The requested vessel with name CEDROS and MMSI:0 and IMO:5257438 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
CEDROS N/A 431101136 JP SGM OFF Feb 20, 2018 02:01 UTC

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