O.K.K. CORPORATION HIN Decoder
Hull Identification Numbers beginning with XOK were assigned by the US Coast Guard to O.K.K. CORPORATION of COLUMBIA, MD. The company is recorded as out of business since 1999 — 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
XOK
Location
COLUMBIA, MD
In business
since 1995
Status
Out of business (1999)
O.K.K. CORPORATION hulls (1995–1999) 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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O.K.K. CORPORATION HIN FAQ
What does a O.K.K. CORPORATION HIN look like?
It starts with the three characters "XOK" — the Manufacturer Identification Code the US Coast Guard assigned to O.K.K. CORPORATION — followed by a 5-character hull serial and a 4-character date code, 12 characters total. O.K.K. CORPORATION hulls (1995–1999) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is O.K.K. CORPORATION still in business?
USCG records list O.K.K. CORPORATION as out of business since 1999. 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 O.K.K. CORPORATION HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. O.K.K. CORPORATION hulls (1995–1999) 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 MD
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "O.K.K. CORPORATION HIN Decoder," carwhere.com/hin-decoder/xok, last verified 2026-06-12.