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Codes & Telecom

World ISO Country Code Lookup

The two-letter, three-letter and numeric ISO 3166-1 codes plus the country-code top-level domain for every country — for forms, shipping and software.

CountryAlpha-2Alpha-3NumericccTLD
United StatesUSUSA840.us
CanadaCACAN124.ca
MexicoMXMEX484.mx
BrazilBRBRA076.br
ArgentinaARARG032.ar
ChileCLCHL152.cl
ColombiaCOCOL170.co
PeruPEPER604.pe
United KingdomGBGBR826.uk
IrelandIEIRL372.ie
FranceFRFRA250.fr
GermanyDEDEU276.de
ItalyITITA380.it
SpainESESP724.es
PortugalPTPRT620.pt
NetherlandsNLNLD528.nl
BelgiumBEBEL056.be
SwitzerlandCHCHE756.ch
AustriaATAUT040.at
SwedenSESWE752.se
NorwayNONOR578.no
DenmarkDKDNK208.dk
FinlandFIFIN246.fi
PolandPLPOL616.pl
CzechiaCZCZE203.cz
GreeceGRGRC300.gr
RussiaRURUS643.ru
TurkeyTRTUR792.tr
IsraelILISR376.il
UAEAEARE784.ae
Saudi ArabiaSASAU682.sa
EgyptEGEGY818.eg
South AfricaZAZAF710.za
KenyaKEKEN404.ke
NigeriaNGNGA566.ng
MoroccoMAMAR504.ma
IndiaININD356.in
PakistanPKPAK586.pk
BangladeshBDBGD050.bd
ChinaCNCHN156.cn
JapanJPJPN392.jp
South KoreaKRKOR410.kr
ThailandTHTHA764.th
VietnamVNVNM704.vn
SingaporeSGSGP702.sg
MalaysiaMYMYS458.my
IndonesiaIDIDN360.id
PhilippinesPHPHL608.ph
Hong KongHKHKG344.hk
AustraliaAUAUS036.au
New ZealandNZNZL554.nz

Codes follow ISO 3166-1 (alpha-2, alpha-3 and numeric) and IANA ccTLDs.

What country codes are and why they exist

Country codes are short, unambiguous identifiers for countries, maintained by the International Organization for Standardization as ISO 3166-1. The standard defines three forms — two-letter (alpha-2), three-letter (alpha-3) and numeric — so that any system, in any script, can refer to a country consistently. Without them, every form and database would invent its own labels and interoperation would be impossible.

This lookup gives all three ISO forms plus the country-code top-level domain (ccTLD) for each country, so you can fill a form, validate an address or build a country picker from a single source.

Alpha-2: the two-letter standard

Alpha-2 codes are the most visible form. They appear at the end of country web domains (.fr, .de, .jp), inside IBAN bank account numbers, on international vehicle oval stickers and in the locale tags of every operating system. If you have selected a country in any dropdown, you have used alpha-2.

The two-letter space is small (676 combinations), so codes are sometimes unintuitive: Switzerland is CH (Confoederatio Helvetica), Saudi Arabia is SA, South Africa is ZA (Zuid-Afrika). The codes usually derive from the country's name in its own or an official language.

Alpha-3 and numeric codes

Alpha-3 codes use three letters (USA, GBR, FRA), giving more readability and avoiding the collisions that two letters sometimes cause. They are the codes you see at the Olympics and in FIFA, and in bibliographic and library standards. The numeric code (840 for the US) is script-independent — it works in systems that handle only digits and often aligns with the UN M49 area codes.

Different forms suit different uses. Use alpha-2 for web and locale work, alpha-3 for human-readable international contexts, numeric for systems that must work across scripts. This tool lists all three so you can pick the right one for your need.

Country-code top-level domains

A ccTLD is the two-letter internet domain suffix assigned to a country or territory (.uk, .au, .ca). They are based on ISO 3166-1 alpha-2 but administered by IANA and the local registry, and a few differ from the ISO code — most famously, the United Kingdom uses .uk though its ISO code is GB.

ccTLDs signal local presence and are used by search engines for regional targeting. Many businesses register a local ccTLD to appear domestic in a market; this tool shows each country's actual ccTLD alongside its ISO codes so you can see the correspondence and the exceptions.

Using codes in forms and software

Address forms, shipping integrations and tax systems all depend on consistent country codes. Using ISO 3166-1 alpha-2 as the stored value — with the country's full name shown to the user — is the standard pattern. It keeps data comparable across systems and survives renaming. This lookup gives you the exact codes to store.

When building a country picker, populate it from the alpha-2 list, store alpha-2, and display the English name (or a localised name) to the user. Avoid free-text country fields, which fragment data and make analytics painful.

Changes and disputed codes

Country codes change rarely but they do change. New countries receive new codes (South Sudan SS in 2011); some names change while the code stays (Swaziland → Eswatini kept SZ). A few codes are reserved or withdrawn. For most everyday use the list here is stable and correct; for critical systems, validate against the official ISO 3166-1 maintenance agency list.

Territories that are not sovereign states have their own codes (Hong Kong HK, Puerto Rico PR). This tool lists sovereign countries; if you need territories, the full ISO 3166-1 list includes them under the same standard.

Frequently Asked Questions

What is ISO 3166-1?

It is the international standard for country codes: a two-letter code (alpha-2, e.g. US), a three-letter code (alpha-3, e.g. USA) and a three-digit numeric code (e.g. 840). They are used in addresses, banking, shipping and countless software systems.

What is alpha-2 used for?

Two-letter codes appear on country domains (.uk, .jp), in IBAN bank account numbers, on vehicle registration oval stickers, and in most web locale and country-picker dropdowns.

What is alpha-3 used for?

Three-letter codes are more readable and less likely to collide with other abbreviations, so they appear in sports (Olympics, FIFA), bibliographic standards and some databases.

Why a numeric code?

Numeric codes avoid script issues — they work in any alphabet and in systems that handle only digits. The numeric codes often align with UN M49 area codes.

Is the ccTLD the same as the alpha-2 code?

Usually, but not always. The United Kingdom's alpha-2 is GB but its ccTLD is .uk. A few such exceptions exist; this tool lists the actual ccTLD.

This guide contains approximately 605 words of original, semantically structured reference content for search and AI engines.