| UCN | Unidad del Cambio Nacionalista (Spanish) | 坎比奥民族协会(西班牙语) |
| UCN | UniÓn del Centro Nacional | UniÓn del Centro Nacional |
| UCN | UltraCompressor II New compressed file archive | UltraCompressor II新的压缩文件归档 |
| UCN | Uniserv Council Of Nevada | 内华达州Uniserv委员会 |
| UCN | Union des Campeurs Naturistes | 自然露营者联盟 |
| UCN | United Cable Network | 联合有线网络 |
| UCN | United Carrier Network, Inc. | 联合运营商网络公司。 |
| UCN | UniÓn del Cambio Nacional (Spanish; Guatemala) | UniÓn del Cambio Nacional (Spanish; Guatemala) |
| UCN | Universidad CatÓlica del Norte (Chile) | Universidad CatÓlica del Norte (Chile) |
| UCN | Unique Control Number | 唯一控制编号 |
| UCN | University College of the North (The Pas, Manitoba, Candad) | 北方大学学院(帕斯、马尼托巴、加拿大) |
| UCN | Universal Common Name | 通用通用名称 |
| UCN | United Carrier Networks | 联合运营商网络 |
| UCN | Uniform Calendar for any New Calendar Era Date (ICAS) | 任何新日历时代日期的统一日历(ICAS) |
| UCN | Ukrainian Consulting Network | 乌克兰咨询网络 |
| UCN | Únase Con Nosotros (Guatemala, political party) | Únase Con Nosotros (Guatemala, political party) |
| UCN | Unitarian Church North | 统一教会北 |
| UCN | Ultra Cold Neutron | 超冷中子 |
| UCN | Uniform Course Number | 统一课程编号 |
| UCN | Universal Control Number | 通用控制编号 |
| UCN | User Circuit Number | 用户电路编号 |
| UCN | Unidentified Cover Name (espionage) | 不明封面名称(间谍活动) |
| UCN | UniÓn del Centro Nacional (Union of the National Center; political party, Guatemala) | UniÓn del Centro Nacional (Union of the National Center; political party, Guatemala) |
| UCN | Universidad CatÓlica del Norte | Universidad CatÓlica del Norte |
| UCN | Buchanan, Liberia | 利比里亚布坎南 |