Listen to Arizona Department of Public Safety - District 4

Arizona Department of Public Safety - District 4 is a Public Safety scanner feed covering Maricopa County, Arizona. Expect a mix of dispatch traffic as calls come in, along with units reporting their status.

Yes. Listening to Arizona Department of Public Safety - District 4 in the Scanner Radio app is free on both iPhone and Android.

Scanner Radio lists 21 other scanners in Maricopa County, Arizona, including AI7HE AllStar Node, Arizona Department of Public Safety - Metro Central and Arizona DPS - Highway Patrol Metro Phoenix West. You can see all scanners in Maricopa County on the area page.

Scanner traffic comes in bursts, so a silent stretch usually just means a quiet moment on the channel. If the feed itself is down, it is usually for maintenance and typically comes back on its own.

In Scanner Radio, turn on push notifications to hear when listener numbers on a feed suddenly spike, which is often the first sign of a major incident, or when there is a big breaking news story.

Dispatchers use 10-codes, signal codes and unit numbers as shorthand. Scanner Radio includes a built-in 10-code reference so you can follow along. Police Scanner Codes Explained: The Complete 10-Code Guide.