Did you call him, or did he call you?
Whenever I was in dangerous situations, I would always make a point of calling my loved ones whenever something bad happened, and casually mention the time, so when they heard the bad news, they would realize that my call was after that point, and that I was OK.
Eventually it got to be such a routine that if I called up out of the blue, they would just ask what time it was where I was and we could get off the line.
He can call me, but I can't reach him. I even hesitate to ask him the time because we are not supposed to talk about where he is. After one incident that I thought might affect him, I waited anxiously for 4 days to hear he was okay. When he called, I asked how he was, and then how his friend was. He knew I knew what had happened.
I told him that I always knew everything he was doing, and still do, so to try to call home if anything happens. Sometimes FR and all the info we get here can cause anxiety. ;-)