The requested vessel with name RACKA and MMSI:227555555 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
RACKAM III N/A 227646950 Sep 18, 2017 13:28 UTC
RACKARN N/A 265673030 Aug 26, 2017 14:53 UTC

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