A phone number identified as 1234567890 keeps calling me.?

Question

1234567890 Keeps calling me, I don't even know how they got my number. I haven't yet answered, due to the thought of a scam. I've looked it up on Google and on several websites, people are saying they've been:
•An Indian guy who works with Windows or Microsoft
•Prank Callers
•PRIMUS Canada
•Credit Card Company
Please help, I'm so confused .-.

Answer 1

It is VERY easy to scam caller ID boxes. They use a different technology then what the phone company uses to track and log phone calls for billing. A company can basically set any number they want to show up on their outgoing caller ID, so these calls can be from anyone. Your best course of action is to just continue to not answer them.