Below are details on the sources on which the individual country datasets are partially based:

Argentina:

Australia: Australian Bureau of Statistics, http://www.abs.gov.au, Incorporates or developed using G-NAF ©PSMA Australia Limited licensed by   the Commonwealth of Australia under the Open Geo-coded National Address File (G-NAF) End User Licence Agreement.

Austria: Bundesanstalt Statistik Österreich, http://data.statistik.gv.at

Belgium: Statistics Belgium, https://statbel.fgov.be

Botswana: Data is partially based on U.S. Census Bureau, https://www.census.gov/en.html

Brazil: Portal Brasileiro de Dados Abertos, dados.gov.br

Bulgaria:

Burkina Faso: Burkina Faso data is partially based on humdata.org (https://data.humdata.org/dataset/burkina-faso-administrative-boundaries) and adapted. Licensed CC BY-IGO  https://creativecommons.org/licenses/by/3.0/igo/legalcode

Cambodia: WFP - World Food Programme, https://data.humdata.org

Canada: Statistics Canada, 2021 Census – Boundary files, 2021. Reproduced and distributed on an "as is" basis with the permission of Statistics Canada.

Central African Republic: Central African Republic data is partially based on data.humdata.org (https://data.humdata.org/dataset/cod-ab-caf) and adapted. Licensed (CC BY-IGO) Creative Commons Attribution for Intergovernmental Organisations  https://creativecommons.org/licenses/by/3.0/igo/legalcode

Chad: OCHA Chad, https://data.humdata.org

Chile: SIG Corporativo INE (National Statistics Institute Chile), Open data (Geodatos Abiertos INE), original data downloaded from: https://geoine-ine-chile.opendata.arcgis.com/datasets/c6e62e8bd9f04a6a9df46fbeaf1f22fd_0?geometry=104.809%2C-59.307%2C79.321%2C-12.461, dataset: Censo 2017 Distrito Censal, Last Modified: 9/24/2019

Colombia: National Administrative Department of Statistics: www.dane.gov.co

Congo: Congo data is partially based on Humanitarian Data Exchange - https://data.humdata.org/

Czech Republic:

Denmark: Danish Geodata Agency, DAGI - Danish Administrative and Geographical Boundaries, Matrikelkortet / The Cadastral Map and Kort10 (vector), all April 2015, http://download.kortforsyningen.dk  

Democratic Republic of the Congo: Democratic Congo data is partially based on Humanitarian Data Exchange - https://data.humdata.org/

Faroe Islands: The Environment Agency, Faroe Islands, http://www.us.fo  

Federated States of Micronesia: data is partially based on pacificdata.org

Fiji: data is partially based on Pacific data hub https://pacificdata.org/  

Finland: The National Land Survey of Finland, http://www.maanmittauslaitos.fi  

France: IGN France, https://www.data.gouv.fr  

French Guiana: Institut national de l’information géographique et forestière (IGN), http://professionnels.ign.fr  

French Polynesia: data is partially based on Census 2017 (https://www.ispf.pf/bases/Recensements/2017/Presentation/conference-de-presse)

Estonia: Republic of Estonia Land Board, July 2014, http://www.maaamet.ee

Ecuador: National Institute of Statistics and Censuses INEC, http://www.ecuadorencifras.gob.ec

Eritrea: Data is partially based on Humanitarian Data Exchange Humdata.org - https://data.humdata.org/dataset/eritrea-admin-level-1-boundaries

Ethiopia: Data is partially based on Humanitarian Data Exchange (Source: CSA (Central Statistics Agency) and Regional Bureau of Finance and Economic Development (BoFED))- https://data.humdata.org/dataset/cod-ab-eth

Gabon: Gabon data is partially based on HDX - https://data.humdata.org/

Ghana: Ghana data is partially based on humdata.org (https://data.humdata.org/dataset/cod-ab-gha) and adapted. Licensed CC BY-IGO https://creativecommons.org/licenses/by/3.0/igo/legalcode

Germany:

Germany city districts:

Germany localities:

Greenland: Danish Geodata Agency, DAGI - Danish Administrative and Geographical Boundaries, Matrikelkortet / The Cadastral Map and Kort10 (vector), all April 2015, http://download.kortforsyningen.dk/  

Guadeloupe: Institut national de l’information géographique et forestière (IGN), http://professionnels.ign.fr  

Guatemala: Open Energy Information, http://en.openei.org  

Guinea: International Organization for Migration, https://data.humdata.org  

Haiti: U.S. Census Bureau, https://www.census.gov  

Honduras: Open Energy Information, http://en.openei.org  

Iceland: National Land Survey of Iceland, http://www.lmi.is  

Indonesia: WFP - World Food Programme, https://data.humdata.org  

India: MapmyIndia, http://www.mapmyindia.com  

Ireland:

Italy: Istituto Nazionale di Statistica. www.istat.it

Ivory Coast: Ivory Coast data is partially based on humdata.org (https://data.humdata.org/dataset/cote-d-ivoire-administrative-level-0-3-boundaries-and-points) and adapted. Licensed CC BY IGO https://creativecommons.org/licenses/by/3.0/igo/legalcode

Japan: Statistics of Japan. https://www.e-stat.go.jp

Kenya: Kenya data was partially based on humdata.org (https://data.humdata.org/dataset/administrative-wards-in-kenya-1450) and adapted.

Libya: OCHA Lybia, https://data.humdata.org

Lesotho: Humdata.org (source FAO and the Ministry of Local Government, cleaned by OCHA), license CC BY- IGO, https://data.humdata.org/faqs/licenses
Data downloaded from: https://data.humdata.org/dataset/cod-ab-lso?

