This number is spoofed - it appears to be one of my company's inside line numbers, but is not.  When I answered, I heard a recorded message saying it was "WestJet" and that I had won a prize, and to press "1" for more info.  I did not press any button of course, and hung up.  I have had calls from this fake WestJet before but from different numbers on my Call Display.  I have complained to WestJet about this before, but for some reason they do not seem concerned that some slimy person or organization is using their name in vain....