The requested vessel with name SAN CRISTOBAL and MMSI:0 and IMO:5309566 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
SAN CRISTOBAL N/A 227396250 Oct 29, 2017 12:08 UTC
SAN CRISTOBAL N/A 227401090 Oct 09, 2017 13:18 UTC
SAN CRISTOBAL N/A 735059070 Jul 09, 2013 11:29 UTC

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