I just had a call from this number, but they only let it ring three times so they'd hung up by the time I found the (cordless) phone.

i picked up after 4 rings... no answer on other end.

The only way I could get rid of this obnoxious caller (a male speaking very quickly in what appeared to be an East Indian accent) was to hang up. He did know my name. My usual "I'm not interested" got me nowhere. I called my provider, Shaw, and they don't do anything about this sort of nuisance calling, so they told me to block the number.
I then registered a complaint with the CRTC @: https://www.lnnte-dncl.gc.ca/plt-cmp-eng
If enough of us register, perhaps they'll do something about it, though I'm not optimistic. I've been receiving even more of these calls in the last two months, not fewer.

Called and when I picked up and answered with my company name they just hung up.

they called me and asked if I wanted 2 plane trips to las vegas. Is this possible?

They called me quite a few times, from this number and from a hidden one. Same voice. Report this number to Phone Busters, the RCMP anti-fraud call centre:  (1-+1 888-495-8501) http://www.phonebusters.com/english/index.html.