A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z The International CivilOrganization (ICAO), an agency of the United Nations, develops the principles and techniques of international air navigation and fosters the planning and development of international air transport to ensure safe and orderly growth. ... Code Airline or Company - Country Callsign Corporate Website AAB Abelag Aviation - Belgium ABG www. ... Jump to: navigation, search ... Jump to: navigation, search ...