A UN countries list with additional info
for the ISO-3166 https://en.wikipedia.org/wiki/List_of_ISO_3166_country_codes https://en.wikipedia.org/wiki/ISO_3166-1_numeric
https://www.iso.org/obp/ui/#iso:pub:PUB500001:en 0: Officially assigned code elements 1: User-assigned code elements 2: Exceptionally reserved code elements 3: Transitionally reserved code elements 4: Indeterminately reserved code elements 5: Formerly assigned code elements 6: Unassigned code elements
https://gist.github.com/rosszurowski/415eb3175249fff3714b14c1c51582cc
UN Countries https://en.wikipedia.org/wiki/Member_states_of_the_United_Nations#Current_members
https://restcountries.eu/#api-endpoints-all
http://worldmap.harvard.edu/data/geonode:country_centroids_az8