The requested vessel with name IONIS and MMSI:239271938 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
IONIS 7350325 239308000 KISSAMO-ANTI-KYT-PIR Feb 19, 2018 22:09 UTC

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