GLAS-PLY HIN Decoder
Hull Identification Numbers beginning with GPO were assigned by the US Coast Guard to GLAS-PLY of SNOHOMISH, 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
GPO
Location
SNOHOMISH, WA
In business
since 1990
Status
Listed active in USCG records
GLAS-PLY hulls (1990–present) 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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GLAS-PLY HIN FAQ
What does a GLAS-PLY HIN look like?
It starts with the three characters "GPO" — the Manufacturer Identification Code the US Coast Guard assigned to GLAS-PLY — followed by a 5-character hull serial and a 4-character date code, 12 characters total. GLAS-PLY hulls (1990–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is GLAS-PLY still in business?
USCG records list GLAS-PLY of SNOHOMISH, WA in the MIC database (registered 1990).
How do I decode the year on a GLAS-PLY HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. GLAS-PLY hulls (1990–present) 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 WA
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "GLAS-PLY HIN Decoder," carwhere.com/hin-decoder/gpo, last verified 2026-06-12.