The requested vessel with name MONTENERO and MMSI:0 and IMO:5240887 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
MONTENERO 9779264 247343700 Dec 17, 2017 12:39 UTC
MONTENERO SEGUNDO N/A 224357960 SANTANDER Sep 16, 2016 14:54 UTC

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