The requested vessel with name MAZO and MMSI:0 and IMO:7212327 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
MAZOVIA 9010814 311000330 SWI->YSTAD->SWI Feb 20, 2018 19:30 UTC
MAZOWSZE 9386914 311005700 POLICE Feb 20, 2018 19:20 UTC

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