1873367 ONTARIO LTD HIN Decoder — MIC YSY
Hull Identification Numbers beginning with YSY were assigned by the US Coast Guard to 1873367 ONTARIO LTD of KESWICK, 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
YSY
Location
KESWICK, ON
In business
since 2014
Status
Listed active in USCG records
1873367 ONTARIO LTD hulls (2014–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
How a 1873367 ONTARIO LTD HIN breaks down
A current-format (1984–present) Hull Identification Number is 12 characters. Using the example YSY45678D424 (illustrative):
| Characters | Segment | In example | What it identifies |
|---|---|---|---|
| 1–3 | Manufacturer (MIC) | YSY | Identifies 1873367 ONTARIO LTD, assigned by the US Coast Guard. |
| 4–8 | Hull serial number | 45678 | 1873367 ONTARIO LTD's own production number for the specific hull (the letters I, O, Q are never used). |
| 9 | Certification month | D | Month built — A=January … L=December (D = April). |
| 10 | Certification year | 4 | Last digit of the certification year. |
| 11–12 | Model year | 24 | The boat’s model year. |
Free · no account · the HIN is on the transom, upper starboard (right) corner
Buying this 1873367 ONTARIO LTD? Check it before you pay.
Decoding the HIN confirms the year and serial, but not the safety record. The $9.99 Boat Report adds the full CPSC marine-recall check, a HIN consistency check, a verify-before-you-buy checklist, and the USCG builder record for this hull — one downloadable report, one-time, no subscription. See what's included
1873367 ONTARIO LTD HIN FAQ
What does a 1873367 ONTARIO LTD HIN look like?
It starts with the three characters "YSY" — the Manufacturer Identification Code the US Coast Guard assigned to 1873367 ONTARIO LTD — followed by a 5-character hull serial and a 4-character date code, 12 characters total. 1873367 ONTARIO LTD hulls (2014–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is 1873367 ONTARIO LTD still in business?
USCG records list 1873367 ONTARIO LTD of KESWICK, ON in the MIC database (registered 2014).
How do I decode the year on a 1873367 ONTARIO LTD HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. 1873367 ONTARIO LTD hulls (2014–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.
Where is the HIN on a 1873367 ONTARIO LTD boat?
On the outside upper-starboard (right) corner of the transom, within two inches of the top — required by 33 CFR 181.29. Since August 1984 an identical duplicate HIN is also molded into an unexposed interior location as an anti-theft measure. Both should match the title, registration, and insurance card exactly.
Is the "YSY" MIC the same as a 1873367 ONTARIO LTD serial number?
No. "YSY" is the Manufacturer Identification Code — characters 1–3 of the HIN — that identifies 1873367 ONTARIO LTD. The hull serial number is characters 4–8: 1873367 ONTARIO LTD's own production number for that specific boat (the letters I, O, and Q are never used). The full 12-character HIN combines the MIC, the serial, and the date code.
Can a 1873367 ONTARIO LTD HIN tell me the exact model?
Not on its own. A HIN encodes the builder, hull serial, certification month/year, and model year — not the model name or length. Match the decoded year and serial against 1873367 ONTARIO LTD records, the title, or a marine survey to confirm the exact model and configuration.
Other builders in ON
Sources: verified against the USCG Manufacturer Identification Code database (refreshed monthly) · HIN format per 33 CFR Part 181, Subpart C. Reviewed by Sam Reynolds, Lead Researcher, CarWhere. Cite this page: CarWhere, "1873367 ONTARIO LTD HIN Decoder," carwhere.com/hin-decoder/ysy, last verified 2026-06-15.