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Ans: The default range is 172.31.0.0/16.
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We need to assign one single classless internet IP address block when we create a VPC. The address will be the subnet within the same VPC. One VPC can assign at most only one IP address. Currently, multiple IP addresses assigning is not allowed in AWS. If we try to create multiple IP addresses by overlapping, then AWS won’t give permission to connect with the same VPC. We are requesting to follow non-overlapping IP address ranges.