG | FIPS country code AG | License plate code DZ | 
| GS1 GTIN prefix 316 | UNDP country code ALG | WMO country code AL | ITU callsign prefixes 7RA-7RZ, 7TA-7YZ | 
American Samoa
    
| ISO 3166-1 numeric 016 | ISO 3166-1 alpha-3 ASM | ISO 3166-1 alpha-2 AS | ICAO airport code prefix NS | 
| E.164 code 1684 | IOC country code ASA | Country code top-level domain .as | ICAO aircraft regis. prefix N- | 
| E.212 mobile country code 544 | NATO three-letter code ASM | NATO two-letter code SS | LOC MARC code AS | 
| ITU Maritime ID 559 | ITU letter code SMA | FIPS country code AQ | License plate code — | 
| GS1 GTIN prefix — | UNDP country code AMS | WMO country code ZS | ITU callsign prefixes — | 
Andorra
    
| ISO 3166-1 numeric 020 | ISO 3166-1 alpha-3 AND | ISO 3166-1 alpha-2 AD | ICAO airport code prefix — | 
| E.164 code 376 | IOC country code AND | Country code top-level domain .ad | ICAO aircraft regis. prefix C3- | 
| E.212 mobile country code 213 | NATO three-letter code AND | NATO two-letter code AN | LOC MARC code AN | 
| ITU Maritime ID 202 | ITU letter code AND | FIPS country code AN | License plate code AND | 
| GS1 GTIN prefix — | UNDP country code AND | WMO country code — | ITU callsign prefixes C3A-C3Z | 
Angola
    
| ISO 3166-1 numeric 024 | ISO 3166-1 alpha-3 AGO | ISO 3166-1 alpha-2 AO | ICAO airport code prefix FN | 
| E.164 code 244 | IOC country code ANG | Country code top-level domain .ao | ICAO aircraft regis. prefix D2- | 
| E.212 mobile country code 631 | NATO three-letter code AGO | NATO two-letter code AO | LOC MARC code AO | 
| ITU Maritime ID 603 | ITU letter code AGL | FIPS country code AO | License plate code ANG (unofficial) | 
| GS1 GTIN prefix — | UNDP country code ANG | WMO country code AN | ITU callsign prefixes D2A-D3Z | 
Anguilla (British territory)
    
| ISO 3166-1 numeric 660 | ISO 3166-1 alpha-3 AIA | ISO 3166-1 alpha-2 AI | ICAO airport code prefix TQ | 
| E.164 code 1 | IOC country code — | Country code top-level domain .ai | ICAO aircraft regis. prefix VP-LA- | 
| E.212 mobile country code 365 | NATO three-letter code AIA | NATO two-letter code AV | LOC MARC code AM | 
| ITU Maritime ID 301 | ITU letter code AIA | FIPS country code AV | License plate code — | 
| GS1 GTIN prefix — | UNDP country code ANL | WMO country code AI | ITU callsign prefixes — | 
Antarctica
    
| ISO 3166-1 numeric 010 | ISO 3166-1 alpha-3 ATA | ISO 3166-1 alpha-2 AQ | ICAO airport code prefix NZ, SA, SC | 
| E.164 code 672 | IOC country code — | Country code top-level domain .aq | ICAO aircraft regis. prefix — | 
| E.212 mobile country code — | NATO three-letter code ATA | NATO two-letter code AY | LOC MARC code AY | 
| ITU Maritime ID — | ITU letter code ATA | FIPS country code AY | License plate code — | 
| GS1 GTIN prefix — | UNDP country code — | WMO country code AA | ITU callsign prefixes — | 
Antigua and Barbuda
    
| ISO 3166-1 numeric 028 | ISO 3166-1 alpha-3 ATG | ISO 3166-1 alpha-2 AG | ICAO airport code prefix TA | 
| E.164 code 1 | IOC country code ANT | Country code top-level domain .ag | ICAO aircraft regis. prefix V2- | 
| E.212 mobile country code 344 | NATO three-letter code ATG | NATO two-letter code AC | LOC MARC code AQ | 
| ITU Maritime ID 304 | ITU letter code ATG | FIPS country code AC | License plate code — | 
| GS1 GTIN prefix — | UNDP country code ANT | WMO country code AT | ITU callsign prefixes V2A-V2Z | 
Argentina
    
