| Chemical Speciation Network | Academic & Science |
| College of Southern Nevada | Academic & Science |
| Convergent Science Network | Academic & Science |
| Cadet Student Network | Academic & Science |
| Cable Science Network | Academic & Science |
| Carson City (nv) | Airport Code |
| Companhia Siderurgica National | Business |
| Customer Services Network | Business |
| Chesnara, P.L.C. | Business |
| Cougar School Network | Community |
| Calvary Satellite Network | Community |
| Comcast Sports Network | Community |
| Crosby, Stills, and Nash | Community |
| Community Support Network | Community |
| Community Service Network | Community |
| Community Seismic Network | Community |
| Christian Satellite Network | Community |
| Community School of Naples | Community |
| Community Services Network | Community |
| Circuit-Switched Network | Computer and Networking |
| Citrix Solutions Network | Computing |
| Channel Services Network | Computing |
| Client Server Network | Computing |
| Customer Service Number | Computing |
| Cisco Service Node | Computing |
| Calling Service Node | Computing |
| Converged Services Node | Computing |
| Core Service Network | Computing |
| Carrier Service Node | Computing |
| Customer Support Network | Computing |
| computer Systems and | Computing |
| Contact Serial Number | Contact |
| Citizen Service Number | General |
| Clean Sheet Night | General |
| Crayons Sketching Nudes | General |
| Course Subject Number | General |
| Chick Singer Night | General |
| CPF Submission Number | General |
| Core Schema Notation | General |
| Circuit Switching Network | General |
| Car Sharing Network | General |
| Certified Sports Nutritionist | General |
| Certified School Nurse | General |
| Companhia Siderúrgica Nacional | General |
| Children's Safety Network | General |
| Consumer/Survivor Network | General |
| Chip Select Not | General |
| Connectivity Service Network | General |
| Caughley Swansea Nantgarw | General |
| Child Safety Network | General |
| Comcast SportsNet NorthWest | General |
| Chintaka Sons Network | General |
| Chip Select Negative | General |
| Commission Scolaire Nouvelle | General |
| Compound subject noun | General |
| Communication Service Network | General |
| Cycle Since New | General |
| CAx Supplier Network | General |
| Cycles Since New | General |
| Consolidated Sales Network | General |
| Card Serial Number | General |
| Common Services Network | General |
| Card Select Number | General |
| Center for Sustainable Nanotechnology | General |
| Center for Systems Neuroscience | General |
| Collision Solutions Network | General |
| Cumulated Sum Of New | General |
| Cybercrime Support Network | General |
| Colombia Support Network | General |
| Cvent Supplier Network | General |
| Catalogue Sequence Number | General |
| CHALISGAON JN | Indian Railway Station |
| Consejo de Seguridad Nuclear | International |
| Comunidad Sudamericana de Naciones (Spanish, South American Community of Nations) | International |
| Confédération des Syndicats Nationaux | International |
| Computer Says No | Internet |
| Combination Sequence Number | Maths |
| Clinical Sequencing Nomenclature | Medical |
| Cancer Survivors Network | Medical |
| Compaq Services Network | Networking |
| Carson City Airport, Carson City, Nevada USA | Regional |
| Cyber Sports Network | Sports |
| Carlton Sports Network | Sports |
| Christian Sports Network | Sports |
| Common Shareholder Number | Stock Exchange |