diff --git a/Apps/SplitHorizonApp/dnsApp.config b/Apps/SplitHorizonApp/dnsApp.config
index 0c9c1889..575b4200 100644
--- a/Apps/SplitHorizonApp/dnsApp.config
+++ b/Apps/SplitHorizonApp/dnsApp.config
@@ -18,7 +18,7 @@
             "enabled": true,
             "translateReverseLookups": true,
             "externalToInternalTranslation": {
-               "1.2.3.4": "10.0.0.4",
+               "1.2.3.0/24": "10.0.0.0/24",
                "5.6.7.8": "10.0.0.5"
             }
         },