The requested vessel with name INFINITY II and MMSI:601123100 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
INFINITY III N/A 205339190 CHICAGO Jan 25, 2018 15:21 UTC

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