robocall on my landline from  651-968-4485 caller ID said "UNKNOWN NAME" on Monday 7-25-16 @ 1002 AM

rang twice and I picked up said hello and there was only dead air.

called the number back with *67 and got message -
"the number you called is not in service or is asigned in a different area code.
Please check the number and try again...."
Can you say SCAM?
maybe MN solutions SCAM (their preferred SCAM area code is 763) ??

received a call, but no voice message was left

multiple calls from this number, but never any voicemail left.
caller id:  Minneapolis MN

Call from unknown. 651- 968-4485.  Sick of these unknown calls.

called and left no message. Phone number is not in service, same old bunch of low life scammers.