AIS Encoding Guide and U.S. Destination Codes

• USCG AIS Encoding Guide
• Guidance on the use of the UN/LOCODE [when on International voyages] in the Destination Field in AIS Messages (IMO SN/Circ.244)
• Listing of U.S. UN/LOCODES

U.S. GUIDs (Geographic Unique IDs) which may be used in lieu of UN/LOCODES

• Listing of LOCODES sorted by Latitude-Longitude, Facility Type, and Name
• Listing of LOCODES sorted by Waterway, Facility Type, and Name
• U.S. Army Corps of Engineers Master Dock (GUID) webpage

Submit the following to request a geographically unique ID (GUID) code for an unencoded U.S. waterborne facility or geographically unique navigation point of interest (POI):

Have an AIS encoding or LOCODE question? Please contact us .