ONTARIO SPECIALTY UNLIMITED HIN Decoder
Hull Identification Numbers beginning with QOS were assigned by the US Coast Guard to ONTARIO SPECIALTY UNLIMITED of PORT LAMBTON, ON. The builder is listed in the USCG MIC database. Enter the full 12-character HIN below for build date, model year, and serial — free, no account.
MIC
QOS
Location
PORT LAMBTON, ON
In business
since 1988
Status
Listed active in USCG records
Parent company
576467 ONTARIO LTD
ONTARIO SPECIALTY UNLIMITED hulls (1988–present) 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
The optional $19.99 Boat History Report adds stolen-boat, salvage/auction, incident, and USCG documentation checks — one-time, no subscription (typical boat-history services charge $25+).
ONTARIO SPECIALTY UNLIMITED HIN FAQ
What does a ONTARIO SPECIALTY UNLIMITED HIN look like?
It starts with the three characters "QOS" — the Manufacturer Identification Code the US Coast Guard assigned to ONTARIO SPECIALTY UNLIMITED — followed by a 5-character hull serial and a 4-character date code, 12 characters total. ONTARIO SPECIALTY UNLIMITED hulls (1988–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is ONTARIO SPECIALTY UNLIMITED still in business?
USCG records list ONTARIO SPECIALTY UNLIMITED of PORT LAMBTON, ON in the MIC database (registered 1988), associated with 576467 ONTARIO LTD.
How do I decode the year on a ONTARIO SPECIALTY UNLIMITED HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. ONTARIO SPECIALTY UNLIMITED hulls (1988–present) 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 ON
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "ONTARIO SPECIALTY UNLIMITED HIN Decoder," carwhere.com/hin-decoder/qos, last verified 2026-06-12.