name : create-subnet-cidr-reservation.rst **To create a subnet CIDR reservation** The following ``create-subnet-cidr-reservation`` example creates a subnet CIDR reservation for the specified subnet and CIDR range. :: aws ec2 create-subnet-cidr-reservation \ --subnet-id subnet-03c51e2eEXAMPLE \ --reservation-type prefix \ --cidr 10.1.0.20/26 Output:: { "SubnetCidrReservation": { "SubnetCidrReservationId": "scr-044f977c4eEXAMPLE", "SubnetId": "subnet-03c51e2e6cEXAMPLE", "Cidr": "10.1.0.16/28", "ReservationType": "prefix", "OwnerId": "123456789012" } } For more information, see `Subnet CIDR reservations <https://docs.aws.amazon.com/vpc/latest/userguide/subnet-cidr-reservation.html>`__ in the *Amazon VPC User Guide*.