Yes, with matelso Source Based Routing
What is the Source Based Routing?
With source-based routing, various caller sources can be fed to certain defined routing profiles. E.g. Callers from Germany are automatically routed to a German service, and other countries to an English service.
Using the same principle, anonymous callers can be forwarded to an answering machine, for example. In this way, certain area codes are also forwarded to regional offices. The possibilities are manifold.
Depending on the caller's country of origin, forward to the appropiate destination:
Directly forward anomymus callers to voicemail:
More information on configuring sourcebased routing in the control panel:
How to set up source based routing in control panel