diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/intf/InterfaceService.java b/incubator/api/src/main/java/org/onosproject/incubator/net/intf/InterfaceService.java
index f959a5c..4de235f 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/intf/InterfaceService.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/intf/InterfaceService.java
@@ -79,4 +79,13 @@
      * @return interface
      */
     Interface getMatchingInterface(IpAddress ip);
+
+    /**
+     * Returns all interfaces that have an address that is in the same
+     * subnet as the given IP address.
+     *
+     * @param ip IP address to find matching subnet interface for
+     * @return a set of interfaces
+     */
+    Set<Interface> getMatchingInterfaces(IpAddress ip);
 }
diff --git a/incubator/api/src/test/java/org/onosproject/incubator/net/intf/InterfaceServiceAdapter.java b/incubator/api/src/test/java/org/onosproject/incubator/net/intf/InterfaceServiceAdapter.java
index bc91019..8768b1f 100644
--- a/incubator/api/src/test/java/org/onosproject/incubator/net/intf/InterfaceServiceAdapter.java
+++ b/incubator/api/src/test/java/org/onosproject/incubator/net/intf/InterfaceServiceAdapter.java
@@ -57,6 +57,11 @@
     }
 
     @Override
+    public Set<Interface> getMatchingInterfaces(IpAddress ip) {
+        return null;
+    }
+
+    @Override
     public void addListener(InterfaceListener listener) {
 
     }