Ummm unscannable??? What freqs are unscannable???? Unless its a iDen Digital Motorola system, VSELP Digital Motorola system, an EDACS Provoice Digital M/A-Com system,.. TETRA, OpenSky, or the like.... most of your top of the line scanners will scan anything from the KHz ranges, up to 2. something GHz. If your referring to the 70 MHz stuff.. thats scannable with the right scanners......