| Climate Reference Network | Academic & Science |
| Cosmogenic Radionuclide | Academic & Science |
| Cooperative Research Network | Academic & Science |
| Computing Research News | Academic & Science |
| Course Reference Number | Academic & Science |
| Course Registration Number | Academic & Science |
| Course Request Number | Academic & Science |
| Check Return Notification | Accounts and Finance |
| Cromarty | Airport Code |
| Career Resource Network | Business |
| Certified Radiology Nurse | Business |
| Customer Reference Number | Business |
| Cornell Corrections, Inc. | Business |
| Chemical Reactor Network | Chemistry |
| Community Resource Network | Community |
| Civil Remedy Notice | Community |
| Community Recycling Network | Community |
| Compare with Random Number | Computer Assembly Language |
| Computer Registration Number | Computer Hardware |
| Computer Reseller | Computing |
| Computer Reseller News | Computing |
| Command Reference Number | Computing |
| Cryptorun Network | Cryptocurrency |
| Clubman Rally Navigator | General |
| Club Renault Norvege | General |
| Congested Road Notification | General |
| Center Roof Node | General |
| Club Racing News | General |
| Club Reference Numbers | General |
| Toyota Carina | General |
| Collision Repair Network | General |
| Council for Responsible Nutrition | General |
| Collateral Risk Network | General |
| Current Return Network | General |
| Context Recognition Network | General |
| Commercial Relocation Network | General |
| Children's Restoration Network | General |
| Christmas Rock Night | General |
| Congress Rental Network | General |
| Class Reference Number | General |
| Collaborative Research Networks | General |
| Customer Relationship Number | General |
| Call Reference Number | General |
| Cloud Resource Names | General |
| Coordinated Registry Network | General |
| Center for Responsible Nanotechnology | General |
| Convention and Resort Network | General |
| Coupled Recurrent Network | General |
| Consumer Resource Network | General |
| Credit Reference Number | General |
| Council on Renal Nutrition's | Governmental |
| Council on Renal Nutrition | Governmental |
| Court Reporting Network | Governmental |
| CHAREGAON | Indian Railway Station |
| Comité de Reconstrucción Nacional | International |
| Can't Right Now | Internet |
| Crying Right Now | Internet |
| Cancer Research Network | Medical |
| Case Reference Number | Medical |
| Clinical Research Network | Medical |
| Certified Radiologic Nurse | Medical |
| Clinical Research Nurse | Medical |
| Canadian Registration Number | Regional |
| Carolina and Northwestern Railway (Norfolk Southern) | Regional |
| Cromarty, Scotland | Regional |
| Contract Revision Number | Space Science |
