**Example 1: To describe all your subnets** The following ``describe-subnets`` example displays the details of your subnets. :: aws ec2 describe-subnets Output:: { "Subnets": [ { "AvailabilityZone": "us-east-1d", "AvailabilityZoneId": "use1-az2", "AvailableIpAddressCount": 4089, "CidrBlock": "172.31.80.0/20", "DefaultForAz": true, "MapPublicIpOnLaunch": false, "MapCustomerOwnedIpOnLaunch": true, "State": "available", "SubnetId": "subnet-0bb1c79de3EXAMPLE", "VpcId": "vpc-0ee975135dEXAMPLE", "OwnerId": "111122223333", "AssignIpv6AddressOnCreation": false, "Ipv6CidrBlockAssociationSet": [], "CustomerOwnedIpv4Pool:": 'pool-2EXAMPLE', "SubnetArn": "arn:aws:ec2:us-east-2:111122223333:subnet/subnet-0bb1c79de3EXAMPLE", "EnableDns64": false, "Ipv6Native": false, "PrivateDnsNameOptionsOnLaunch": { "HostnameType": "ip-name", "EnableResourceNameDnsARecord": false, "EnableResourceNameDnsAAAARecord": false } }, { "AvailabilityZone": "us-east-1d", "AvailabilityZoneId": "use1-az2", "AvailableIpAddressCount": 4089, "CidrBlock": "172.31.80.0/20", "DefaultForAz": true, "MapPublicIpOnLaunch": true, "MapCustomerOwnedIpOnLaunch": false, "State": "available", "SubnetId": "subnet-8EXAMPLE", "VpcId": "vpc-3EXAMPLE", "OwnerId": "1111222233333", "AssignIpv6AddressOnCreation": false, "Ipv6CidrBlockAssociationSet": [], "Tags": [ { "Key": "Name", "Value": "MySubnet" } ], "SubnetArn": "arn:aws:ec2:us-east-1:111122223333:subnet/subnet-8EXAMPLE", "EnableDns64": false, "Ipv6Native": false, "PrivateDnsNameOptionsOnLaunch": { "HostnameType": "ip-name", "EnableResourceNameDnsARecord": false, "EnableResourceNameDnsAAAARecord": false } } ] } For more information, see `Working with VPCs and Subnets <https://docs.aws.amazon.com/vpc/latest/userguide/working-with-vpcs.html>`__ in the *AWS VPC User Guide*. **Example 2: To describe the subnets of a specific VPC** The following ``describe-subnets`` example uses a filter to retrieve details for the subnets of the specified VPC. :: aws ec2 describe-subnets \ --filters "Name=vpc-id,Values=vpc-3EXAMPLE" Output:: { "Subnets": [ { "AvailabilityZone": "us-east-1d", "AvailabilityZoneId": "use1-az2", "AvailableIpAddressCount": 4089, "CidrBlock": "172.31.80.0/20", "DefaultForAz": true, "MapPublicIpOnLaunch": true, "MapCustomerOwnedIpOnLaunch": false, "State": "available", "SubnetId": "subnet-8EXAMPLE", "VpcId": "vpc-3EXAMPLE", "OwnerId": "1111222233333", "AssignIpv6AddressOnCreation": false, "Ipv6CidrBlockAssociationSet": [], "Tags": [ { "Key": "Name", "Value": "MySubnet" } ], "SubnetArn": "arn:aws:ec2:us-east-1:111122223333:subnet/subnet-8EXAMPLE", "EnableDns64": false, "Ipv6Native": false, "PrivateDnsNameOptionsOnLaunch": { "HostnameType": "ip-name", "EnableResourceNameDnsARecord": false, "EnableResourceNameDnsAAAARecord": false } } ] } For more information, see `Working with VPCs and Subnets <https://docs.aws.amazon.com/vpc/latest/userguide/working-with-vpcs.html>`__ in the *AWS VPC User Guide*. **Example 3: To describe the subnets with a specific tag** The following ``describe-subnets`` example uses a filter to retrieve the details of those subnets with the tag ``CostCenter=123`` and the ``--query`` parameter to display the subnet IDs of the subnets with this tag. :: aws ec2 describe-subnets \ --filters "Name=tag:CostCenter,Values=123" \ --query "Subnets[*].SubnetId" \ --output text Output:: subnet-0987a87c8b37348ef subnet-02a95061c45f372ee subnet-03f720e7de2788d73 For more information, see `Working with VPCs and Subnets <https://docs.aws.amazon.com/vpc/latest/userguide/working-with-vpcs.html>`__ in the *Amazon VPC User Guide*.