The requested vessel with name GULF MAID and MMSI:0 and IMO:6403230 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
GULF MAIDEN 7049627 368446000 Feb 20, 2018 20:01 UTC

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