2-letter country codes

The ISO 3166-1 standard structures global trade through 249 official codes that ensure the interoperability of customs and banking systems. This invisible foundation allows each nation to be identified unambiguously, whether by two letters, three letters, or three digits.

Yet, a simple typo or the use of an obsolete code is enough to block a financial transaction or international logistics routing. This article details the complete directory of 2-letter country codes and explains how to use these standards to make your databases more reliable.

1. Why the ISO 3166-1 country code governs our exchanges
2. Directory of country codes from A to L
3. Continuation of the official listing from M to Z
4. How are code changes managed?
5. 3 advantages of Alpha-2 for web development
6. Links with currencies and administrative subdivisions

The three faces of the standard: Alpha-2, Alpha-3, and numeric

The standard offers three distinct formats. Alpha-2 uses two letters and Alpha-3 uses three. The numeric format relies on three digits. Each version meets specific technical constraints.

Code	Country / Territory	Code	Country / Territory	Code	Country / Territory
AD	Andorra	AE	United Arab Emirates	AF	Afghanistan
AG	Antigua and Barbuda	AI	Anguilla	AL	Albania
AM	Armenia	AO	Angola	AQ	Antarctica
AR	Argentina	AS	American Samoa	AT	Austria
AU	Australia	AW	Aruba	AX	Åland Islands
AZ	Azerbaijan	BA	Bosnia and Herzegovina	BB	Barbados
BD	Bangladesh	BE	Belgium	BF	Burkina Faso
BG	Bulgaria	BH	Bahrain	BI	Burundi
BJ	Benin	BL	Saint Barthélemy	BM	Bermuda
BN	Brunei	BO	Bolivia	BQ	Bonaire, Sint Eustatius and Saba
BR	Brazil	BS	Bahamas	BT	Bhutan
BV	Bouvet Island	BW	Botswana	BY	Belarus
BZ	Belize	CA	Canada	CC	Cocos (Keeling) Islands
CD	Democratic Republic of the Congo	CF	Central African Republic	CG	Congo
CH	Switzerland	CI	Côte d’Ivoire	CK	Cook Islands
CL	Chile	CM	Cameroon	CN	China
CO	Colombia	CR	Costa Rica	CU	Cuba
CV	Cape Verde	CW	Curaçao	CX	Christmas Island
CY	Cyprus	CZ	Czechia	DE	Germany
DJ	Djibouti	DK	Denmark	DM	Dominica
DO	Dominican Republic	DZ	Algeria	EC	Ecuador
EE	Estonia	EG	Egypt	EH	Western Sahara
ER	Eritrea	ES	Spain	ET	Ethiopia
FI	Finland	FJ	Fiji	FK	Falkland Islands
FM	Micronesia	FO	Faroe Islands	FR	France
GA	Gabon	GB	United Kingdom	GD	Grenada
GE	Georgia	GF	French Guiana	GG	Guernsey
GH	Ghana	GI	Gibraltar	GL	Greenland
GM	Gambia	GN	Guinea	GP	Guadeloupe
GQ	Equatorial Guinea	GR	Greece	GS	South Georgia and the South Sandwich Islands
GT	Guatemala	GU	Guam	GW	Guinea-Bissau
GY	Guyana	HK	Hong Kong	HM	Heard Island and McDonald Islands
HN	Honduras	HR	Croatia	HT	Haiti
HU	Hungary	ID	Indonesia	IE	Ireland
IL	Israel	IM	Isle of Man	IN	India
IO	British Indian Ocean Territory	IQ	Iraq	IR	Iran
IS	Iceland	IT	Italy	JE	Jersey
JM	Jamaica	JO	Jordan	JP	Japan
KE	Kenya	KG	Kyrgyzstan	KH	Cambodia
KI	Kiribati	KM	Comoros	KN	Saint Kitts and Nevis
KP	North Korea	KR	South Korea	KW	Kuwait
KY	Cayman Islands	KZ	Kazakhstan	LA	Laos
LB	Lebanon	LC	Saint Lucia	LI	Liechtenstein
LK	Sri Lanka	LR	Liberia	LS	Lesotho
LT	Lithuania	LU	Luxembourg	LV	Latvia
LY	Libya	MA	Morocco	MC	Monaco
MD	Moldova	ME	Montenegro	MF	Saint Martin
MG	Madagascar	MH	Marshall Islands	MK	North Macedonia
ML	Mali	MM	Myanmar	MN	Mongolia
MO	Macao	MP	Northern Mariana Islands	MQ	Martinique
MR	Mauritania	MS	Montserrat	MT	Malta
MU	Mauritius	MV	Maldives	MW	Malawi
MX	Mexico	MY	Malaysia	MZ	Mozambique
NA	Namibia	NC	New Caledonia	NE	Niger
NF	Norfolk Island	NG	Nigeria	NI	Nicaragua
NL	Netherlands	NO	Norway	NP	Nepal
NR	Nauru	NU	Niue	NZ	New Zealand
OM	Oman	PA	Panama	PE	Peru
PF	French Polynesia	PG	Papua New Guinea	PH	Philippines
PK	Pakistan	PL	Poland	PM	Saint Pierre and Miquelon
PN	Pitcairn Islands	PR	Puerto Rico	PS	Palestine
PT	Portugal	PW	Palau	PY	Paraguay
QA	Qatar	RE	Réunion	RO	Romania
RS	Serbia	RU	Russia	RW	Rwanda
SA	Saudi Arabia	SB	Solomon Islands	SC	Seychelles
SD	Sudan	SE	Sweden	SG	Singapore
SH	Saint Helena	SI	Slovenia	SJ	Svalbard and Jan Mayen
SK	Slovakia	SL	Sierra Leone	SM	San Marino
SN	Senegal	SO	Somalia	SR	Suriname
SS	South Sudan	ST	São Tomé and Príncipe	SV	El Salvador
SX	Saint Martin, Dutch part	SY	Syria	SZ	Eswatini
TC	Turks and Caicos Islands	TD	Chad	TF	French Southern Territories
TG	Togo	TH	Thailand	TJ	Tajikistan
TK	Tokelau	TL	Timor-Leste	TM	Turkmenistan
TN	Tunisia	TO	Tonga	TR	Turkey
TT	Trinidad and Tobago	TV	Tuvalu	TW	Taiwan
TZ	Tanzania	UA	Ukraine	UG	Uganda
UM	United States Minor Outlying Islands	US	United States	UY	Uruguay
UZ	Uzbekistan	VA	Vatican	VC	Saint Vincent and the Grenadines
VE	Venezuela	VG	British Virgin Islands	VI	United States Virgin Islands
VN	Vietnam	VU	Vanuatu	WF	Wallis and Futuna
WS	Samoa	YE	Yemen	YT	Mayotte
ZA	South Africa	ZM	Zambia	ZW	Zimbabwe

