When may I change my transponder code to 1200 when being handled by ATC? When am I allowed to change my transponder code to 1200?
Is it after clearing the boundary of regulatory airspace (ie. airspace requiring radio contact and an operating transponder)?
ATC will tell you something like, &quot;N1234R radar service terminated. Squawk VFR. Frequency change approved; good day&quot; which you will repeat back as an instruction.
You do not change from the assigned transponder code until instructed.
If you're in a hurry to get away from ATC, you may request to terminate radar service as soon as you are out of their regulatory airspace.