diff --git a/ipwhois/net.py b/ipwhois/net.py
index 091f802..a904654 100644
--- a/ipwhois/net.py
+++ b/ipwhois/net.py
@@ -611,12 +611,17 @@ def get_whois(self, asn_registry='arin', retry_count=3, server=None,
                         'exceeded, wait and try again (possibly a '
                         'temporary block).'.format(self.address_str))
 
-            elif ('error 501' in response or 'error 230' in response
-                  ):  # pragma: no cover
+            elif 'error 501' in response:  # pragma: no cover
 
                 log.debug('WHOIS query error: {0}'.format(response))
                 raise ValueError
 
+            elif 'error 230' in response:  # pragma: no cover
+
+                # No results found
+                log.debug('WHOIS query error: {0}'.format(response))
+                pass
+
             return str(response)
 
         except (socket.timeout, socket.error) as e: