This number called me twice today and once a day for the last week or so.  NO idea who this is and they NEVER leave a message of any kind (I won't answer a call from an unknown).

Keeps calling a lot no message left

Same here; it's on my work phone, and when I've tried to call back to find out who keeps calling and leaving no message, it said the mailbox was full. I can well believe it!

I receive a call from this number every day with no message.