Nitabug, your OP has wisdom and conflicting ideas. You want to help him and yet that's what codependents do. That's what also keeps your roller coaster moving. We can hope without being with them.
The only solution is .him. wanting to stay sober and recover 100%, every single day for the rest of .his. life. Knowing his status, answering the phone or helping him will do nothing for him if he doesn't stay committed to that goal. If you had the information today, what would that change tomarrow? He could be safe or not today and not tomarrow.
What are you doing for yourself to stop your mind from wandering to the what ifs of his life? Are you staying active in your own life? Going to counselling or Alanon. I would get so focused on him that I didn't realize how much of my day passes me by.