This number called my DNC listed landline today at 1220 hours. As it was an unfamiliar number and scam artists recently have shown a trend for calling around lunch time, I just picked up the phone slightly and slammed it right back into its receiver. I blocked my number and called the number back. I immediately got a message saying the phone number has been disconnected so obviously it's a scam artist spoofing an invalid number. From my brief research, it appears the number used to belong to a company called Supreme Advertising but that's apparently no longer the case.
These idiots called me again, this time today at 1235 hours. They're nothing if not consistent - and persistent. I still have no idea who they are or what scam they're trying to pull.