Encryption means frequencies in your area are blocked and NOT listenable.
There are 2 types of encryption:
- PARTIAL encryption
- Example: SWAT team, FBI, narcotics, etc.
- Use: Most areas have partial encryption
- FULL encryption
- Example: 100% of Pennsylvania State Police are encrypted
- Use: Few areas in the US have full encryption
There are no scanners available that can monitor encryption; there are no tricky loopholes to work around full encryption*.
If your area has partial encryption there are still plenty of monitorable frequencies—just not encrypted channels.
To find out, exactly, what you can and cannot monitor in your area checkout our Ultimate Encryption Guide.
*Breaking encryption codes is a federal offense.