this number has called me twice now.  in a span of 5mins.  
no message.

Got the call X2 today.  Did not answer and they did not leave a message....assuming it was an offer I just could refuse to answer.

I just got a call from this number today.  I didn't answer and they didn't leave a message.  Probably was "selected for more free airmiles"  :P

this number has called me twice now.  in a span of 5mins.  no message.

Got call from this number twice today, didn't answer and hate to receive unknown calls.

"You have been selected for free air miles" or something to that effect. I have never used air miles. I also have never gotten one of these spam calls before. Very strange.