Check for Unattached Static External IP Addresses

01 Sign in to Google Cloud Management Console.

02 Select the Google Cloud Platform (GCP) project that you want to examine from the console top navigation bar.

03 Navigate to VPC Network console available at https://console.cloud.google.com/networking.

04 In the navigation panel, select IP addresses to access the list of external IP addresses provisioned for the selected GCP project.

05 Select the EXTERNAL IP ADDRESSES tab, click inside the Filter box and set Type to Static to list only the static external IP addresses reserved for the selected project.

06 Choose the external IP address that you want to examine and check the association status available in the In use by column. If the association status is set to None, the selected static external IP address is reserved but is not being used, therefore, the IP address is not associated with a cloud resource and can be safely removed from your Google Cloud project.

07 Repeat steps no. 2 – 6 for each GCP project deployed in your Google Cloud account.

01 Run projects list command (Windows/macOS/Linux) using custom query filters to list the IDs of the Google Cloud Platform (GCP) projects currently available in your cloud account:

gcloud projects list
  --format="table(projectId)"

02 The command output should return the requested GCP project identifiers (IDs):

PROJECT_ID
cc-project5-stack-12341234
cc-web-mobile-stack-12341234

03 Run compute addresses list command (Windows/macOS/Linux) using the ID of the GCP project that you want to examine as the identifier parameter and custom query filters to list the name of each static external IP address available within the selected project:

gcloud compute addresses list
  --project cc-project5-stack-12341234
  --filter="addressType:EXTERNAL"
  --format="table(name,region)"

04 The command output should return the name(s) of the external IP address(es) created for the specified project:

NAME: cc-production-instance-static-ip
REGION: us-central1

NAME: cc-project5-load-balancer-static-ip
REGION: us-central1 

05 Run compute addresses describe command (Windows/macOS/Linux) using the name of the static external IP address that you want to examine as the identifier parameter, to describe the association status set for the selected external IP address:

gcloud compute addresses describe cc-production-instance-static-ip
  --region=us-central1 
  --format="value(status)"

06 The command output should return the requested status (IN_USE for used and RESERVED for unused):

RESERVED

07 Repeat steps no. 5 and 6 for each IP address provisioned for the selected GCP project.

08 Repeat steps no. 3 – 7 for each GCP project deployed in your Google Cloud account.

01 Sign in to Google Cloud Management Console.

02 Select the Google Cloud Platform (GCP) project that you want to examine from the console top navigation bar.

03 Navigate to VPC Network console available at https://console.cloud.google.com/networking.

04 In the navigation panel, select IP addresses to access the list of external IP addresses provisioned for the selected GCP project.

05 Select the EXTERNAL IP ADDRESSES tab, click inside the Filter box and set Type to Static to list only the static external IP addresses reserved for the selected project.

06 Select the static external IP address that you want to delete and choose RELEASE STATIC ADDRESS.

07 In the confirmation box, choose RELEASE to remove the specified external IP address from your GCP project.

08 Repeat steps no. 2 – 7 for each project created within your Google Cloud account.

01 To avoid unnecessary charges on your Google Cloud bill, you can release (delete) unused static external IP addresses. To release an external IP address from your GCP project, run compute addresses delete command (Windows/macOS/Linux):

gcloud compute addresses delete cc-production-instance-static-ip
  --region=us-central1
  --project cc-project5-stack-12341234

02 Type Y and press Enter to confirm the IP resource removal:

The following addresses will be deleted:
  - [cc-production-instance-static-ip] in [us-central1]
Do you want to continue (Y/n)?  Y

03 The command output should return the full URL of the deleted IP address:

Deleted [https://www.googleapis.com/compute/v1/projects/cc-project5-stack-12341234/regions/us-central1/addresses/cc-production-instance-static-ip].

04 Repeat steps no. 1 – 3 for each GCP project deployed in your Google Cloud account.