The requested vessel with name REGENCY and MMSI:0 and IMO:5163120 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
REGENCY N/A 367351950 HINGTOROWESANDBACK Feb 25, 2018 19:38 UTC

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