This assumes you have already configured the aws command line tool. If not, check out my article on Getting Started with the AWS CLI.

The aws ec2 describe-addresses command can be used to return JSON that lists the IP addresses associated with your EC2 instances.

aws ec2 describe-addresses

And here is an example of how to limit the output using the --query option.

aws ec2 describe-addresses --query 'Addresses[?PublicIp==`107.14.151.201`]'

In this example, some configurations have been set.

{
    "Addresses": [
        {
            "PublicIp": "107.14.151.201",
            "AllocationId": "eipalloc-08f7123469aafbabf",
            "AssociationId": "eipassoc-0d1c511234ba5abab",
            "Domain": "vpc",
            "NetworkInterfaceId": "eni-03c87e123420abab3",
            "NetworkInterfaceOwnerId": "954001234672",
            "PrivateIpAddress": "10.25.10.7",
            "Tags": [
                {
                    "Key": "Name",
                    "Value": "My EC2 Instance"
                }
            ],
            "PublicIpv4Pool": "amazon",
            "NetworkBorderGroup": "us-east-2"
        }
    ]
}