-

[fedora@ip-10-0-1-16 ~]$ aws ec2 create-subnet --vpc-id vpc-fc1d019e --cidr-block 10.0.2.0/24
{
    "Subnet": {
        "VpcId": "vpc-fc1d019e",
        "CidrBlock": "10.0.2.0/24",
        "State": "pending",
        "AvailabilityZone": "us-west-1b",
        "SubnetId": "subnet-3a0d227c",
        "AvailableIpAddressCount": 251
    }
}