Have received a total of 4 calls from 312-667-2449 (at 6:06 PM and 6:37 PM on 10/15/15; and at 3:06 PM and 4:24 PM on 10/18/15), shown on CID as: "Chicago IL".  All calls were picked up by our answering machine, and there were never any messages left, which just confirms that they are scam/spoof/sales calls of some type (legitimate callers would leave a message!).  We HATE these calls, and wish that they would STOP!