I missed a call from a number I didn't recognize, but it was from area code 302 - Delaware, where my parents live.
Reverse lookup came up as the hospital nearest their house.
Texted and called my mom's cell, no answer... called their house, straight to VM... called the number that called me, call didn't go through....
then that 302 number called me back - it was the radiologist's office calling to confirm "my" appointment at 10AM this morning. (first of all - who calls to confirm half an hour before the appointment?)
then it became clear - that's my dad's appointment, and it looks like they accidentally called an emergency contact number. Scared the hell out of me. As soon as I figured it out, my mom texted that they'd just arrived at the office.