The requested vessel with name MELOI and MMSI:0 and IMO:6729361 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
MELOI 9392119 351132000 GR SKG Dec 13, 2017 16:40 UTC

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