The Alpha-2 format overwhelmingly dominates. It is the shortest and most visual. It is used for license plates or internet extensions.

Alpha-3 facilitates complex sorting. It mainly limits the risks of visual confusion between nations.

The numeric code ignores alphabets. It is perfect for non-Latin computer systems.

Role of ISO and the UN in maintenance

ISO does not work alone. It relies on the UN lists. The two entities collaborate to validate.

The entry criteria are strict. A territory must be a member state or a recognized entity. Political sovereignty remains the main lever.

A specific maintenance agency ensures consistency. Its work is purely technical. It avoids duplicates in the directory.

ISO cultivates an absolute neutrality. It follows diplomatic developments without ever taking sides. The update is therefore constant.

Directory of country codes from A to L

After understanding the workings of the standard, it is time to consult the concrete list of identified nations.

Alphabetical list of nations from Afghanistan to Guyana

This first part covers a wide geographical diversity. It includes economic powers and emerging nations. Alphabetical rigor facilitates research.

• AF for Afghanistan
• BR for Brazil
• CA for Canada
• FR for France
• DE for Germany
• GR for Greece

Note that some codes seem obvious. Others require verification because they rely on the local name. The logic is not always intuitive.

Recall the importance of checking for potential duplicates. Each code is unique worldwide. No confusion is allowed by the system.

Focus on dependent territories and isolated islands

Dependent territories have their own codes. The Cayman Islands use KY even though they are linked to the United Kingdom. Åland has the code AX despite its attachment to Finland. This autonomy facilitates customs management.

Explain the status of these entities. They are not sovereign states. Yet, their geographical remoteness justifies a separate identification in the ISO standard.

This allows for precise statistics. Local trade gains international visibility.

ISO thus recognizes complex territorial realities. It is a necessary pragmatism.

