| UNN | Ukrainian National News
| Others |
| UNN | UN Nutrition Network
| Others |
| UNN | Unallocated National Number
| Others |
| UNN | Undercurrents News Network
| Others |
| UNN | Underground News Network
| Others |
| UNN | Unicaf News Network
| Others |
| UNN | Union of Northern Nigeria
| Others |
| UNN | United Nations Navy
| Others |
| UNN | United Nations Nominate
| Others |
| UNN | United Native Nations
| Others |
| UNN | Universal News Network
| Others |
| UNN | Universe News Network
| Others |
| UNN | Universidad del Norte de Nicaragua
| Others |
| UNN | Universitetssykehuset Nord Norge
| Others |
| UNN | University Neighborhood Network
| Others |
| UNN | University News Network
| Others |
| UNN | University of Nigeria Nsukka
| Others |
| UNN | University of Nigeria, Nsukka
| Others |
| UNN | University of Nizhni Novgorod
| Others |
| UNN | University of Nizhny Novgorod
| Others |
| UNN | University of Northumbria at Newcastle
| Others |
| UNN | Ur Not Nice
| Others |