Explanation: By default, all AWS accounts are limited to 5 Elastic IP addresses per region for each AWS account,because public (IPv4) Internet addresses are a scarce public resource. AWS strongly encourages youto use an EIP primarily for load balancing use cases, and use DNS hostnames for all other inter-nodecommunication. If you feel your architecture warrants additional EIPs, you would need to complete the Amazon EC2Elastic IP Address Request Form and give reasons as to your need for additional addresses. Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.html#usinginstance-ad dressing-limit