Kdt
by thousands of untitled, do you mean showing with full details including CN but showing, 'Untitled' in the AC field, this is because this field is populated from airliners.net and usually indicates a white tail airliner or bizjet, as this field shows what is input by those uploading the photo that is picked up from that site.
Or do you mean entries with the '...' in the AT field. This can be changed by just deleting the ... in database explorer and manually updating with the correct code from airframes.net/GAS. If the code is relatively old, then once you delete the ..., the correct code will be picked up automatically by the airnet server next time you pick up the aircraft.