The requested vessel with name DIANA D and MMSI:0 and IMO:5256006 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
DIANA DENISSE N/A 345881076 Nov 16, 2016 21:35 UTC
DIANA DOCE N/A 224200470 TABARCA - SANTA POLA Feb 23, 2018 16:13 UTC

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