The requested vessel with name GROUPER ANN and MMSI:396300000 and IMO:0 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
GROUPER ANN N/A 470220000 HAMRIYAH Feb 19, 2018 12:19 UTC

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