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ToggleIf you’re exploring Tamil Nadu by road, especially around Chennai or the temple town corridors, you’ll likely notice a lot of vehicles with TN 21 on their number plates. But what exactly does that signify?
TN 21 is the official vehicle registration code for Kanchipuram, one of Tamil Nadu’s most culturally significant districts, often called the City of a Thousand Temples.
For locals, it’s just another routine part of their daily commute. But for travellers, especially those on a road trip or renting a car or bike in the area, it helps to know where your vehicle is registered and what that could mean for your journey.
Kanchipuram RTO (TN 21): What Travellers Should Know?
The Regional Transport Office (RTO) in Kanchipuram isn’t exactly on the tourist trail, but it plays a big role in how the region’s road systems work.
Whether you’re renting a scooter for a quick temple hop, hiring a self-drive car to Chennai, or buying a used two-wheeler for a longer stay, the Kanchipuram RTO handles all the vehicle registrations, permits, and driver’s licenses for the TN 21 jurisdiction.
Here’s a quick look at its details:
| Field | Details |
| TN Registration | Regional Transport Office (RTO) |
| Number | TN-21 |
| City | Kanchipuram |
| State | Tamil Nadu |
| Phone | 044-27264277 |
| CUG Contact | 9384808153 |
| rtotn21@nic.in | |
| Address | Bangalore High Road, Karaipettai Village, Kanchipuram, Chennai – 631552 |
You may never have to visit this RTO in person, but it’s good to know the basics, especially if you’re driving through different districts, crossing state lines, or dealing with a vehicle-related issue.
What Makes TN 21 Relevant for Travellers?

If you’re renting a vehicle or self-driving around Tamil Nadu, that TN 21 registration isn’t just a number, it’s a tag that tells a lot about your vehicle’s origin and the governing office behind it.
Here’s why TN 21 matters to travellers:
- It’s the official RTO code for Kanchipuram
- If you’re renting from local providers in or around Kanchipuram, you’ll likely get a TN 21-registered vehicle
- It helps traffic officials identify your vehicle’s origin—especially at check posts
- If any paperwork issues arise, knowing your RTO region can make it easier to resolve problems
- In case of emergencies, permits, or accidents, the RTO link becomes crucial
So, whether you’re headed to the Kailasanathar Temple, Kamakshi Amman Temple, or making your way toward Mahabalipuram, a TN 21 vehicle connects your trip to Kanchipuram’s transport zone.
Other RTO Codes Around Kanchipuram You Might See
Kanchipuram is surrounded by a cluster of growing towns and industrial hubs, which means a variety of RTO codes show up on the roads.
While TN 21 covers Kanchipuram itself, here are some nearby RTO zones you might spot:
- TN 22 – Meenambakkam
- TN 85 – Kundrathur
- TN 01 – Chennai Central
- TN 11 – Tambaram
These codes help regional transport authorities manage traffic, streamline vehicle services, and support better local administration. For travelers, it’s just one more window into Tamil Nadu’s incredibly organized transport infrastructure.
FAQs
What district does TN 21 belong to?
TN 21 is the vehicle registration code for Kanchipuram district in Tamil Nadu.
Can I use a TN 21 vehicle outside Tamil Nadu?
Yes, TN 21-registered vehicles can be driven across India, as long as all paperwork (RC, insurance, permit) is valid and up to date.
Do rental cars in Kanchipuram have TN 21 plates?
Most rental vehicles based in Kanchipuram will carry TN 21 registration, unless they’re from a neighboring zone like Chennai or Sriperumbudur.
Do I need a special permit to drive a TN 21 vehicle in other states?
In some states, especially for commercial vehicles, entry tax or permits may be required. For private vehicles, carry complete documentation.
How do I check the registration of a TN 21 vehicle?
Use the VAHAN portal (vahan.parivahan.gov.in) and enter the vehicle number to see ownership and registration details.
Is Kanchipuram safe for self-driving tourists?
Yes! Roads are generally well-maintained. Just be cautious in market areas and during festival seasons when traffic can spike.
What documents should I carry while self-driving in Tamil Nadu?
Keep a copy (physical or digital) of your driver’s license, vehicle RC, insurance, and pollution certificate at all times.








