A robocall from unknown. A search shows this number to be from Boulder, Colorado. A land line with a spam score of 97%. When you call the number back, a recording says, you have reached win Las Vegas. The number you are trying to reach is not in service.
Offered home security monitoring. When the representative asked me if I pressed '1' to hear more information, I responded with "I did" (instead of "yes"), and he immediately hung up.