| Communication Center New | Academic & Science |
| Campus Care Network | Academic & Science |
| College Credit Now | Academic & Science |
| Campus Computing Network | Academic & Science |
| College Central Network | Academic & Science |
| Cloud Condensation Nuclei | Academic & Science |
| Chakcharan | Airport Code |
| Corescape Communications Network | Business |
| Certified Contractors Network | Business |
| CMS Certification Number | Business |
| Claims Corporation Network | Business |
| Chris Craft Industries, Inc. | Business |
| Complaint Control Number | Business |
| Co Counseling Nederland | Business |
| Christian Community Network | Community |
| Carrying Capacity Network | Community |
| Clark Community Network | Community |
| Computer Components and Networking | Community |
| Clark Comedy Network | Community |
| Church Communication Network | Community |
| Computer Collector Newsletter | Community |
| Campus Conservation Nationals | Community |
| Conservation Central Network | Community |
| Colfax Community Network | Community |
| Community College Network | Community |
| CalOptima Community Network | Community |
| Code Culture Now | Community |
| Cordless Communication Network | Computing |
| Credit Card Number | Computing |
| Campus Computer Network | Computing |
| Credit Card Network | Computing |
| Computer and Communications Network | Computing |
| Continuous Control Node | Computing |
| Cryptocurrency News | Computing |
| Cognitive Computational Neuroscience | Computing |
| Cognitive Computational | Computing |
| CustomContractNetwork | Cryptocurrency |
| CollegeCoinNetwork | Cryptocurrency |
| Charge Control Node | Electronics |
| Cadillac Clubs Northwest | General |
| Carisle Chrysler Nationals | General |
| Cobra Club Nederland | General |
| Caterham Club Norway | General |
| Corvair Club Nederland | General |
| Cadillac Club Nederland | General |
| Car Clinic Network | General |
| Cabrio Club Nederland | General |
| Classic Car Network | General |
| Collector Car Network | General |
| Citroen Connect Nav | General |
| Crystal City North Toastmasters Club | General |
| Contract Change Notification | General |
| Content Centric Networking | General |
| Cache Coherent Network | General |
| Category Control Number | General |
| Conscious Consumer Network | General |
| Code Complexity Number | General |
| Coordinated Care Network | General |
| Centre de Communications Nord | General |
| Cigna Care Network | General |
| Cable Combine Network | General |
| Coleccion Castro Naranjal | General |
| Common Course Numbering | General |
| Center for Cognitive Neuroscience | General |
| Cooperative Caring Network | General |
| Change Control Number | General |
| Cross Connect Network | General |
| Colonia Citizens Network | General |
| Cougar Care Network | General |
| Combined Communications Network | General |
| Continuing Care Nursery | General |
| Cerri Cantiere Navali | General |
| Collection Castro Nacional | General |
| Care Compass Network | General |
| Cabin Compartment Node | General |
| Certified Car Nut | General |
| Corvette Club Norway | General |
| Commer Club Nederland | General |
| Clio Club Nederland | General |
| Car Club Norway | General |
| Certificate of Convenience and Necessity | Governmental |
| Crisis Control Nursery | Governmental |
| Corruption, Cronyism, and Nepotism | Governmental |
| Certified Clinical Nutritionist | Jobs |
| Consistency of Corner Numbers | Maths |
| Cyclomatic Complexity Number | Maths |
| Cleveland Clinic Nursing | Medical |
| cerebrocortical necrosis | Medical |
| Change Control Notice | Medical |
| Community Care Network | Medical |
| Coronary Care Nursing | Medical |
| County Councils’ Network (!) | Medical |
| Critical Care Nursing | Medical |
| cyclosporine nephropathy | Medical |
| Critical Care Nurse | Medical |
| Capstone College of Nursing | Medical |
| Carrier Comfort Network | Medical |
| Corporate Care Network | Medical |
| Council of Churches in Namibia | Regional |
| Chakhcharan, Afghanistan | Regional |
| Contract Change Notice | Space Science |
