The requested vessel with name DIOMID and MMSI:0 and IMO:6801298 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
DIOMID 8714683 273332440 RU SVE Jan 20, 2018 17:30 UTC
DIOMID N/A 264163057 BARICI Nov 28, 2017 02:24 UTC
DIOMIDIS 9696527 636016499 VIZAG PORT Jan 15, 2018 08:34 UTC

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