| IPN | Idaho Physicians Network 
| Others |
| IPN | Incident Page Network
| Others |
| IPN | Independent Photography Network
| Others |
| IPN | Independent Practitioner Network
| Others |
| IPN | Independent Practitioners Network
| Others |
| IPN | Indiana Perinatal Network
| Others |
| IPN | Infor Partner Network
| Others |
| IPN | Innovative Packaging Network
| Others |
| IPN | Insane Props Nation
| Others |
| IPN | Instant Payment Notification
| Others |
| IPN | Instant Payment Notifications
| Others |
| IPN | Instant Product Notification
| Others |
| IPN | Instant Purchase Notification
| Others |
| IPN | Instituto Pedro Nunes
| Others |
| IPN | Instytut Pamieci Narodowej
| Others |
| IPN | Integrated Packet Network
| Others |
| IPN | integrated Physician Network
| Others |
| IPN | integrated Physicians Network
| Others |
| IPN | Integrative Physiology and Neuroscience
| Others |
| IPN | Intelligence Processing Network
| Others |
| IPN | Inter Penetrating Network
| Others |
| IPN | Inter Platform Network
| Others |
| IPN | Interdisciplinary Program in Neuroscience
| Others |
| IPN | International PCE Network
| Others |
| IPN | International Plant Names index
| Others |
| IPN | International Predisposal Network
| Others |
| IPN | International Preservation News
| Others |
| IPN | International Printers Network
| Others |
| IPN | Internet Phone Number
| Others |
| IPN | Internet Protocol Network
| Others |
| IPN | Internet Protocol Number
| Others |
| IPN | InterPanetary Internet
| Others |
| IPN | Interpenetrating Polymer Network
| Others |
| IPN | Interpenetrating Polymer Networks
| Others |
| IPN | Interplanetary Internet
| Others |
| IPN | Intervention Project for Nurses
| Others |
| IPN | Ip Network
| Others |
| IPN | Ipatinga, Minas Gerais, Brazil
| Others |
| IPN | Irish Pharmacy News
| Others |
| IPN | Ismaili Professionals Network
| Others |
| IPN | Italian Property Network
| Others |