These #!%$!%#@$^ jerks have a new tactic: spoofing a call from your own area code and your own exchange, to make you think it may be someone you know.  I never answer the phone when I get a call from a number I don't recognize; if later I call back the number is invariably "not in service."  I guess they mine the exchange for unused numbers and spoof those.
Sometimes a name will show up, too: it's always NOT the name of the person whose number is being spoofed, because the spoofed number doesn't exist.