Who called from 7043648969

Hung up when I answered, tried to call back & says it's a wrong number

Received a call at work from this number.  When I called back the number was disconnected.

Same thing with me. Concerned that they knew my work number considering my security clearance level. I'll be researching.

Same here. Caller asked for me by name, when I said yes, he hung up. When I called back, it was disconnected.

Just called my work saying Dr. Lee's office and asked for me by name.  I did not call the number back.