Southport Boats — HIN at a glance
| Manufacturer | Southport Boats |
|---|---|
| City | Augusta |
| State | Maine |
| Country | United States |
| MIC code | STH |
| HIN format | USCG (12 characters) |
| Status | Active |
| Boat types | Open motorboat |
Decode a Southport Boats HIN
Paste any HIN starting with STH — we'll decode the serial number, build month, build year and model year instantly.
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About the USCG HIN format
Southport Boats is registered with the US Coast Guard and stamps a standard 12-character Hull Identification Number on every vessel produced for the US market. The format breaks down as:
STH NNNNN M Y YY └┬┘ └──┬──┘ │ │ └┬┘ │ │ │ │ └─ Model year (last two digits) │ │ │ └──── Production year (last digit, 1972 standard) │ │ └────── Production month (A=Jan, B=Feb ... L=Dec, skipping I) │ └──────────── Hull serial number (alphanumeric) └─────────────── MIC: Manufacturer Identifier Code (STH)
Federal regulation 33 CFR § 181 requires every US-built or imported recreational vessel to display this HIN permanently on the upper starboard side of the transom, and a duplicate HIN in a hidden location inside the hull.
Other Maine boat manufacturers
- Atlantic Boat CO INC (
ABH) - Allied Boat Works, LLC (
ABW) - Arch Davis Designs (
ADD) - Maine Maritime Museum (
APP) - Apprentice Shop (The) (
ASF) - Clark Island Boat Works (
BDW) - Bass Harbor Boat (
BHB) - Brooklin Boat Yard (
BKN) - Brion Rieff Boat Builder (
BRI) - Make And Break Enterp (
BXK) - Curtis Boats (
CAU) - Chris Briggs Boats (
CBR)
Frequently asked questions
What is the MIC code for Southport Boats?
Southport Boats is assigned USCG Manufacturer Identifier Code (MIC) STH. All Southport Boats boat HINs begin with these three characters.
How long is a Southport Boats HIN?
Southport Boats uses the US HIN format: 12 characters total. The first 3 are the MIC, followed by 5 serial-number characters, 1-letter month, 1-digit year, and 2-digit model year.
Is Southport Boats still in business?
Southport Boats is currently listed as active in the US Coast Guard MIC database (last published October 2019). Even out-of-business manufacturers' HINs remain valid identifiers for the boats they built.