Create a VPC that uses an IPAM pool CIDR
Follow the steps in Creating a VPC in the Amazon VPC User Guide. When you reach the step to choose a CIDR for the VPC, you will have an option to use a CIDR from an IPAM pool.
If you choose the option to use an IPAM pool when you create the VPC, AWS allocates a CIDR in the IPAM pool. You can view the allocation in IPAM by choosing a pool in the content pane of the IPAM console and viewing the Resources tab for the pool.
For complete instructions using the AWS CLI, including creating a VPC, see the Tutorials section.
