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1. Log in to your AWS account
2. Navigate to Billing and Cost Management → Cost Explorer
3. In Cost Explorer, set the Date Range as needed
   1. Set the Dimension of “API operation”
   2. Set the Usage type “USE1-PublicIPv4:IdleAddress (Hrs)” and “USE1-PublicIPv4:InUseAddress (Hrs)”
4. The above report parameters will return four values in "Usage (Hrs)"

   1. ‘AssociateAddressVPC’ = Elastic IP associated with a resource (an EC2 instance, or maybe other things like an NLB, etc.)

   2. ‘DescribeNetworkInterfaces’ = AWS managed service public IP

   3. ‘RunInstances’ = EC2 instance default (i.e. non-elastic) public IP

   4. ‘AllocateAddressVPC’ = Elastic IP that are idle in your account

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Announcement from AWS of the change and cost: https://aws.amazon.com/blogs/aws/new-aws-public-ipv4-address-charge-public-ip-insights/

How to identify usage: https://aws.amazon.com/blogs/networking-and-content-delivery/identify-and-optimize-public-ipv4-address-usage-on-aws/

Announcement to campus (login required): 2024-01-05 AWS Charges for Public IPv4 Addresses

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