I received a call from this number at 9:06 AM, my caller ID showed Prairie Voice S. When I answered, no one was there. I did have Comcast to my home, yet again, yesterday.
Just an update on what I wrote above - A little while later, I received a call from Comcast inquiring about the repairs that where made. I told this rep about the phone call from 402-220-0375. He was aware that Comcast uses a company to conduct surveys after technicians have worked. I told him about the comments on this page indicating that when a call is received, no message is left. He will be reporting this to Comcast so maybe this won't be a problem in the future.