diff --git a/src/netbase.cpp b/src/netbase.cpp
index dec00e1eeb..7a87d125c2 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -983,7 +983,7 @@ std::vector<unsigned char> CNetAddr::GetGroup() const
         nBits -= 8;
     }
     if (nBits > 0)
-        vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
+        vchRet.push_back(GetByte(15 - nStartByte) | ((1 << (8 - nBits)) - 1));
 
     return vchRet;
 }
diff --git a/src/test/netbase_tests.cpp b/src/test/netbase_tests.cpp
index 7154476c7c..3f99dc98d9 100644
--- a/src/test/netbase_tests.cpp
+++ b/src/test/netbase_tests.cpp
@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include <boost/assign/list_of.hpp>
 #include <boost/test/unit_test.hpp>
 
 using namespace std;
@@ -156,4 +157,20 @@ BOOST_AUTO_TEST_CASE(subnet_test)
     BOOST_CHECK(CSubNet(CNetAddr("1:2:3:4:5:6:7:8")).ToString() == "1:2:3:4:5:6:7:8/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff");
 }
 
+BOOST_AUTO_TEST_CASE(netbase_getgroup)
+{
+    BOOST_CHECK(CNetAddr("127.0.0.1").GetGroup() == boost::assign::list_of(0)); // Local -> !Routable()
+    BOOST_CHECK(CNetAddr("257.0.0.1").GetGroup() == boost::assign::list_of(0)); // !Valid -> !Routable()
+    BOOST_CHECK(CNetAddr("10.0.0.1").GetGroup() == boost::assign::list_of(0)); // RFC1918 -> !Routable()
+    BOOST_CHECK(CNetAddr("169.254.1.1").GetGroup() == boost::assign::list_of(0)); // RFC3927 -> !Routable()
+    BOOST_CHECK(CNetAddr("1.2.3.4").GetGroup() == boost::assign::list_of((unsigned char)NET_IPV4)(1)(2)); // IPv4
+    BOOST_CHECK(CNetAddr("::FFFF:0:102:304").GetGroup() == boost::assign::list_of((unsigned char)NET_IPV4)(1)(2)); // RFC6145
+    BOOST_CHECK(CNetAddr("64:FF9B::102:304").GetGroup() == boost::assign::list_of((unsigned char)NET_IPV4)(1)(2)); // RFC6052
+    BOOST_CHECK(CNetAddr("2002:102:304:9999:9999:9999:9999:9999").GetGroup() == boost::assign::list_of((unsigned char)NET_IPV4)(1)(2)); // RFC3964
+    BOOST_CHECK(CNetAddr("2001:0:9999:9999:9999:9999:FEFD:FCFB").GetGroup() == boost::assign::list_of((unsigned char)NET_IPV4)(1)(2)); // RFC4380
+    BOOST_CHECK(CNetAddr("FD87:D87E:EB43:edb1:8e4:3588:e546:35ca").GetGroup() == boost::assign::list_of((unsigned char)NET_TOR)(239)); // Tor
+    BOOST_CHECK(CNetAddr("2001:470:abcd:9999:9999:9999:9999:9999").GetGroup() == boost::assign::list_of((unsigned char)NET_IPV6)(32)(1)(4)(112)(175)); //he.net
+    BOOST_CHECK(CNetAddr("2001:2001:9999:9999:9999:9999:9999:9999").GetGroup() == boost::assign::list_of((unsigned char)NET_IPV6)(32)(1)(32)(1)); //IPv6
+}
+
 BOOST_AUTO_TEST_SUITE_END()