| CTN | Calibra Team Nederland 
| Others |
| CTN | Calibrated Training and Nutrition
| Others |
| CTN | California Telehealth Network
| Others |
| CTN | Call Tracking Number
| Others |
| CTN | Cambodian Television Network
| Others |
| CTN | Cannulated Tibial Nail
| Others |
| CTN | Canton Railroad
| Others |
| CTN | Canton Railroad Company
| Others |
| CTN | Cargo Tracking Note
| Others |
| CTN | Case Throat Nozzle
| Others |
| CTN | catalase T nutrition
| Others |
| CTN | Catalytic Turnover Number
| Others |
| CTN | Catholic Telemedia Network
| Others |
| CTN | Cellular Telephone Network
| Others |
| CTN | Center for Translational Neuromedicine
| Others |
| CTN | Central Test Node
| Others |
| CTN | Certification Test Network
| Others |
| CTN | Certification TestNetwork NASA
| Others |
| CTN | Certified Traditional Naturopath
| Others |
| CTN | Certified Transcultural Nurse
| Others |
| CTN | Certified Transportation Network
| Others |
| CTN | Chain Tensioner
| Others |
| CTN | Charity Trustees Network
| Others |
| CTN | Chicago Torah Network
| Others |
| CTN | Children's Treatment Network
| Others |
| CTN | Christian Television Network
| Others |
| CTN | Christian Television Network's
| Others |
| CTN | Circuito Tazio Nuvolari
| Others |
| CTN | City Transformation Network
| Others |
| CTN | Clinical Trial Network
| Others |
| CTN | Clinical Trial Notification
| Others |
| CTN | Clinical Trials Network
| Others |
| CTN | Clinical Trials Notification
| Others |
| CTN | Coalition Theory Network
| Others |
| CTN | College Television Network
| Others |
| CTN | Color Test Neuhaus
| Others |
| CTN | Colorado Telehealth Network
| Others |
| CTN | Coming Together News
| Others |
| CTN | Community Tech Network
| Others |
| CTN | Community Technology Network
| Others |
| CTN | Community Telecommunications Network
| Others |
| CTN | Community Television Network
| Others |
| CTN | Community Transportation Network
| Others |
| CTN | Compagnie Tunisienne de Navigation
| Others |
| CTN | ComSoc Technology News
| Others |
| CTN | Confectionery Tobacco and News
| Others |
| CTN | Continuation
| Others |
| CTN | Convenience, Tobacco, and News
| Others |
| CTN | Core Transmission Network
| Others |
| CTN | Corporate Telecommunication Network
| Others |
| CTN | Corporate Telecommunication Networks
| Others |
| CTN | Corporate Telecommunications Network
| Others |
| CTN | Count Transmission Number
| Others |
| CTN | Countering Threat Networks
| Others |
| CTN | Counting To a Number
| Others |
| CTN | Coverage of typical neighbourhoods
| Others |
| CTN | Creative Talent Network
| Others |
| CTN | Criminal Tracking Number
| Others |
| CTN | Cruise To Nowhere
| Others |
| CTN | Cryptologic Technician Networks
| Others |
| CTN | Cyclone Televison Network
| Others |