- CAA (Civil Aviation Administration) - Iceland
- CAA (Civil Aviation Administration) - Hungary
- CAA (Civil Aeronautics Administration) - Taiwan
- CAA (Civil Aviation Authority) - Jordan
- CAA (Civil Aviation Authority) - Israel
- CAA (Civil Aviation Administration) - Isle of Man
- FAA (Federal Aviation Administration) - USA
- Irish Aviation Authority (IAA) selects FREQUENTIS for country wide voice communication system modernisation
- European Civil Aviation Conference
- AZANS (Azeraeronavigatsiya) - Azerbaijan