Here are some ways you can listen to police, fire, EMS, aircraft, and rail broadcast for free without a police scanner. You can listen to it on your cell phone or on the computer.

Online / Desktop
​Go to Broadcastify to listen in on what is going on in your town

iPhone / iPod / iPad App
Search and download the 5-0 Radio Police Scanner Lite for free

Android App
Search and download the​ Police Scanner Radio Scanner for free

Reference Sheet
Link to Police Scanner code reference
187 – Homicide
211 – Robbery
311 – Indecent exposure
390 – Drunk
510 – Speeding or racing vehicles
586 – Illegal parking
604 – Throwing missiles?!