The requested vessel with name OCEAN NEPTUNE and MMSI:0 and IMO:6424480 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
OCEAN NEPTUNE 9292589 563973000 WOPL,SINGAPORE Feb 23, 2018 20:11 UTC
OCEAN NEPTUNE 9616747 477439300 ABIDJAN Feb 13, 2018 06:42 UTC

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