diff --git a/infection_monkey/network/range.py b/infection_monkey/network/range.py
index 4e100378e..4eb4e122c 100644
--- a/infection_monkey/network/range.py
+++ b/infection_monkey/network/range.py
@@ -29,6 +29,10 @@ class NetworkRange(object):
         for x in base_range:
             yield VictimHost(self._number_to_ip(self._base_address + x))
 
+    @abstractmethod
+    def is_in_range(self, ip_address):
+        raise NotImplementedError()
+
     @abstractmethod
     def _get_range(self):
         raise NotImplementedError()