diff --git a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/SubnetCodec.java b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/SubnetCodec.java
new file mode 100644
index 0000000..8f0fd2e
--- /dev/null
+++ b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/SubnetCodec.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.vtnrsc.web;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.vtnrsc.Subnet;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * Subnet JSON codec.
+ */
+public final class SubnetCodec extends JsonCodec<Subnet> {
+    @Override
+    public ObjectNode encode(Subnet subnet, CodecContext context) {
+        checkNotNull(subnet, "Subnet cannot be null");
+        ObjectNode result = context.mapper().createObjectNode()
+                .put("id", subnet.id().toString())
+                .put("gate_ip", subnet.gatewayIp().toString())
+                .put("network_id", subnet.networkId().toString())
+                .put("name", subnet.subnetName().toString())
+                .put("ip_version", subnet.ipVersion().toString())
+                .put("cidr", subnet.cidr().toString())
+                .put("shared", subnet.shared())
+                .put("enabled_dchp", subnet.dhcpEnabled())
+                .put("tenant_id", subnet.tenantId().toString());
+        result.set("alloction_pools", new AllocationPoolsCodec().encode(subnet
+                .allocationPools(), context));
+        result.set("host_routes",
+                   new HostRoutesCodec().encode(subnet.hostRoutes(), context));
+        return result;
+    }
+}