Got call on 9/10. Woman asking if they could put a small sign in my yard advertising their security system. They were looking for a "model home". Told me it was a legitimate company and just wanted to get some of my "info". I said, "Oh, no." and hung up. Caller id showed "Srvc Call".
Calling back w/*67 gives automated phone message claiming to be a telemarketing opt out service. More likely a phone number harvester. No indication about any official association with any particular organization (let alone a verifiable indication).