ALAN THOMLE BOATWORKS HIN Decoder
Hull Identification Numbers beginning with TLB were assigned by the US Coast Guard to ALAN THOMLE BOATWORKS of STANWOOD, WA. 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
TLB
Location
STANWOOD, WA
In business
since 1983
Status
Listed active in USCG records
ALAN THOMLE BOATWORKS built hulls across both HIN eras (1983–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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ALAN THOMLE BOATWORKS HIN FAQ
What does a ALAN THOMLE BOATWORKS HIN look like?
It starts with the three characters "TLB" — the Manufacturer Identification Code the US Coast Guard assigned to ALAN THOMLE BOATWORKS — followed by a 5-character hull serial and a 4-character date code, 12 characters total. ALAN THOMLE BOATWORKS built hulls across both HIN eras (1983–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 ALAN THOMLE BOATWORKS still in business?
USCG records list ALAN THOMLE BOATWORKS of STANWOOD, WA in the MIC database (registered 1983).
How do I decode the year on a ALAN THOMLE BOATWORKS HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. ALAN THOMLE BOATWORKS built hulls across both HIN eras (1983–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 WA
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "ALAN THOMLE BOATWORKS HIN Decoder," carwhere.com/hin-decoder/tlb, last verified 2026-06-12.