Who called from 4087334373

Received call, did not answer. Did search, number is spoofed.

Called. left no message

Called. No message. When I called back, said, "You've reached a # that has been disconnected."

Just got a call from this number as well.  Didn't answer, no message, blocked.

The CID says Sunnyvale CA.  I made the mistake of picking the phone up because I have a friend who lives there and said "Hello." and  was answered with "goodbye.,"  I am sure that I can expect a round of scam calls now since they were fishing for live numbers. Uhg.