In FIR EPWW we have class G uncontrolled airspace.
Uncontrolled class G airspace includes airspace from GND to FL095 outside controlled airspace and flexible airspace elements (TSAs/TRAs/TFRs/MRTs), unless they were classified as class G airspace.
ATZ - Air Traffic Zones falls under class G airspace.
Outside ATZs in class G airspace FIS - Flight Information Service is provided.