I've had numerous calls from this number all week, even earlier this morning, but they never leave a message.  Furthermore, it's always two, three or four times during the day, as early as 8 a.m., but no message!  Went ahead and blocked the number, so it'll ring once here, but they'll get the message that the number is blocked.  It's a Panasonic landline phone system with two cordless phones that I bought at Radio Shack several years ago, so I can block up to 30 numbers, with no number/no caller i.d. numbers automatically blocked!  Has to be scammers...