ULTRA CUSTOM BOATS HIN Decoder
Hull Identification Numbers beginning with UBI were assigned by the US Coast Guard to ULTRA CUSTOM BOATS of IRWINDALE, CA. The company is recorded as out of business since 1996 — 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
UBI
Location
IRWINDALE, CA
In business
since 1991
Status
Out of business (1996)
ULTRA CUSTOM BOATS hulls (1991–1996) 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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ULTRA CUSTOM BOATS HIN FAQ
What does a ULTRA CUSTOM BOATS HIN look like?
It starts with the three characters "UBI" — the Manufacturer Identification Code the US Coast Guard assigned to ULTRA CUSTOM BOATS — followed by a 5-character hull serial and a 4-character date code, 12 characters total. ULTRA CUSTOM BOATS hulls (1991–1996) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is ULTRA CUSTOM BOATS still in business?
USCG records list ULTRA CUSTOM BOATS as out of business since 1996. 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 ULTRA CUSTOM BOATS HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. ULTRA CUSTOM BOATS hulls (1991–1996) 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 CA
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "ULTRA CUSTOM BOATS HIN Decoder," carwhere.com/hin-decoder/ubi, last verified 2026-06-12.