**Example 1: To create a subnet with an IPv4 CIDR block only**
The following ``create-subnet`` example creates a subnet in the specified VPC with the specified IPv4 CIDR block. ::
aws ec2 create-subnet \
--vpc-id vpc-081ec835f3EXAMPLE \
--cidr-block 10.0.0.0/24 \
--tag-specifications ResourceType=subnet,Tags=[{Key=Name,Value=my-ipv4-only-subnet}]
Output::
{
"Subnet": {
"AvailabilityZone": "us-west-2a",
"AvailabilityZoneId": "usw2-az2",
"AvailableIpAddressCount": 251,
"CidrBlock": "10.0.0.0/24",
"DefaultForAz": false,
"MapPublicIpOnLaunch": false,
"State": "available",
"SubnetId": "subnet-0e99b93155EXAMPLE",
"VpcId": "vpc-081ec835f3EXAMPLE",
"OwnerId": "123456789012",
"AssignIpv6AddressOnCreation": false,
"Ipv6CidrBlockAssociationSet": [],
"Tags": [
{
"Key": "Name",
"Value": "my-ipv4-only-subnet"
}
],
"SubnetArn": "arn:aws:ec2:us-west-2:123456789012:subnet/subnet-0e99b93155EXAMPLE"
}
}
**Example 2: To create a subnet with both IPv4 and IPv6 CIDR blocks**
The following ``create-subnet`` example creates a subnet in the specified VPC with the specified IPv4 and IPv6 CIDR blocks. ::
aws ec2 create-subnet \
--vpc-id vpc-081ec835f3EXAMPLE \
--cidr-block 10.0.0.0/24 \
--ipv6-cidr-block 2600:1f16:cfe:3660::/64 \
--tag-specifications ResourceType=subnet,Tags=[{Key=Name,Value=my-ipv4-ipv6-subnet}]
Output::
{
"Subnet": {
"AvailabilityZone": "us-west-2a",
"AvailabilityZoneId": "usw2-az2",
"AvailableIpAddressCount": 251,
"CidrBlock": "10.0.0.0/24",
"DefaultForAz": false,
"MapPublicIpOnLaunch": false,
"State": "available",
"SubnetId": "subnet-0736441d38EXAMPLE",
"VpcId": "vpc-081ec835f3EXAMPLE",
"OwnerId": "123456789012",
"AssignIpv6AddressOnCreation": false,
"Ipv6CidrBlockAssociationSet": [
{
"AssociationId": "subnet-cidr-assoc-06c5f904499fcc623",
"Ipv6CidrBlock": "2600:1f13:cfe:3660::/64",
"Ipv6CidrBlockState": {
"State": "associating"
}
}
],
"Tags": [
{
"Key": "Name",
"Value": "my-ipv4-ipv6-subnet"
}
],
"SubnetArn": "arn:aws:ec2:us-west-2:123456789012:subnet/subnet-0736441d38EXAMPLE"
}
}
**Example 3: To create a subnet with an IPv6 CIDR block only**
The following ``create-subnet`` example creates a subnet in the specified VPC with the specified IPv6 CIDR block. ::
aws ec2 create-subnet \
--vpc-id vpc-081ec835f3EXAMPLE \
--ipv6-native \
--ipv6-cidr-block 2600:1f16:115:200::/64 \
--tag-specifications ResourceType=subnet,Tags=[{Key=Name,Value=my-ipv6-only-subnet}]
Output::
{
"Subnet": {
"AvailabilityZone": "us-west-2a",
"AvailabilityZoneId": "usw2-az2",
"AvailableIpAddressCount": 0,
"DefaultForAz": false,
"MapPublicIpOnLaunch": false,
"State": "available",
"SubnetId": "subnet-03f720e7deEXAMPLE",
"VpcId": "vpc-081ec835f3EXAMPLE",
"OwnerId": "123456789012",
"AssignIpv6AddressOnCreation": true,
"Ipv6CidrBlockAssociationSet": [
{
"AssociationId": "subnet-cidr-assoc-01ef639edde556709",
"Ipv6CidrBlock": "2600:1f13:cfe:3660::/64",
"Ipv6CidrBlockState": {
"State": "associating"
}
}
],
"Tags": [
{
"Key": "Name",
"Value": "my-ipv6-only-subnet"
}
],
"SubnetArn": "arn:aws:ec2:us-west-2:123456789012:subnet/subnet-03f720e7deEXAMPLE"
}
}
For more information, see `VPCs and subnets <https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Subnets.html>`__ in the *Amazon VPC User Guide*.