In Himachal Pradesh, each Regional Transport Office (RTO) is identified by a unique code, ranging from HP01 to HP80. These codes streamline administrative processes for vehicle registration, licensing, and permits across the state, ensuring efficient service delivery and compliance with regulatory standards.
| RTO Locations | RTO Code |
| Shimla | HP01, HP02, HP03, HP07, HP62, HP63, HP50, HP51, HP52 |
| Dharamsala | HP04, HP39 |
| Mandi | HP05, HP33, HP65 |
| Rampur | HP06 |
| Chaupal | HP08 |
| Theog | HP09 |
| Rohru | HP10 |
| Arki | HP11 |
| Nalagarh | HP12 |
| Kandaghat | HP13 |
| Solan | HP14, HP59, HP64 |
| Parwanoo | HP15 |
| Rajgarh | HP16 |
| Paonta Sahib | HP17 |
| Nahan | HP18, HP71 |
| Una | HP19, HP20, HP72 |
| Barsar | HP21 |
| Ghumarwin | HP23 |
| Kalpa | HP25 |
| Nichar | HP26 |
| Pooh | HP27 |
| Sarkaghat | HP28 |
| Jogindernagar | HP29 |
| Karsog | HP30 |
| Sundernagar | HP31 |
| Gohar | HP32 |
| Hamirpur | HP34, HP60, HP67 |
| Kullu | HP34, HP61, HP66 |
| Chowari | HP57 |
| Manali | HP58 |
| Churah | HP44 |
| Pangi | HP45 |
| Bharmour | HP46 |
| Dalhousie | HP47 |
| Banjar | HP49 |
| Dodra Kawar, Distt. Shimla | HP76 |
| Bangana, Distt. Una | HP77 |
| Sangrah, Distt. Sirmaur | HP78 |
| Haroli, Distt. Una | HP79 |
| Salooni, Distt. Chamba | HP80 |