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 Dec 18, 2017 04:16 UTC
BAYAN 9560869 434116300 TURKMENBASHI Oct 30, 2017 16:54 UTC
BAYANI 9439436 548827000 >JP KNM HBK Dec 17, 2017 10:23 UTC

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