LBI INC HIN Decoder
Hull Identification Numbers beginning with LBK were assigned by the US Coast Guard to LBI INC of GROTON, CT. 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
LBK
Location
GROTON, CT
In business
since 1975
Status
Listed active in USCG records
LBI INC built hulls across both HIN eras (1975–present): boats before August 1984 carry legacy straight-year or model-year date codes; later hulls use the current month-letter format. The decoder handles all three.
Free · no account · the HIN is on the transom, upper starboard (right) corner
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LBI INC HIN FAQ
What does a LBI INC HIN look like?
It starts with the three characters "LBK" — the Manufacturer Identification Code the US Coast Guard assigned to LBI INC — followed by a 5-character hull serial and a 4-character date code, 12 characters total. LBI INC built hulls across both HIN eras (1975–present): boats before August 1984 carry legacy straight-year or model-year date codes; later hulls use the current month-letter format. The decoder handles all three.
Is LBI INC still in business?
USCG records list LBI INC of GROTON, CT in the MIC database (registered 1975).
How do I decode the year on a LBI INC HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. LBI INC built hulls across both HIN eras (1975–present): boats before August 1984 carry legacy straight-year or model-year date codes; later hulls use the current month-letter format. The decoder handles all three. Enter the full 12-character HIN above and the decoder works it out, including the legacy formats.
Other builders in CT
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "LBI INC HIN Decoder," carwhere.com/hin-decoder/lbk, last verified 2026-06-12.