The requested vessel with name MAMTA 6 and MMSI:419008243 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
MAMTA " 9466453 247322600 ORTONA ( " Feb 17, 2018 17:01 UTC
MAMTAD N/A 227249430 Feb 03, 2018 10:38 UTC

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