The requested vessel with name FIRSTEC and MMSI:0 and IMO:7601451 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
FIRSTEC 9151242 477779300 VUNG ANG/VN Jan 15, 2018 21:16 UTC

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