This repository contains some example datasets in CSV format that are used for demonstration purposes only.
The country codes refer to ISO 3166-1 alpha-2 – two-letter country codes which are also used to create the ISO 3166-2 country subdivision codes and the Internet country code top-level domains.
"country-codes.csv" contains the list of country names and codes and is based on data from ISO 3166-1 alpha-2.
The airport codes may refer to either IATA airport code, a three-letter code which is used in passenger reservation, ticketing and baggage-handling systems, or the ICAO airport code which is a four letter code used by ATC systems and for airports that do not have an IATA airport code (from wikipedia).
"airport-codes.csv" contains the list of all airports, and codes contains the list of all airport codes, and other associated attributes
such identifying airport locations, other codes (IATA, local if exist) that are relevant to identification of an airport.