Madagascar: Madagascar data is partially based on humdata.org (https://data.humdata.org/dataset/cod-ab-mdg) and adapted. Licensed CC BY-IGO https://creativecommons.org/licenses/by/3.0/igo/legalcode

Malawi: Malawi data is partially based on The Humanitarian Data Exchange - https://data.humdata.org

Mali: DNCT - Direction Nationale des Collectivités Territoriales https://data.humdata.org/dataset/cod-ab-mli

Maldives: data is partially based on Global islands https://rmgsc.cr.usgs.gov  

Marshall Islands: data is partially based on Pacific data hub https://pacificdata.org/  

Martinique: Institut national de l’information géographique et forestière (IGN), http://professionnels.ign.fr

Mexico: "Códigos Postales, coordenadas y colonias" published by Correos de Mexico, https://datos.gob.mx

Namibia: Data is partially based on: Namibia GeoPortal, https://namibia.africageoportal.com/

Nauru: data is partially based on Pacific data hub https://pacificdata.org/

New Zealand:

Netherlands:

Nigeria: The Humanitarian Data Exchange, https://data.humdata.org  

Niue: data is partially based on Pacific data hub - https://pacificdata.org/

Norway: Restrictions for Geonorge https://kartkatalog.geonorge.no/ 

Palau: data is partially based on Pacific data hub https://pacificdata.org/  

Paraguay: Datos Abiertos Paraguay, Dirección Nacional de Correos del Paraguay (DINACOPA), Nuevo Código Postal del Paraguay, original data downloaded from: https://www.datos.gov.py/dataset/nuevo-c%C3%B3digo-postal-del-paraguay, dataset: Zona Postal Paraguay, Last Modified: 2019-10-17

Peru: The Humanitarian Data Exchange, https://data.humdata.org  

Poland: Centralnego Ośrodka Dokumentacji Geodezyjnej Kartograficznej, http://www.codgik.gov.pl

Philippines: Philippines Statistics Authority (PSA)

Portugal:

Puerto Rico: U.S. Census Bureau, https://www.census.gov

Réunion:

Romania: National Agency for Cadastre and Land Registration, http://data.gov.ro  

Rwanda:

Samoa: data is partially based on Pacific data hub https://pacificdata.org/

Serbia: Geosrbija https://opendata.geosrbija.rs/

Singapore:

Sint Maarten: L’Institut national de l’information géographique et forestière (IGN)—Original data downloaded from https://geoservices.ign.fr/documentation/diffusion/telechargement-donnees-libres.html,
dataset: BDTOPO_3-0_TOUSTHEMES_SHP_RGAF09UTM20_D978_2020-12-15.7z /2020/, updated on 5 March 2021. 

Slovakia:

Slovenia: Statistical Office of the Republic of Slovenia, http://www.stat.si

Sierra Leone:

Solomon Islands: data is partially based on Pacific data hub https://pacificdata.org/  

South Africa:

South Korea: DATA.GO.KR, https://data.go.kr  

South Sudan:

Spain: Instituto Nacional de Estadística, http://www.ine.es  

St.Helena, Ascension and Tristan da Cunha: data is partially based on Global islands https://rmgsc.cr.usgs.gov  

St Lucia: Saint Lucia Open Data, original data downloaded from: https://data.govt.lc/dataset/st-lucia-communities, dataset: St Lucia Settlements Project - Shape File (2016), Last Modified: 2019-02-13

St Pierre and Miquelon: data is based on Geoservices- https://geoservices.ign.fr/irisge#telechargementter 

Sweden:

Switzerland:

Taiwan: National Land Surveying and Mapping Center, https://data.gov.tw

Tanzania: Small Hydro GIS Atlas, https://energydata.info

Tonga: data is partially based on Pacific data hub https://pacificdata.org/  

Tuvalu: data is partially based on Pacific data hub https://pacificdata.org/  

Ukraine: OCHA FISS, https://data.humdata.org  

United Kingdom: Ordnance Survey, http://www.ordnancesurvey.co.uk  

United States: U.S. Census Bureau, https://www.census.gov  

US Virgin Islands: U.S. Census Bureau, https://www.census.gov  

Uruguay: Uruguay data is based on ine.gub.uy (https://ine.gub.uy/documents/10181/18006/Mapas+Vectoriales+a%C3%B1o+2011/97dbcd58-80a8-472c-86cc-e8ecdaafef99) and adapted. Licensed 3 star from  https://opendatacharter.net/principles/#accessible-and-usable

Vanuatu: data is partially based on Pacific data hub https://pacificdata.org/  

Venezuela: Humdata.org (source Nacional Statistical Institute Venezuela), update date: 24/02/2021, license CC BY- IGO, https://creativecommons.org/licenses/by/3.0/igo/legalcode,

Wallis and Futuna: data is partially based on Pacific data hub - https://pacificdata.org/

Zambia: U.S. Census Bureau, https://www.census.gov

Zimbabwe: Data is partially based on Humanitarian Data Exchange (humdata.org)


Explanation of terms 

Object type*:

admin (level 0-7) This layer depicts the administrative and political boundaries of the country in question. Level “0” corresponds to the country as a whole, with an increasing level of detail for each successive level (e.g., 2, 3 and so on).

postal (1-7 digits) This layer depicts the postcode divisions of the country in question. “1” refers to one-digit postcodes, “2” to two-digit postcodes, and so on. The higher the number, the more detailed the depiction of the postcodes.

TT This layer is based on TomTom cartography.

Off. code**:

This layer contains labels featuring official regional codes - for example, the official designators of postcodes used by the national postal organization.

Nat. lang.***:

In addition to ASCII-based labels, this layer contains labels in the language (and associated special characters) of the country in question. For some countries local labels are not properly.