Network Programming in .NET

We’re delighted to announce that our vehicle registration lookup service now supports Indonesia. With over 150 million registered vehicles on its roads, Indonesia is one of the largest automotive markets in Southeast Asia, and adding it to our coverage has been a long-running priority. As of today, you can query Indonesian plates through the /CheckIndonesia endpoint.

What you get back

Every successful lookup returns the core vehicle attributes you’d expect: make, model, year of registration, engine displacement, body type, colour, and fuel type. Where the underlying regional registry exposes them, we also surface the VIN (chassis number), the STNK (registration certificate) expiry date, the next tax due date, and the outstanding tax amount in Indonesian rupiah.

Here’s a representative response for plate PA1554RE:

json

{
   "Description": "SUZUKI ERTIGA",
   "RegistrationYear": "2017",
   "CarMake": "SUZUKI",
   "CarModel": "ERTIGA",
   "BodyStyle": null,
   "EngineSize": "1373",
   "MakeDescription": "SUZUKI",
   "ModelDescription": "ERTIGA",
   "VIN": "MHYKZE81SHJ3XXXXX",
   "VehicleType": "MINIBUS",
   "Colour": "HITAM METALIK",
   "FuelType": "BENSIN",
   "OwnershipNumber": null,
   "StnkExpiry": "2027-10-30",
   "TaxExpiry": "2026-10-30",
   "TotalDue": 2319000,
   "Region": null,
   "Location": "SULAWESI UTARA",
   "ImageUrl": "http://nopol.id/image.aspx/@U1VaVUtJIEVSVElHQQ==",
   "Extended": null
}

A note on Indonesia’s plate system

Unlike countries with a single unified vehicle registry, Indonesia operates a federated model: each province (and sometimes individual regencies within it) runs its own SAMSAT system for collecting road tax and issuing registration documents. The first one or two letters of any Indonesian plate identify the issuing region — B for Jakarta, D for Bandung, PA for Papua, and so on — and behind each prefix sits a different government portal with its own quirks, authentication scheme, and data model.

This is why rolling out Indonesia coverage has been a region-by-region effort rather than a single integration. Every prefix we support represents a separately reverse-engineered pipeline, and the depth of data we can return varies according to what each provincial system exposes.

Current regional coverage

At launch we support nine regions, covering a substantial portion of Indonesia’s vehicle population:

Reading the response fields

A few of the returned fields warrant explanation for users unfamiliar with the Indonesian system:

• FuelType — values are returned in Bahasa Indonesia. BENSIN is petrol/gasoline; SOLAR is diesel; LISTRIK is electric.
• VehicleType — categories use the official SAMSAT classifications: MINIBUS, SEDAN, JEEP S.C.HDTP, SPD. MOTOR R2 (two-wheeled motorcycle), and so on.
• Colour — returned in Bahasa Indonesia. Common values: HITAM (black), PUTIH (white), MERAH (red), ABU-ABU (grey), often suffixed with METALIK for metallic finishes.
• StnkExpiry — the five-yearly registration certificate renewal date.
• TaxExpiry — the annual PKB road tax due date. This is the more frequently relevant of the two.
• TotalDue — the amount payable at the next renewal in rupiah, including PKB, the SWDKLLJ mandatory accident insurance contribution, opsen (provincial surcharge), and any arrears or penalties where applicable.

What’s next

We’re actively working on additional Indonesian regions, with Jawa Tengah (Central Java, prefixes G/H/K/R/AA/AD), Jawa Timur (East Java, L/M/N/P/S/W/AE/AG), Bali (DK) and Sumatera Utara (BB/BK) all on the near-term roadmap. If your use case depends on a specific Indonesian region that isn’t yet listed, get in touch — that kind of feedback is what drives our prioritisation.

The full endpoint documentation is at https://www.nopol.id/api/reg.asmx?op=CheckIndonesia.