GRUBBS MARINE SERVICE HIN Decoder
Hull Identification Numbers beginning with GUO were assigned by the US Coast Guard to GRUBBS MARINE SERVICE of WINSTON SALEM, NC. The company is recorded as out of business since 2007 — 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
GUO
Location
WINSTON SALEM, NC
In business
since 1990
Status
Out of business (2007)
GRUBBS MARINE SERVICE hulls (1990–2007) 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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GRUBBS MARINE SERVICE HIN FAQ
What does a GRUBBS MARINE SERVICE HIN look like?
It starts with the three characters "GUO" — the Manufacturer Identification Code the US Coast Guard assigned to GRUBBS MARINE SERVICE — followed by a 5-character hull serial and a 4-character date code, 12 characters total. GRUBBS MARINE SERVICE hulls (1990–2007) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is GRUBBS MARINE SERVICE still in business?
USCG records list GRUBBS MARINE SERVICE as out of business since 2007. 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 GRUBBS MARINE SERVICE HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. GRUBBS MARINE SERVICE hulls (1990–2007) 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 NC
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "GRUBBS MARINE SERVICE HIN Decoder," carwhere.com/hin-decoder/guo, last verified 2026-06-12.