I just happened to stumble on this the other day, another post mentioned a HIN number, thought it might be useful to the forum to have a quick ref of Alaskan manufactureres HIN decodes:
From http://www.alaskaboats.net/manufacturers/

Copy and pasted, hope the formatting stays

Manufacturers tend to come and go over the years. For this reason, we have compiled this list so that people can find out who made their particular boat. This list only goes back about 30 years so it isn't complete but it's a good start!

If your boat was made within the last 30 years then it should have a Hull ID Number (HIN) on the transom and somewhere inside the boat.
The first 3 characters of the HIN are known as the MIC and can be used to identify your manufacturer. Take the MIC and enter it at this USCG site to find out more about a particular boat builder: http://www.uscgboating.org/recalls/mic_database.htm Company Name

Manufacturers Identification Code

A Douglas Ensley II AEW
Ace Marine ACD
Advance Marine Service Center AVX
Airboats R Us ABJ
Alaska Airboats MAZ
Alaska Aluminum Products AKP
Alaska Drift Boats KRX
Alaska Homemade Boats AKZ
Alaska Hovercraft AHK
Alaska Marine EJB
Alaska Power Services ALA
Alaska Raft Houses Ltd PGW
Alaskan Kayaks AKW
Alaskan Kevtech Riverboats KTX
Allen Marine Inc EEW
Aluminum Works ALG
Amazon Boat Works AZN
Arctic Welding Service AWS
Artic Arc Welding AKQ
Atec AIK
B & B Certified Welding Inc BGP
Baidarka Boats NRX
Bain's Welding UGC
Baranof Boatworks BDQ
Bay Welding Services EKJ
Binkley Bros Inc BKC
Blue Water Boats UBW
Bluster Bay Woodworks BBJ
C.M. Welding CET
Cape Kasilof Boatworks CKA
Carlson Enterprises CEJ
C-Craft Unlimited TVN
Chugiak Boat Works CKJ
Clayton R Branda XYP
Copper River Boat Repair CQH
Cordova Outboard Inc LDE
Das Boats TGR
Eyon Metal Works EYO
Four Sea Yacht FSC
Freds's Welding FWV
Freedom Welding Service FWL
Fritzcreek Welding FZW
G White & Son GWF
Gangle's Fiberglass GGF
Gater-Jet, Inc GJT
Glass Menagerie; The GNA
Grayling Boat Works GBO
Heavy Weather Custom Boat HWB
Island Boat Works IBF
J S Enterprises JSE
Johnson Enterprises JEL
Kachemak Crafts Inc KCH
Kachemak Marine IncKMN
Kachemak Welding & Fabrication KWF
King Salmon Marine KGS
Kodiak Fiberglass KFX
Lambert Productions LOL
Lance D Stace LDS
Leecraft Welding LKT
Lisianski Marina LLL
M & M Welding JKW
M D Enterprises MDR
Madeira Boatworks KAS
Marian Boat Works WGN
Mat Su Fabrication Inc MZW
Midway Welding & Fabrication MDK
Naiad Inflatables USA Inc NFL
Nopad Co NZS
Northern Marine Maintenance NNO
Northern Marine Services QGL
Northland Designs Inc NDG
Old Spice Boat Building OSV
Old Spice Boatbuilding OLB
Orca Marine & Fiberglassing Inc ORC
Otter Marine OTT
Parker & Sons Kodiak Boats PQK
Peninsula Main.K-Craft PKC
Peregrine Falcon Inc PEM
Petersburg Public High School PEX
Petersburg Shipwrights PSO
Polar Boats & Yachts PBP
Precision (Burgess Ent) BUG
Precision Boatworks PVK
Ray's Boat Shop RSY
Rebos Marine RSM
Redding Guinn Alum & Steel GUJ
Retzel Enterprises RCR
Ron's Custom Boats RC2
S & S Welding XWS
S & S Weldng Of Alaska XWE
Salmon Shark Boats EIM
Sea-Mac Enterprises EST
See's Fabricators SFG
Shapes & Hulls Of Alaska Inc EHV
Shearwater Manufacturing, Inc SWG
Silver Eagle Marine UCN
Simpco Welding SNK
Sitka Skiffs RJE
Skiff Shop, The SKC
Sprint Marine Products SMX
Svendsen Marine Works SMW
Swiftwater Boatworks SWV
T & S Welding Inc TZW
T&S Welding Inc TQS
Terra Marine Inc TQI
Terry L Rice TLU
The Mark Ervice Co ERV
Theo W Fleming Co TWZ
Vulcan Marine VUL
Wakefield & Sons Inc WAS
Warren Yacht Works WYA
Water Walker Boats WXA
Webber Marine & Mfg Inc WVE
Wehl Built Boats WFU
West Coast Radhial Inc WQR
Westool Welding & Mfg WLW
Wits Welding WWO