Special cases of entities not recognized by the UN

ISO coding sometimes goes beyond the strict framework of UN recognition to meet global technical and postal requirements.

Address disputed status areas. ISO tries to remain technical to avoid diplomatic crises. It sometimes uses temporarily reserved codes.

Specify that the absence of a code can block an economy. Companies need identifiers for their software. It is a matter of survival.

Conclude on the complexity of these cases. Each case is studied by legal experts. The *final decision often takes years*.

Continuation of the official listing from M to Z

The list continues with the second half of the alphabet, where codes essential to the web are hidden.

Country codes from Madagascar to Zimbabwe

This section groups major players on the international scene. The codes here are massively used in financial transactions. Precision remains essential for each entry.

• MG for Madagascar
• US for United States
• VN for Vietnam
• ZA for South Africa
• CH for Switzerland
• SE for Sweden

Note the use of the US code. It is probably the most requested code in global databases. Its stability is strategic for the web.

Mention the case of Zimbabwe (ZW). It is the end of the alphabetical directory. The loop is closed for sovereign nations.

Meaning of special codes XX and ZZ

The codes XX and ZZ do not designate any real country. They serve as backup variables in computer systems. XX is often used for an unknown or unspecified country. This prevents crashes during data imports.

Define the role of ZZ. This code identifies multiple entities or international zones. It is sometimes encountered in specific customs documents.

These codes are called “reserved”. They belong to private or temporary use.

Do not confuse them with real countries. They are purely utilitarian.

Differences between common names and standardized official names

The common name of a country often misleads the user. ISO uses official names that are sometimes very long. Standardization imposes a strict semantic rigor.

Give the example of Switzerland. Its code CH comes from “Confederatio Helvetica”. This Latin name guarantees neutrality among the four national languages of the country.

Refer to South Korea. Officially, it is the “Republic of Korea”. The KR code reflects this diplomatic denomination.

Conclude on the importance of consulting the official list. Never rely solely on your linguistic intuition.

How are code changes managed?

Geopolitics is fluid, and the ISO standard must adapt to borders that move or disappear.

Update mechanisms during a state dissolution

When a state disappears, its code is deleted. But this deletion is not immediate. Time must be allowed for archives to adapt.

Recall the case of the USSR. The code SU persisted long after 1991. It is now classified as a historical code in the registers.

Let’s mention Czechoslovakia (CS). Its partition gave rise to CZ and SK. The old code became obsolete instantly.

These withdrawals avoid legal confusions. A dead code must never be reassigned too quickly.

Meaning of reserved and transitional codes

Some codes are put “on reserve.” This means they cannot be used for new countries. This transition period often lasts fifty years. It allows for handling paper documents still in circulation.

Let’s define exceptional reservations. They concern international organizations or particular postal uses. These codes do not appear in the standard public list.

Managing code stocks is crucial. It prevents a shortage of combinations.

It is an alphabet logistics. Every letter counts for the future.

Table of recent geopolitical changes

The last ten years have seen several major adjustments. These changes directly impact developers and logisticians. Here is a summary of the most notable developments.

Note that software updates are imperative. Ignoring these changes causes form validation errors.

3 advantages of Alpha-2 for web development

Beyond geography, the Alpha-2 code has become a powerful technical tool to structure the modern internet.

Use of codes for top-level domains

Extensions like .fr, .be, or .ca do not come out of nowhere. They correspond exactly to the ISO Alpha-2 codes. This is the basis of the ccTLD system.

IANA uses the ISO standard to assign national extensions. This guarantees global consistency between the address and the country. The web’s hierarchy rests on this foundation.

Some historical domains do not follow ISO. But the general rule remains the two-letter standard. This is the case for the majority of territories.

This structure facilitates navigation. The internet user immediately identifies the geographical origin of a website. It is an instant visual landmark for everyone.

Database configuration and form validation

Storing a country name as plain text is a beginner’s mistake. You must use the Alpha-2 code as a primary key or index. This reduces storage space and speeds up complex SQL queries.

Here are the best practices for your data structures:

• Use CHAR(2) for the column type
• Index the country column
• Create a mapping table
• Validate via a regular expression

Validation becomes child’s play. A simple whitelist is enough to filter entries.

This way, you avoid typos. The data remains clean and usable.

