| UPN | Pallet Network 
| Others |
| UPN | The Universal Principle Name
| Others |
| UPN | U Peoples Network
| Others |
| UPN | Ubiquitous Public Network
| Others |
| UPN | Ultra Pok Network
| Others |
| UPN | Umgekehrt Polnische Notation
| Others |
| UPN | Un-Popular Network
| Others |
| UPN | Unapproved Parts Notifications
| Others |
| UPN | Undeclared Pre Nursing
| Others |
| UPN | Undergraduate Pipeline Network
| Others |
| UPN | Unified Physicians Network
| Others |
| UPN | Uniform Public Network
| Others |
| UPN | Union du peuple navarrais
| Others |
| UPN | Unique Pedigree Number
| Others |
| UPN | Unique Program Number
| Others |
| UPN | Unique Project Number
| Others |
| UPN | Unique Property Number
| Others |
| UPN | Unique Pupil Number
| Others |
| UPN | Unite Private Networks
| Others |
| UPN | United Pallet Network
| Others |
| UPN | United Paramount Network
| Others |
| UPN | United Pastors Network
| Others |
| UPN | United Pharmacy Network
| Others |
| UPN | United Plantation of Negroes
| Others |
| UPN | United Programming Network
| Others |
| UPN | United Protectors Network
| Others |
| UPN | Universal Permanent Number
| Others |
| UPN | Universal Principal Name
| Others |
| UPN | Universal Process Notation
| Others |
| UPN | Universal Product Number
| Others |
| UPN | Universidad Privada del Norte
| Others |
| UPN | University Park North
| Others |
| UPN | University Physicians Network
| Others |
| UPN | Unknown Primary Neoplasm
| Others |
| UPN | Unlimited Pitiful N
| Others |
| UPN | Unrelenting Punishment Network
| Others |
| UPN | Unversity Physicians Network
| Others |
| UPN | Urban Professionals Network
| Others |
| UPN | Uruapan, Mexico
| Others |
| UPN | Used Parts Network
| Others |
| UPN | Used Parts Networks
| Others |
| UPN | User Principal Name
| Others |
| UPN | User Principal Names
| Others |
| UPN | User Profile Name
| Others |
| UPN | User Protocol Name
| Others |