White Pages ( another telephony boondoggle) says that this is an invalid number
Actually its a leftover from the the old WATS service but it doesnt call return
THE guy is running an IRS Scam report your numbers to the IRS immediately
4:04 am call. Message left: "Re: A legal status of your account. Recently instructed by the Attorney General of your state, this must be resolved immediately. Call (in a suddenly cheery voice) 435-374-4984. You must call back RIGHT NOW! (In a more stern voice.) Caller ID = "Invalid number".