Tagging White listed numbers

Is it possible to tag incoming calls with a warning?
Within our spam filtering our company messaging (outlook/exchange) it is possible to tag an email that is coming from an external sender, not from someone inside the company.

Would it be possible to do the same thing with incoming calls from countries that have been added to our whitelist? This might be a good security utility to alert our users when a call comes from a Whitelisted number, to be aware it could possibly be a scam.