I did not know the number so I declined the call.  No message was left.  I called the number back and it said "the survey you were called for has now finished"... blocking this number

Calls with no message left.  Blocked.

Why calling back a number when you suspect that it is a "doubtful" caller? So "the survey you were called for has now finished"? Sorry, Cherryboot, you missed it, but may be next time you will be able to get that survey, and remember that "Curiosity killed the cat". Cheers!

(424) 287-2413. Not a familiar number, so I did not answer,  and most important, they left no message which indicates that it was not a "legitimate" call.

Nuisance call+1 (424) 287-5113