The requested vessel with name BAYAN and MMSI:0 and IMO:6728317 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
BAYAN 9532317 565058000 OMU#17 Oct 18, 2017 18:29 UTC
BAYAN 9560869 434116300 LIVANOVA Oct 11, 2017 06:59 UTC
BAYANI 9439436 548827000 >JP KZU Oct 18, 2017 18:29 UTC

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