keeps calling, don't recognize number so I turn off ringer and let it go to VM spontaneously, no message left. Starts at 9 am and continues during business day, fortunately don't call after dark. Apparently based on one of other sites landline carrier is MCI WorldCom from ATL

Same thing for me.  Must have called 15 times over the last 36 hours.

Yea same thing here.....I'm not answering it and they refuse to leave a message.  Must not be too important.

Blocked still trying my number as of Feb 2017. Nice to know others have had same experience.

Got a call from this number today asking for me by name. When I said asked “Who is calling please?” She said “Secure.” When I asked “Secure what?” she got snippy and said that was her company name. I said, “How can I help you?” and she hung up. Maybe a scammer?