It is a telecommunication/Energy Co. But, You can call back the number back and they will black-list your number.

A call came from this number asking if I was receiving utilities from a specific company. I asked who was calling and they repeated the question.  I asked what difference it made who I received my utilities from and they became very agitated and abusive in speech.  They asked the question again and I simply said "no" and they laughed and I could hear several other people in the room and then they hung up.