A number plate beginning with HP 31 means the vehicle was registered at Sundernagar, Himachal Pradesh. Here is what the HP 31 RTO code covers and how to read the full number.
HP 31 RTO details
| RTO code | HP 31 |
|---|---|
| State | Himachal Pradesh (HP) |
| Office | Sundernagar |
| District | Mandi |
| Office type | Registering and Licensing Authority (RLA) |
| State transport department | Official website |
How to read a HP 31 number plate
Take HP 31 AB 1234 as an example:
- HP: the state or union territory code for Himachal Pradesh.
- 31: the RTO number, here Sundernagar.
- AB: the series letters, given out in order as numbers run out.
- 1234: the unique number of the vehicle in that series.
More on this in the number plate format guide. The plate colour also tells you the vehicle type; see number plate colours.
Other RTO codes in Mandi district
HP RTO codes before and after HP 31
| Code | Office | District |
|---|---|---|
| HP 27 | Pooh | Kinnaur |
| HP 28 | Sarkaghat | Mandi |
| HP 29 | Jogindernagar | Mandi |
| HP 30 | Karsog | Mandi |
| HP 32 | Gohar | Mandi |
| HP 33 | Mandi | Mandi |
| HP 34 | Kullu | Kullu |
| HP 35 | Anni | Kullu |
See all 99 codes in the Himachal Pradesh RTO code list.
Services at the HP 31 office
Like other transport offices, the Sundernagar office handles vehicle registration, transfer of ownership, hypothecation changes, duplicate RC, fitness for transport vehicles and driving licences. Many of these can now be started online on the official Parivahan Sewa portal, and the office then checks documents or the vehicle where needed. For address, timings and fees, check the state transport department website.
This page is an independent guide, not an official record. For the final word on any registration, use the official Vahan service or ask the RTO. This list has been matched against official transport department records.
Questions people ask
HP 31 RTO is which city?
HP 31 is the RTO code of Sundernagar in Mandi district, Himachal Pradesh.
What is the full form of the HP 31 number plate code?
HP stands for Himachal Pradesh and 31 is the number of the transport office that registered the vehicle, here Sundernagar.
Can I find the owner of a HP 31 vehicle here?
No. This site only explains codes. Vehicle and owner details are protected; registered owners and authorised users can check their own vehicle on the official Parivahan services.