The requested vessel with name DEWAN 1 and MMSI:0 and IMO:7221237 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
DEWANA DHARMA 8135629 525015953 SAPE NTB Feb 04, 2016 11:22 UTC

Also, you may try to find the vessel in our comprehensive Vessels Database or track this ship on the map.