Called my mobile. Didn't answer as I was at work. I don't know anyone in Canada.

these people (sounded like there was more than one) called me and just said "hello" over and over again. i think i heard laughing in the background too... tried calling it back "the number you have called is no longer in service".all i wanna know is how the hell they got my cell phone number

On my display, it showed sialk.ca

This number has called multiple times the last couple of days.  Mostly shows up as 'unknown name', but did come up one time as 'sialk.ca' who appear to be a long distance reseller.I finally did answer a call since the constant callbacks were annoying.  A woman asked for me by name and told me that Yak Communications asked her to call to give me a special money saving offer.  I cut her off indicating that the phone muber is on the National Do Not Call List, and asked they not call anymore.  Hopefully they will stop calling.

I also received a call from this number, and it was a voice I couldn't recognize, and then it hung up.  Doing some research, I have also read comments that it ended up being a person's mom (above) and another saying it was an uncle calling from the middle east.  

This implies to me that this is an outdial number for a discount long distance brokerage, and it's being reported as (416) 555-7777.

It would be interesting if someone, who actually recognizes / knows the caller, were to ask which long distance company / discount company that they made the call via.

The scammers that are calling are probably using the same long distance discount company to place their scam calls.

Online pharmacy wanting me to 'refill a prescription'. ?When I informed them that this was my work number and I wished to be removed from his list, he hung up.