I am not very knowledgeable about radio scanner but I recently used an app where I can listen to police scanners worldwide and locally and it has a section where i can input the feed URL. I wanted to listen to other local frequencies and i have the dec and hex number thingies but there's no URL for them on radioreference.com so does that mean I can't pick them up on my iphone? Is there a better app out there? If not if i bought a used scanner would it pick them up? the site said they have some kinda 800 banding something. Is it wrong to listen to these frequencies?