GCP Internal IPs by Subnet

A utility to list all internal IPs reserved or in-use for all service projects, i.e. projects using a shared VPC, grouped by subnet. This includes IPs used by GCE instances, forwarding rules, and IPs that have been reserved but not in use.

Link: https://github.com/GoogleCloudPlatform/professional-services/tree/main/tools/gcp-ips