Here's some prepper net frequencies: 14.242 MHz USB, 7.242 MHz LSB, 5.357 MHz LSB, and 3.818 MHz LSB. You might also want to check out the National Hurricane Net on 14.325 MHz USB. Some other interesting frequencies include 8.992 MHz USB, 11.175 MHz USB, 13.200 MHz USB, and 15.016 MHz USB, which are U.S, military Emergency Action Message frequencies. Usually the EAMs are one way coded messages, how often they occur could indicate an ongoing training exercise, or an actual military operation.