Simplification of the international user experience

The Alpha-2 code allows detecting the user’s language. By cross-referencing the IP address and the country code, the site adapts automatically. It is the pillar of localization.

Specific currencies or shipping fees can be displayed. The country code becomes a trigger for features. Content personalization depends directly on it.

The systematic use of ISO codes drastically reduces friction during checkout on international e-commerce sites.

The user feels at home. Trust in the site increases mechanically. It is an undeniable gain in reading comfort.

Links with currencies and administrative subdivisions

The country code is only the tip of the iceberg; it serves as the root for other crucial international standards.

ISO 3166-2 standard and internal territorial division

The ISO 3166-2 standard extends the country code. It allows coding regions, provinces, or departments. It is surgical precision for logistics.

A suffix is added to the Alpha-2 code. For example, FR-75 designates Paris within the French nomenclature. The structure varies according to nations.

Carriers use these subdivisions to calculate tariff zones. It is an indispensable standardization. It prevents postal routing errors.

Each country manages its own subdivisions. ISO simply centralizes this data worldwide. This ensures constant updating.

Correspondence with the ISO 4217 currency standard

There is a direct link between the country and its currency. The ISO 4217 standard often takes the first two letters of the country. Thus, the Japanese Yen becomes JPY, combining JP and the letter Y. It is an unyielding logic.

The first two letters clearly indicate the origin. The third letter defines the currency unit itself. This is the case for USD or AUD.

The Euro (EUR) is an exception. It represents a union and not a single country.

This harmonization facilitates transactions. The risk of exchange errors decreases. Banks instantly identify the source of funds.

Use in passports and telephone codes

Dialing codes like +33 are not managed by ISO. It is the ITU that handles global numbering. Do not confuse the two systems.

Telephony has technical needs different from pure computing. Both are complementary. They coexist to streamline global exchanges.

From your pocket to your screen, the country code governs your daily interactions. It remains the invisible pillar of our global digital identity.

The ISO 3166-1 standard secures your global exchanges by standardizing 249 territories. By integrating these two-letter country identifiers into your databases, you ensure the reliability of your forms and logistics. Adopt this universal language now to guarantee the interoperability of your future digital systems.

FAQ

What is a 2-letter country code and what is it used for?

The 2-letter country code, officially called ISO 3166-1 Alpha-2, is an international standard used to uniquely identify each nation or territory. This short format is favored for its conciseness and clarity in global computer systems.

It is found everywhere in our digital daily life, notably as a basis for internet domain name extensions (ccTLD) such as .fr or .be, but also for banking transactions and the logistical tracking of international parcels.

What is the difference between Alpha-2, Alpha-3, and numeric formats?

The Alpha-2 format uses two letters and remains the most widespread for general use and the web. The Alpha-3 format, composed of three letters, allows a simpler visual association with the country name (like FRA for France), while the three-digit numeric code is ideal for systems not using the Latin alphabet.

Each version meets specific needs: brevity for Alpha-2, readability for Alpha-3, and technical universality for the numeric code, thus ensuring that no language barrier blocks data exchanges.

What do the special country codes XX and ZZ correspond to?

The codes XX and ZZ are reserved identifiers that do not designate any real sovereign state. The code XX is generally used to signify an “unknown country,” while the code ZZ is used to represent “multiple countries” or unspecified international areas.

These codes serve as fallback variables in databases to avoid system errors. They allow processing information whose geographic origin is undetermined or concerns multiple entities simultaneously without interrupting the data flow.

How are ISO codes updated during geopolitical changes?

When a country changes its name or borders, the ISO maintenance agency (ISO 3166/MA) intervenes to update the directory. If a state is dissolved, its former code is removed and often placed in the ISO 3166-3 list, dedicated to historical codes, to avoid any confusion with new entities.

To ensure the stability of global archives, a deleted code is not immediately reassigned. A transition period is observed, allowing administrations and companies to update their software and paper documents without risk of duplication.

Is there a link between the country code and international currencies?

Absolutely, there is a close correlation governed by the ISO 4217 standard. Most currency codes use the Alpha-2 country code as a root, complemented by a third letter designating the monetary unit. For example, for Japan, the code JP becomes JPY for the Yen.

This logical structure greatly facilitates international financial transactions. It allows banking systems to instantly identify which geographic area and currency a transaction is linked to, thus limiting conversion errors.