The requested vessel with name FOLGEFONN and MMSI:0 and IMO:5117389 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
FOLGEFONN 9172090 259530000 OELEN Oct 17, 2017 15:33 UTC

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