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ISO 3166-2 is the second part of the ISO 3166 standard. It is a geocode system created for coding the names of country subdivisions and dependent areas. The purpose of the standard is to establish a worldwide series of short abbreviations for places, for use on package labels, containers, and such; anywhere where a short alphanumeric code can serve to clearly indicate a location in a more convenient and less ambiguous form than the full place name. There are around 3700 different codes.

The official name of the standard is Codes for the representation of names of countries and their subdivisions — Part 2: Country subdivision code.

Contents 1 Format 2 Changes and editions 3 Decoding/encoding lists 4 Format matrix with links to codes 5 See also 6 External links

ISO 3166-2 codes consist of two parts, separated by a hyphen. The first part is the ISO 3166-1 alpha-2 code element, the second is alphabetic or numeric and has one, two or three characters. The second part often is based on national standards.

Changes were announced in different newsletters. These mostly comprise addition of new subdivisions and spelling corrections.

1. ISO 3166-2:2000-06-21
2. ISO 3166-2:2002-05-21
3. ISO 3166-2:2002-08-20
4. ISO 3166-2:2002-12-10
5. ISO 3166-2:2003-09-05
6. ISO 3166-2:2004-03-08
7. ISO 3166-2:2005-09-13

To find the ISO 3166-2 codes for each country see ISO 3166-1, a list of countries. If you are familiar with the two-letter country codes (similar to internet country codes) you can also use the format matrix given below.

Both ways would lead to articles like ISO 3166-2:XX, where XX stands for the ISO 3166-1 code, e.g. ISO 3166-2:AU leads to the code list for Australia.

Some of the codes are developed by ISO 3166/MA, these are copyrighted. Others are already in use in the specific countries.

length	Copyright	alpha	numeric	alpha-numeric
constant 1 char	Free:
	Partially free:
	ISO - Copyright:
	Unsorted:	AR, BB, BO, CR, EC, FJ, GM, KI, KM, LS, LU, MG, NE, RW, SL, ST, TG, TM, VE	GA, IS, AT	PA
constant 2 chars	Free:	CH, US		FR
	Partially free:	AL, ID	TN
	ISO - Copyright:
	Unsorted:	AE, AM, BI, BJ, BN, BR, BS, BW, BY, CA, CD, CL, CM, CV, CZ, DE, DJ, ER, ET, FI, GE, GH, GN, GT, GW, GY, HN, HT, HU, IN, IT, IQ, JO, KW, LA, LB, LR, LT, LV, LY, MD, MU, MW, NA, NG, NI, NL, NP, OM, PK, PL, QA, SB, SH, SK, SN, SO, SR, SV, SY, SZ, TJ, TL, UY, UZ, WS, YE, YU, ZA, ZW	BD, BG, BH, CI, CN, CU, CY, DO, DZ, EE, GR, HR, IR, JM, JP, KR, LK, MM, MY, NO, PT, SA, SD, TR, TZ, UA, UM, VN, ZM	BT
constant 3 chars	Free
	Partially free:	KP
	ISO - Copyright:	MA
	Unsorted:	AO, AF, BA, BE, BF, CS, FM, GB, KZ, MD, MH, MX, NZ, PE, PG, PH, TT, TW	DK, KE, SI, UG, VU
mixed 1,2 chars	Free:	IE
	Partially free:
	ISO - Copyright:
	Unsorted:	no system?: ES, GQ, IL 1 for regions, 2 for capital: KG 1 for capital, 2 for departments: RO 1 as the general rule, 2 for exceptions SE	KH	TH
mixed 2,3	Free:
	Partially free:
	ISO - Copyright:	CO
	Unsorted:	?: AU, BZ, EG, TD 2 for republics, 3 for cities, regions, districts: RU 2 for cities, 3 for rayons: AZ 3 for capital, 2 for other: CF		MR, MV
mixed 1,3	Free:
	Partially free:
	ISO - Copyright:
	Unsorted:	MZ	MN	ML
mixed 1,2,3	Free:
	Partially free:
	ISO - Copyright:
	Unsorted:			CG, PY

• Administrative division
• List of FIPS region codes
• List of country subdivisions
• ISO 3166
• ISO 3166-1
• ISO 3166-3

• Track changes, sorted by country
• http://www.iso.org/iso/en/prods-services/iso3166ma/04background-on-iso-3166/iso3166-2.html
• http://www.unece.org/cefact/locode/service/sublocat.htm
• This says that it has permission to reproduce all codes. Some codes and names are outdated.
• Uses ISO codes internally in the free geolocation database download
• http://philmcrew.com/countrysubentity.txt