UNITED STATES DYNAMIC HIN Decoder
Hull Identification Numbers beginning with NDP were assigned by the US Coast Guard to UNITED STATES DYNAMIC of NORTHBROOK, IL. The company is recorded as out of business since 1977 — 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
NDP
Location
NORTHBROOK, IL
In business
—
Status
Out of business (1977)
UNITED STATES DYNAMIC hulls (1972–1977) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Free · no account · the HIN is on the transom, upper starboard (right) corner
The optional $19.99 Boat History Report adds stolen-boat, salvage/auction, incident, and USCG documentation checks — one-time, no subscription (typical boat-history services charge $25+).
UNITED STATES DYNAMIC HIN FAQ
What does a UNITED STATES DYNAMIC HIN look like?
It starts with the three characters "NDP" — the Manufacturer Identification Code the US Coast Guard assigned to UNITED STATES DYNAMIC — followed by a 5-character hull serial and a 4-character date code, 12 characters total. UNITED STATES DYNAMIC hulls (1972–1977) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Is UNITED STATES DYNAMIC still in business?
USCG records list UNITED STATES DYNAMIC as out of business since 1977. 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 UNITED STATES DYNAMIC HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. UNITED STATES DYNAMIC hulls (1972–1977) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984. Enter the full 12-character HIN above and the decoder works it out, including the legacy formats.
Other builders in IL
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "UNITED STATES DYNAMIC HIN Decoder," carwhere.com/hin-decoder/ndp, last verified 2026-06-12.