In GC Platform generally Static Public IP is an option, but the instances that are created when 3CX is hosting it for you will not, it will always be "Ephemeral" as Google calls it. That is why the Public IP type in the 3CX Management Console should be set to "Dynamic".Is there any way to set a static IP, and access Google Cloud Platform with "Let 3CX host you" slected during installation of 3cx pbxexpress?
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.