Calls and hangs up after 4 rings

i keep getting calls from this number in markham

whats up?

Go travel.  

My husband asked how they got our name and number and they couldn't give a straight answer.  They want your business yet they don't want to be honest.

Avoid answering.

Call with no body on the other end.

Enough...... Damn annoying, calls every single night, no-one at other end.