изменил условие результирующео списа

+ добавил домена более 2-го уровня

components/Collection.php

@@ -26,8 +26,17 @@ class Collection extends Component
             '',
             utf8_encode($domain)
         );
-        if (count( explode('.', $host) ) === 2)
-            $out = $host;
+        if (filter_var($host, FILTER_VALIDATE_IP)===false)
+            {
+                $host_parts = explode('.', $host);
+                $host_parts = array_reverse($host_parts);
+                $host_parts = array_slice($host_parts, 0, 2);
+                $host_parts = array_reverse($host_parts);
+                if (count($host_parts) === 2)
+                    $out = $host;
+                unset($host_parts);
+            }
+
         unset($host);
         return $out;
     }

controllers/HostFreeController.php

@@ -46,7 +46,7 @@ class HostFreeController extends Controller
      */
     public function actionIndex()
     {
-        $searchModel = new HostSearch(['wis_status' => Host::STATUS_WIS_FREE, 'status' => Filter::STATUS_ON, 'f1_status' => Filter::STATUS_ON, 'f2_status' => Filter::STATUS_ON, 'f3_status' => Filter::STATUS_ON]);
+        $searchModel = new HostSearch(['wis_status' => Host::STATUS_WIS_FREE, 'status' => Filter::STATUS_ON, 'f1_status' => Filter::STATUS_ON]);
         $dataProvider = $searchModel->search(Yii::$app->request->queryParams);
 
         return $this->render('index', [