| UCN | Buchanan, Liberia 
| Others |
| UCN | Ukrainian Consulting Network
| Others |
| UCN | Ultra Cold Neutron
| Others |
| UCN | Ultra Cold Neutrons
| Others |
| UCN | UltraCompressor II New compressed file archive
| Others |
| UCN | Undisputed Champion Network
| Others |
| UCN | Uniform Code Number
| Others |
| UCN | Uniform Code Numbers
| Others |
| UCN | Uniform Control Number
| Others |
| UCN | Uniform Course Number
| Others |
| UCN | Unimog Club Nederland
| Others |
| UCN | Union des Campeurs Naturistes
| Others |
| UCN | Unique Code Number
| Others |
| UCN | Unique Coded Number
| Others |
| UCN | Unique Control Number
| Others |
| UCN | Uniserv Council of Nevada
| Others |
| UCN | Unit for Cognitive Neuroscience
| Others |
| UCN | Unitarian Church North
| Others |
| UCN | United Cable Network
| Others |
| UCN | United Caprine News
| Others |
| UCN | United Carrier Networks
| Others |
| UCN | United Colonial Nations
| Others |
| UCN | Universal Character Names
| Others |
| UCN | Universal City Nissan
| Others |
| UCN | Universal Common Name
| Others |
| UCN | Universal Control Number
| Others |
| UCN | Universidad Central de Nicaragua
| Others |
| UCN | University College Nordjylland
| Others |
| UCN | University College Northampton
| Others |
| UCN | University College of Northern
| Others |
| UCN | University College of the North
| Others |
| UCN | User Centric Networking
| Others |