diff --git a/agent/handlers/v4/response.go b/agent/handlers/v4/response.go
index e563078d2d4..a0e926e1a4d 100644
--- a/agent/handlers/v4/response.go
+++ b/agent/handlers/v4/response.go
@@ -14,8 +14,6 @@
 package v4
 
 import (
-	"net"
-
 	"github.com/aws/amazon-ecs-agent/agent/api"
 	apitask "github.com/aws/amazon-ecs-agent/agent/api/task"
 	"github.com/aws/amazon-ecs-agent/agent/containermetadata"
@@ -168,12 +166,6 @@ func toV4NetworkResponse(
 // task.
 func newNetworkInterfaceProperties(task *apitask.Task) (NetworkInterfaceProperties, error) {
 	eni := task.GetPrimaryENI()
-	_, ipv4Net, err := net.ParseCIDR(eni.SubnetGatewayIPV4Address)
-	if err != nil {
-		return NetworkInterfaceProperties{}, errors.Wrapf(err,
-			"v4 metadata response: unable to parse subnet ipv4 address '%s'",
-			eni.SubnetGatewayIPV4Address)
-	}
 
 	var attachmentIndexPtr *int
 	if task.IsNetworkModeAWSVPC() {
@@ -186,7 +178,8 @@ func newNetworkInterfaceProperties(task *apitask.Task) (NetworkInterfaceProperti
 		// `Index` field for an ENI, we should set it as per that. Since we
 		// only support 1 ENI per task anyway, setting it to `0` is acceptable
 		AttachmentIndex:          attachmentIndexPtr,
-		IPV4SubnetCIDRBlock:      ipv4Net.String(),
+		IPV4SubnetCIDRBlock:      eni.GetIPv4SubnetCIDRBlock(),
+		IPv6SubnetCIDRBlock:      eni.GetIPv6SubnetCIDRBlock(),
 		MACAddress:               eni.MacAddress,
 		DomainNameServers:        eni.DomainNameServers,
 		DomainNameSearchList:     eni.DomainNameSearchList,
diff --git a/agent/handlers/v4/response_test.go b/agent/handlers/v4/response_test.go
index c88c38a1b8b..c32b2e441ec 100644
--- a/agent/handlers/v4/response_test.go
+++ b/agent/handlers/v4/response_test.go
@@ -45,6 +45,9 @@ const (
 	cpu                      = 1024
 	memory                   = 512
 	eniIPv4Address           = "192.168.0.5"
+	ipv4SubnetCIDRBlock      = "192.168.0.0/24"
+	eniIPv6Address           = "2600:1f18:619e:f900:8467:78b2:81c4:207d"
+	ipv6SubnetCIDRBlock      = "2600:1f18:619e:f900::/64"
 	subnetGatewayIPV4Address = "192.168.0.1/24"
 	volName                  = "volume1"
 	volSource                = "/var/lib/volume1"
@@ -73,6 +76,11 @@ func TestNewTaskContainerResponses(t *testing.T) {
 						Address: eniIPv4Address,
 					},
 				},
+				IPV6Addresses: []*apieni.ENIIPV6Address{
+					{
+						Address: eniIPv6Address,
+					},
+				},
 				SubnetGatewayIPV4Address: subnetGatewayIPV4Address,
 			},
 		},
@@ -130,7 +138,9 @@ func TestNewTaskContainerResponses(t *testing.T) {
 	_, err = json.Marshal(taskResponse)
 	require.NoError(t, err)
 	assert.Equal(t, created.UTC().String(), taskResponse.Containers[0].CreatedAt.String())
-	assert.Equal(t, "192.168.0.0/24", taskResponse.Containers[0].Networks[0].IPV4SubnetCIDRBlock)
+	assert.Equal(t, ipv4SubnetCIDRBlock, taskResponse.Containers[0].Networks[0].IPV4SubnetCIDRBlock)
+	assert.Equal(t, eniIPv6Address, taskResponse.Containers[0].Networks[0].IPv6Addresses[0])
+	assert.Equal(t, ipv6SubnetCIDRBlock, taskResponse.Containers[0].Networks[0].IPv6SubnetCIDRBlock)
 	assert.Equal(t, subnetGatewayIPV4Address, taskResponse.Containers[0].Networks[0].SubnetGatewayIPV4Address)
 
 	gomock.InOrder(