OLDPORT MARINE SERVICE HIN Decoder — MIC OMX
Hull Identification Numbers beginning with OMX were assigned by the US Coast Guard to OLDPORT MARINE SERVICE of NEWPORT, RI. The company is recorded as out of business since 2013 — 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
OMX
Location
NEWPORT, RI
In business
since 1986
Status
Out of business (2013)
OLDPORT MARINE SERVICE hulls (1986–2013) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
How a OLDPORT MARINE SERVICE HIN breaks down
A current-format (1984–present) Hull Identification Number is 12 characters. Using the example OMX45678D424 (illustrative):
| Characters | Segment | In example | What it identifies |
|---|---|---|---|
| 1–3 | Manufacturer (MIC) | OMX | Identifies OLDPORT MARINE SERVICE, assigned by the US Coast Guard. |
| 4–8 | Hull serial number | 45678 | OLDPORT MARINE SERVICE's own production number for the specific hull (the letters I, O, Q are never used). |
| 9 | Certification month | D | Month built — A=January … L=December (D = April). |
| 10 | Certification year | 4 | Last digit of the certification year. |
| 11–12 | Model year | 24 | The boat’s model year. |
Free · no account · the HIN is on the transom, upper starboard (right) corner
Buying this OLDPORT MARINE SERVICE? Check it before you pay.
OLDPORT MARINE SERVICE is recorded out of business (2013) — which affects recalls, parts support, and resale. The $9.99 Boat Report adds the full CPSC marine-recall check, a HIN consistency check, a verify-before-you-buy checklist, and the USCG builder record for this hull — one downloadable report, one-time, no subscription. See what's included
OLDPORT MARINE SERVICE HIN FAQ
What does a OLDPORT MARINE SERVICE HIN look like?
It starts with the three characters "OMX" — the Manufacturer Identification Code the US Coast Guard assigned to OLDPORT MARINE SERVICE — followed by a 5-character hull serial and a 4-character date code, 12 characters total. OLDPORT MARINE SERVICE hulls (1986–2013) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is OLDPORT MARINE SERVICE still in business?
USCG records list OLDPORT MARINE SERVICE as out of business since 2013. 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 OLDPORT MARINE SERVICE HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. OLDPORT MARINE SERVICE hulls (1986–2013) 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.
Where is the HIN on a OLDPORT MARINE SERVICE boat?
On the outside upper-starboard (right) corner of the transom, within two inches of the top — required by 33 CFR 181.29. Since August 1984 an identical duplicate HIN is also molded into an unexposed interior location as an anti-theft measure. Both should match the title, registration, and insurance card exactly.
Is the "OMX" MIC the same as a OLDPORT MARINE SERVICE serial number?
No. "OMX" is the Manufacturer Identification Code — characters 1–3 of the HIN — that identifies OLDPORT MARINE SERVICE. The hull serial number is characters 4–8: OLDPORT MARINE SERVICE's own production number for that specific boat (the letters I, O, and Q are never used). The full 12-character HIN combines the MIC, the serial, and the date code.
Can a OLDPORT MARINE SERVICE HIN tell me the exact model?
Not on its own. A HIN encodes the builder, hull serial, certification month/year, and model year — not the model name or length. Match the decoded year and serial against OLDPORT MARINE SERVICE records, the title, or a marine survey to confirm the exact model and configuration.
Other builders in RI
Sources: verified against the USCG Manufacturer Identification Code database (refreshed monthly) · HIN format per 33 CFR Part 181, Subpart C. Reviewed by Sam Reynolds, Lead Researcher, CarWhere. Cite this page: CarWhere, "OLDPORT MARINE SERVICE HIN Decoder," carwhere.com/hin-decoder/omx, last verified 2026-06-15.