| IRN | Iran (ISO Country code) | 伊朗(ISO国家代码) |
| IRN | Information Resource Network | 信息资源网络 |
| IRN | Intermediate Routing Node | 中间路由选择节点 |
| IRN | International Rivers Network | 国际河流网络 |
| IRN | Intel Research Network | 英特尔研究网络 |
| IRN | Internationally Recruited Nurse (migration and labor market studies) | 国际招聘护士(移民和劳动力市场研究) |
| IRN | Interface Revision Notice | 接口修改通知 |
| IRN | Index Reference Number | 索引参考号 |
| IRN | Independent Radio News (UK) | 独立广播新闻(英国) |
| IRN | Ironton Railroad Company | 铁顿铁路公司 |
| IRN | Intermediate Routing Node (Cisco) | 中间路由节点(Cisco) |
| IRN | Internet Resources Newsletter | Internet资源新闻稿 |
| IRN | Intelligent Remote Nodes (Integrated Network Corp) | 智能远程节点(集成网络公司) |
| IRN | Instructor Radar Navigator | 指导员雷达导航器 |
| IRN | Investor Relations Network | 投资者关系网 |
| IRN | Information Resource Navigator | 信息资源导航器 |
| IRN | Internal Recurrent Neural Network | 内部递归神经网络 |
| IRN | In Room Networking | 室内网络 |
| IRN | Consolidated Rail Corporation (formerly Ironton Railroad Company) | 联合铁路公司(原Ironton Railroad Company) |