Call repeatedly. All hours. One of several numbers used. No name, claims to be " Colorado Springs" but is not. Trace says it is western Colorado cities. No message. Just losers who violate DNC. If it was actually important or valid, they would leave some sort of message and not use several bogus numbers. If we don't know the number, we do not answer it. Period. That is what an answering machine/service is for, for legitimate calls to leave legitimate messages.