The requested vessel with name MASAN and MMSI:0 and IMO:5227990 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
MASAN 8213562 572720210 ALANG Jul 15, 2014 22:15 UTC
MASANARO N/A 244020509 Sep 28, 2017 12:06 UTC
MASANY N/A 408903157 Nov 09, 2017 07:39 UTC

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