| ISO 3166-1 numeric 032 | ISO 3166-1 alpha-3 ARG | ISO 3166-1 alpha-2 AR | ICAO airport code prefix SA | 
| E.164 code 54 | IOC country code ARG | Country code top-level domain .ar | ICAO aircraft regis. prefix LQ-, LV- | 
| E.212 mobile country code 722 | NATO three-letter code ARG | NATO two-letter code AR | LOC MARC code AG | 
| ITU Maritime ID 701 | ITU letter code ARG | FIPS country code AR | License plate code RA | 
| GS1 GTIN prefix 778-779 | UNDP country code ARG | WMO country code AG | ITU callsign prefixes AYA-AZZ,L2A-L9Z,LOA-LWZ | 
Armenia
    
| ISO 3166-1 numeric 051 | ISO 3166-1 alpha-3 ARM | ISO 3166-1 alpha-2 AM | ICAO airport code prefix UD | 
| E.164 code 374 | IOC country code ARM | Country code top-level domain .am | ICAO aircraft regis. prefix EK- | 
| E.212 mobile country code 283 | NATO three-letter code ARM | NATO two-letter code AM | LOC MARC code AI | 
| ITU Maritime ID 216 | ITU letter code ARM | FIPS country code AM | License plate code AM | 
| GS1 GTIN prefix 485 | UNDP country code ARM | WMO country code AY | ITU callsign prefixes EKA-EKZ | 
Aruba (Kingdom of the Netherlands)
    
| ISO 3166-1 numeric 533 | ISO 3166-1 alpha-3 ABW | ISO 3166-1 alpha-2 AW | ICAO airport code prefix TN | 
| E.164 code 297 | IOC country code ARU | Country code top-level domain .aw | ICAO aircraft regis. prefix P4- | 
| E.212 mobile country code 363 | NATO three-letter code ABW | NATO two-letter code AA | LOC MARC code AW | 
| ITU Maritime ID 307 | ITU letter code ABW | FIPS country code AA | License plate code — | 
| GS1 GTIN prefix — | UNDP country code ARU | WMO country code AW | ITU callsign prefixes P4A-P4Z | 
Australia
    
| ISO 3166-1 numeric 036 | ISO 3166-1 alpha-3 AUS | ISO 3166-1 alpha-2 AU | ICAO airport code prefix Y | 
| E.164 code 61 | IOC country code AUS | Country code top-level domain .au | ICAO aircraft regis. prefix VH- | 
| E.212 mobile country code 505 | NATO three-letter code AUS | NATO two-letter code AS | LOC MARC code AT | 
| ITU Maritime ID 503 | ITU letter code AUS | FIPS country code AS | License plate code AUS | 
| GS1 GTIN prefix 930-939 | UNDP country code AUL | WMO country code AU | ITU callsign prefixes AXA-AXZ,VHA-VNZ,VZA-VZZ | 
Austria
    
| ISO 3166-1 numeric 040 | ISO 3166-1 alpha-3 AUT | ISO 3166-1 alpha-2 AT | ICAO airport code prefix LO | 
| E.164 code 43 | IOC country code AUT | Country code top-level domain .at | ICAO aircraft regis. prefix OE- | 
| E.212 mobile country code 232 | NATO three-letter code AUT | NATO two-letter code AU | LOC MARC code AU | 
| ITU Maritime ID 203 | ITU letter code AUT | FIPS country code AU | License plate code A | 
| GS1 GTIN prefix 900-919 | UNDP country code AUS | WMO country code OS | ITU callsign prefixes OEA-OEZ | 
Azerbaijan
    
| ISO 3166-1 numeric 031 | ISO 3166-1 alpha-3 AZE | ISO 3166-1 alpha-2 AZ | ICAO airport code prefix UB | 
| E.164 code 994 | IOC country code AZE | Country code top-level domain .az | ICAO aircraft regis. prefix 4K- | 
| E.212 mobile country code 400 | NATO three-letter code AZE | NATO two-letter code AJ | LOC MARC code AJ | 
| ITU Maritime ID 423 | ITU letter code AZE | FIPS country code AJ | License plate code AZ | 
| GS1 GTIN prefix 476 | UNDP country code AZE | WMO country code AJ | ITU callsign prefixes 4JA-4KZ |