Multiple calls with no messages

201-215-0894 has called my phone multiple times and has left no message or contact information besides the number in the caller ID. The number has now contacted a friend of mine also with no message or contact information besides the number in the caller ID. I've messaged this number asking who it is with no response. I searched the number and paetec communications came up. I was wondering if you could give me any information on this number who is calling me. Thank you.