The requested vessel with name DOLTEST ADA 16 and MMSI:208998816 and IMO:0 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
DOLTEST ADA 51 N/A 740998851 DEPOT TEST Jun 07, 2017 08:08 UTC

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