This is a magical query for tracking down all internal resources connecting to or from external IPs and Countries
src!=10.0.0.0/8 AND src!=192.168.0.0/12 AND src!=192.168.0.0/16 action="allowed" | iplocation src | search Country=* | table Country, src, action, bytes_out, packets_out | dedup src | sort Country
Your second src! criteria should be 172.16.0.0/12
thanks for the catch