It is possible to listen to police radio frequencies for free using the Broadcastify service. This website also allows users to listen to fire, EMS, railroad and aircraft frequencies. It is also possible to download a mobile app for iPhone, Android, Windows and Blackberry devices, according to Broadcastify.com.
To find a police frequency to listen to, users visit the Broadcastify home page, click listen, and then choose a state from the map of the United States. After choosing a state, another map appears that shows counties with live frequencies. Users can click on a county to view all of the active police frequencies in the area. The frequencies are available in a Web player, Windows Media Player, iTunes, Real Player and other formats, states Broadcastify.com.