Air navigation service provider
public or a private legal entity providing Air Navigation Services.
Air Navigation Services of the Czech Republic
Austro Control
Norwegian Civil Aviation Administration
General Directorate of State Airports (Turkey)
Aeronautical Radio of Thailand
Irish Aviation Authority
Civil Aviation Department
NATS Holdings
Federal Aviation Administration
Airports Authority of India
Airways New Zealand
Civil Aviation Administration
Serco Group
Pakistan Civil Aviation Authority
Estonian Air Navigation Services
National Institute of Civil Aviation
Serbia and Montenegro Air Traffic Services Agency
Nav Canada