Restricted Call

Is it only I who received a call that said on the display that it's restricted? There was no phone humber. It only showed the time and that it's Restricted. Hmmm. If ever you received such a call, let me know please. I answered that call and I realy heard somebody putting down the phone after I said "hello". Weird! I wonder who made that call on a Sunday. I might try checking online on my phone account. Let's see.