Decode any VIN,
straight from the NHTSA federal database.

A VIN (Vehicle Identification Number) is the 17-character serial number every U.S. road vehicle carries since 1981. The first 3 characters identify the country and manufacturer (the WMI), the next 5 describe the vehicle (model, body, engine, restraint system), the 9th is a check digit, the 10th is the model year, the 11th is the assembly plant, and the last 6 are the production sequence. The Native Base free VIN decoder feeds the 17-character VIN to the NHTSA Vehicle Product Information Catalog (vPIC) and surfaces the federally-filed year, make, model, trim, body class, GVWR class, engine, fuel type, transmission, drive type, brake system, and manufacturer plant.

The Native Base free VIN decoder pulls live from the NHTSA vPIC API at vpic.nhtsa.dot.gov. NHTSA requires every manufacturer that sells vehicles in the U.S. to file the VIN-pattern decoder for every model — so vPIC is the federal source of truth for VIN attributes. The lookup is anonymous, no data is stored or modified, and every decode returns the federally-filed attributes for that VIN.

The 9th character of every valid VIN is a check digit computed from the other 16. If the math doesn’t line up, NHTSA flags it with "Check Digit (9th position) does not calculate properly". This usually means a typo (a 0 confused with a Q, or a 1 confused with an I or L). NHTSA still decodes what it can from the WMI and the vehicle attributes, but a real production VIN should always pass the check-digit math — if you see this warning on a VIN from a real vehicle, double-check the characters against the door jamb or the dashboard plate.

Yes. The NHTSA vPIC database covers the full commercial vehicle universe: tractors, straight trucks, trailers, buses, motor coaches, and school buses. The Native Base free VIN decoder surfaces the GVWR class (the federal weight-class bucket used on commercial registration), the body class (Truck-Tractor, Trailer, Motorcoach, etc.), the engine model, the brake system type (air vs. hydraulic), and the drive configuration (6x4, 6x2, etc.) — fields commercial-auto insurance agents read directly off the dec page or off the ACORD 161 vehicle schedule.

CARFAX and AutoCheck are vehicle history reports — they aggregate accident reports, title transfers, odometer readings, and service records around a VIN. The Native Base free VIN decoder is not a history report. It returns the federally-filed vehicle attributes (the same data a manufacturer files with NHTSA when the vehicle is built) from the public vPIC database. Free, no signup, no payment, no account linking. If you need accident or title history, that’s a different (paid) class of product.

The Native Base free VIN decoder allows 5 lookups per IP address per minute. There is no daily cap and no signup required. Insurance agencies and commercial-auto underwriters that need higher-volume programmatic access can contact Native Base for API access; we can also wire the same NHTSA vPIC decode (plus our FMCSA, MOTUS, and SOS stack) directly into an AMS to pre-fill the ACORD 161 vehicle schedule from a list of VINs.