Boat Hull Identification Number (HIN) Decoder
Decode manufacturer ID, certification date, and model year for watercraft, boats, and personal watercraft (PWC).
Understanding the Federal Hull Identification Number (HIN)
Governed under US Coast Guard Title 33 of the Code of Federal Regulations, Part 181, the Hull Identification Number (HIN) is a 12-character identification code that distinguishes individual marine vessels.
The Current Format Structure (1984–Present)
Since August 1, 1984, all boat manufacturers must strictly follow the current format:
- Characters 1–3: The Manufacturer Identification Code (MIC) issued exclusively by the US Coast Guard.
- Characters 4–8: The unique hull serial number designated by the builder.
- Character 9: The month of manufacture or certification (A = January through L = December).
- Character 10: The last digit of the certification year.
- Characters 11–12: The last two digits of the vessel model year.
Frequently Asked Questions
A Hull Identification Number (HIN) is a 12-character serial number affixed to watercraft manufactured or imported into the United States since November 1, 1972, under US Coast Guard regulations (33 CFR Part 181). It serves as the maritime equivalent of a motor vehicle VIN.
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