diff --git a/pythonwhois/__init__.py b/pythonwhois/__init__.py
index 838dddd..40ac193 100644
--- a/pythonwhois/__init__.py
+++ b/pythonwhois/__init__.py
@@ -58,6 +58,7 @@ grammar = {
 					 '(?P<val>[a-z0-9-]+\.d?ns[0-9]*\.([a-z0-9-]+\.)+[a-z0-9]+)',
 					 '(?P<val>([a-z0-9-]+\.)+[a-z0-9]+)(\s+([0-9]{1,3}\.){3}[0-9]{1,3})',
 					 'DNS[0-9]+:\s*(?P<val>.+)',
+					 'ns[0-9]+:\s*(?P<val>.+)',
 					 '[^a-z0-9-](?P<val>dns\.([a-z0-9-]+\.)+[a-z0-9]+)'],
 		'emails':		['(?P<val>[\w.-]+@[\w.-]+\.[\w]{2,4})']
 	},