caller said nothing

i received a call today from (416) 555-7777 he sounded Indian as well, mumbled something then hung up, when I called back the number was no longer in service. Do any of you use facebook? it was recently hacked and it does often post your cell/home number you enter into it. Mine was my cell phone so i'm assuming that someone got it from there. Just an Idea.

On my display, it showed sialk.ca

I got a call from this number, but no one said anything.

Got a call today and someone was just breathing.  I tried to call it back and number is not in service!  pretty wierd, i called bell and they said it is not a registered number but it might be an online call from skype or something

I received 2 calls from this number, one after the other.  It was an Indian man.  He was offering duct cleaning for $100.00.  When I said I wasn't interested, he insisted I should take his offer.  I told him I was on the "Do not call list" and he should know about that, and he didn't care.  He wanted me to take his offer.  I put down the phone.