It turned out that a search warrant wasn’t necessary to trace a phone call made to your own telephone, so long as you wanted the trace made. This made sense. You shouldn’t need a court order to find out who was calling you. Indeed, some telephone companies now sell phones that display the digits of the calling telephone as your phone is ringing.
"some telephone companies now sell phones that display the digits of the calling telephone as your phone is ringing." WOW!!

