Create a static IP.

gcloud compute addresses create your-app-static-ip \
--region us-central1

List static IP.

gcloud compute addresses list your-static-ip-name --region us-central1
# or
gcloud compute addresses list --filter="name=('live-tfc-static-ip-address')"

Release static IP.

gcloud compute addresses delete your-app-static-ip \
--region us-central1