The requested vessel with name FLOKI and MMSI:251481940 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
FLOKI N/A 225987705 Jan 26, 2018 00:48 UTC
FLOKI N/A 247234530 Aug 03, 2017 11:18 UTC

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