This is a scam. they say they are from sirrus radio, but every time they call....five minutes before is a fake call for microsoft tech support. They call you first from a call center, to see if you are home. next they call you and try to get you to prepay for sirrus radio. THIS IS A SCAM!
I receive at least one call from this number every day.
I've never answered the call and they never leave a message. This alone should be enough reason to be wary of calls from this telephone number.