| _key | core | string | |
| account_id | core | string | |
| assign_ipv6_address_on_creation | core | bool | Indicates whether a network interface created in this subnet (including a network interface created by <a>RunInstances</a>) receives an IPv6 address. |
| availability_zone | core | string | The Availability Zone of the subnet. |
| availability_zone_id | core | string | The AZ ID of the subnet. |
| available_ip_address_count | core | int64 | The number of unused private IPv4 addresses in the subnet. The IPv4 addresses for any stopped instances are considered unavailable. |
| block_public_access_states | core | json | The state of VPC Block Public Access (BPA). |
| cidr_block | core | string | The IPv4 CIDR block assigned to the subnet. |
| customer_owned_ipv4_pool | core | string | The customer-owned IPv4 address pool associated with the subnet. |
| default_for_az | core | bool | Indicates whether this is the default subnet for the Availability Zone. |
| enable_dns64 | core | bool | Indicates whether DNS queries made to the Amazon-provided DNS Resolver in this subnet should return synthetic IPv6 addresses for IPv4-only destinations. |
| enable_lni_at_device_index | core | int64 | Indicates the device position for local network interfaces in this subnet. For example, <code>1</code> indicates local network interfaces in this subnet are the secondary network interface (eth1). |
| ipv6_cidr_block_association_set | core | json | Information about the IPv6 CIDR blocks associated with the subnet. |
| ipv6_native | core | bool | Indicates whether this is an IPv6 only subnet. |
| map_customer_owned_ip_on_launch | core | bool | Indicates whether a network interface created in this subnet (including a network interface created by <a>RunInstances</a>) receives a customer-owned IPv4 address. |
| map_public_ip_on_launch | core | bool | Indicates whether instances launched in this subnet receive a public IPv4 address. Amazon Web Services charges for all public IPv4 addresses, including public IPv4 addresses associated with running instances and Elastic IP addresses. For more information, see the <i>Public IPv4 Address</i> tab on the <a href="http://aws.amazon.com/vpc/pricing/">Amazon VPC pricing page</a>. |
| outpost_arn | core | string | The Amazon Resource Name (ARN) of the Outpost. |
| owner_id | core | string | The ID of the Amazon Web Services account that owns the subnet. |
| private_dns_name_options_on_launch | core | json | The type of hostnames to assign to instances in the subnet at launch. An instance hostname is based on the IPv4 address or ID of the instance. |
| state | core | string | The current state of the subnet. |
| subnet_arn | core | string | The Amazon Resource Name (ARN) of the subnet. |
| subnet_id | core | string | The ID of the subnet. |
| tags | core | hstore | |
| vpc_id | core | string | The ID of the VPC the subnet is in. |
