Serial / PIN / VIN Decoder
DecodersRead a PIN or VIN's manufacturer and structure, with model and year only where verified.
Not sure what to check first? Hand the result to the assistant.
About this tool
This decoder reads a 17-character equipment PIN or vehicle VIN and shows the manufacturer, the model year where it can be determined, the structural breakdown, and a check-digit result. It is brand-aware: off-road equipment PINs (ISO 10261) are not the same as automotive VINs, so it flags brands that do not encode the year in position 10, such as Caterpillar and Komatsu, instead of guessing.
For on-road vehicles and heavy trucks built in 1981 or later, it adds the make, model, and year from the free NHTSA vPIC database. Off-road machines are not in vPIC, so the structural decode and the brand's decode method are shown, and the AI assistant can search for the exact model and year.
Always confirm against the machine's data plate and the manufacturer's serial lookup. The frame (machine) serial carries the year, not the engine serial.
Frequently asked questions
Can you tell the year of a machine from its serial number?
Off-road PINs only recommend the year in position 10. Many brands, including Caterpillar and Komatsu, encode the year in the serial prefix and range instead, which needs the manufacturer's lookup.
What is the difference between a VIN and a PIN?
A VIN follows the road-vehicle standard (ISO 3779), with a computable check digit, the year in position 10, and the plant in position 11. An equipment PIN (ISO 10261) has no standard plant field and uses a non-public control letter.
My PIN fails the check digit. Is it fake?
Not necessarily. The check-digit math is the automotive VIN algorithm; an ISO 10261 PIN uses a different, non-public formula, so a mismatch often just means it is an equipment PIN.
Why does the year show more than one option?
The year-letter cycle repeats every 30 years, so a letter can map to two or three years. Pick the one that matches the machine's generation.
Why does my serial number look too short?
Short codes are usually a legacy serial or an engine serial, not the 17-character machine PIN. Use the machine (frame) serial to read the year.