403 is the code but you You should match the description of the error with the code that you are giving: if you say
Service not available in your area.
then you should give a 404 because you claim that the service is not available. if you say
You are not authorized for this service in your area.
if you say
Service not available in your area.then you should give a404because you claim that the service is not available.if you say
You are not authorized for this service in your area.then you should give a403because you claim that the caller is not authorized.
then you should give a 403 because you claim that the caller is not authorized. I'dI'd go for the second.