Leaving the Control Zone: The Final Report

Example in German (shown in translation):

Leaving Control Zone Linz

Vienna Departure · OE-CMV

PILOT: "OE-CMV, leaving Control Zone two thousand feet."
ATC "OE-CMV, cleared, you may leave the frequency " [Pilot switches off the frequency or monitors for further traffic]
Example in English:

Leaving Control Zone Vienna

Vienna Departure · D-EFGH

PILOT: "D-EFGH, leaving Control Zone three thousand feet."
ATC "D-EFGH, ROGER, you may leave the frequency " [Pilot adjusts radio and continues flight plan]
Once you have been cleared to leave the frequency, you have successfully transitioned from the controlled aerodrome environment to en-route operations. You are now responsible for self-separation from other traffic and for maintaining awareness of your position relative to controlled airspace.