I received a call from this number just today and they didn't leave a message. The number showed on my caller ID. I tried to call them to see who they are, but a recording said the number was not in service and gave a code - I100. They had just called my house, so I don't know how the number isn't in service. It could be that they have some way of showing a different number than the one they are actually calling from? It is disturbing.