The requested vessel with name YELLOWSTONE and MMSI:0 and IMO:5224948 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
YELLOWSTONE 9225251 565042000 MAPUTO Dec 09, 2017 12:02 UTC
YELLOWSTONE N/A 367682820 Dec 06, 2017 01:20 UTC

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