THUNDER PRODUCTS INC HIN Decoder
Hull Identification Numbers beginning with TPO were assigned by the US Coast Guard to THUNDER PRODUCTS INC of SKOKIE, IL. The company is recorded as out of business since 1997 — common for older hulls, and useful to know when hunting parts or records. Enter the full 12-character HIN below for build date, model year, and serial — free, no account.
MIC
TPO
Location
SKOKIE, IL
In business
since 1993
Status
Out of business (1997)
THUNDER PRODUCTS INC hulls (1993–1997) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Free · no account · the HIN is on the transom, upper starboard (right) corner
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THUNDER PRODUCTS INC HIN FAQ
What does a THUNDER PRODUCTS INC HIN look like?
It starts with the three characters "TPO" — the Manufacturer Identification Code the US Coast Guard assigned to THUNDER PRODUCTS INC — followed by a 5-character hull serial and a 4-character date code, 12 characters total. THUNDER PRODUCTS INC hulls (1993–1997) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is THUNDER PRODUCTS INC still in business?
USCG records list THUNDER PRODUCTS INC as out of business since 1997. That's common for older hulls — the HIN still decodes normally, and the out-of-business date helps date the boat and guides parts-hunting toward salvage and owner groups rather than a dealer network.
How do I decode the year on a THUNDER PRODUCTS INC HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. THUNDER PRODUCTS INC hulls (1993–1997) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits. Enter the full 12-character HIN above and the decoder works it out, including the legacy formats.
Other builders in IL
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "THUNDER PRODUCTS INC HIN Decoder," carwhere.com/hin-decoder/tpo, last verified 2026-06-12.