Who called from 2533366579

I have been receiving calls from this phone number, they do not leave a message.  I am on the do not call registry

Four calls, no message, just "musik" when you call it.

Same as the others receiving this callers annoyance.  No message left.  Music when I call back.  We also are on the Do Not Call Registry.  However it is not an 800 number.  How can we stop this?

you need a call blocker,or a Panasonic phone with caller ID