seems to be a calling card number

They called again and my mom picked up, luckily I was home and told her to hang up and I finally said mom hang up it's a scam.

The lady said my parents name and then said I'm calling on behalf of comcast.  We hung up then.

Right after that another number came up as +1 800-860-0412.  On the caller id it says 800 number.

This is getting agitating, because I've been getting a lot of these calls.

Primus Canada for my home phone. Calling me to remind me to change my credit card which expires in a month.

I figured everything out. I just purchased a $5 Global Saver card from waytelecom.ca . Used their Toll Free Access number and dialed from two different cell phone providers Bell Canada and Telus. One showing unknown and other is showing (416) 646-3601. It looks like Mobile providers is spoofing the number for some reason. I can understand, they are loosing long distance business to Way Telecom, but why spoof the number?

P.S.
Way Telecom does offer pretty cheap long distance calls.

This number called my cell phone  this evening at 8:45 pm, I had missed the call so I called it back, all I got was a dial tone.

Got a call today.  I didn't pick up, and they didn't leave a message.  I called it back, but got a loud buzzing sound (i.e. it didn't ring).