The requested vessel with name BLANCHE and MMSI:0 and IMO:7721809 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
BLANCHE MARIE N/A 367133140 LONG BEACH Oct 28, 2016 03:21 UTC
BLANCHETTE N/A 316220000 B 2 A Nov 18, 2017 06:17 UTC

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