A few minutes ago (Thursday) at 0910 hours local time I was monitoring 154.265 being used in the repeater mode and a very long list of agencies, mainly governmental, were being called. These included law enforcement, fire and rescue, other local governmental entities, ARES/RACES and more. A few minutes later the same list of entities, totaling 29, were called on 851.0125. This appeared to be a test of established mutual aid frequencies available in Southern Nevada. They were heard well in Arizona. These two frequencies along with some others might be good to keep in your scanner. The net control station was only called "Control".