| Acronym | Definition |
|---|
| RAN | Royal Australian Navy |
| RAN | Radio Access Network |
| RAN | Rainforest Action Network |
| RAN | Random Number |
| RAN | Return Authorization Number |
| RAN | Radicalisation Awareness Network (EU) |
| RAN | Randolph AFB (USAF base in Universal City, TX, USA) |
| RAN | Regional Advanced Networks |
| RAN | Remote Access Network |
| RAN | Relative Adapter Number |
| RAN | Revenue Anticipation Notes |
| RAN | Regional Area Network |
| RAN | Research Advocacy Network |
| RAN | Religious Action Network |
| RAN | Regional Air Navigation |
| RAN | Recorded Announcer (Vodavi) |
| RAN | Registration Access Number |
| RAN | Retail Association of Nevada (Carson City, NV) |
| RAN | Radio Area Network |
| RAN | Remote Access Node |
| RAN | Remise à Niveau (French) |
| RAN | Request for Authority To Negotiate |
| RAN | Resource Access Negotiations (Canada) |
| RAN | Régie des Chemins de Fer Abidjan-Niger (French: Abidjan-Niger Railway Board) |
| RAN | Rapid Automatised Naming |
| RAN | Remote Asynchronous Node |
| RAN | Radiodiffusion Audionumérique (French) |
| RAN | Resource Allocation Network |
| RAN | Release Authorization Number (Electronic Data Interchange) |
| RAN | Random Access Number |
| RAN | Resident Admit Note (medical/hospitals) |
| RAN | Readiness Assessment Network |
| RAN | Resource Allocation Notice |
| RAN | Release Authorization Notice |
| RAN | Requisition Account Number |
| RAN | Reporting Account/ing Number |
| RAN | Reconnaissance Attach Navigator |
| RAN | Reanswerable Signal (CCS #7 & ITU-T) |