diff --git a/rpyc/core/netref.py b/rpyc/core/netref.py
index a5e13c38..39fb905d 100644
--- a/rpyc/core/netref.py
+++ b/rpyc/core/netref.py
@@ -231,7 +231,7 @@ def __instancecheck__(self, other):
             else:
                 return syncreq(self, consts.HANDLE_INSTANCECHECK, other.____id_pack__)
         else:
-            return isinstance(other, self)
+            return isinstance(other, self.__class__)
 
 
 def _make_method(name, doc):
@@ -295,7 +295,7 @@ def class_factory(id_pack, methods):
             else:
                 _module = sys.modules.get(name_pack)
             if _module:
-                if id_pack[0] != 0:
+                if id_pack[2] == 0:
                     ns["__class__"] = _module
                 else:
                     ns["__class__"] = getattr(_module, "__class__", None)
diff --git a/tests/test_custom_service.py b/tests/test_custom_service.py
index 847a026d..a2277a48 100644
--- a/tests/test_custom_service.py
+++ b/tests/test_custom_service.py
@@ -43,6 +43,9 @@ def foobar(self):
     def exposed_getmeta(self):
         return MyClass()
 
+    def exposed_instance(self, inst, cls):
+        return isinstance(inst, cls)
+
 
 class TestCustomService(unittest.TestCase):
     config = {}
@@ -84,6 +87,10 @@ def test_metaclasses(self):
         x = self.conn.root.getmeta()
         print(x)
 
+    def test_instancecheck_list(self):
+        remote_list = self.conn.root.getlist()
+        self.assertTrue(self.conn.root.instance(remote_list, list))
+
 
 if __name__ == "__main__":
     unittest.main()