diff --git a/Lib/ipaddress.py b/Lib/ipaddress.py
--- a/Lib/ipaddress.py
+++ b/Lib/ipaddress.py
@@ -1307,16 +1307,21 @@ class IPv4Address(_BaseV4, _BaseAddress)
         Returns:
             A boolean, True if the address is reserved per
             iana-ipv4-special-registry.
 
         """
         return any(self in net for net in self._constants._private_networks)
 
     @property
+    @functools.lru_cache()
+    def is_global(self):
+        return self not in self._constants._public_network and not self.is_private
+
+    @property
     def is_multicast(self):
         """Test if the address is reserved for multicast use.
 
         Returns:
             A boolean, True if the address is multicast.
             See RFC 3171 for details.
 
         """
@@ -1552,16 +1557,18 @@ class IPv4Network(_BaseV4, _BaseNetwork)
 
 class _IPv4Constants:
     _linklocal_network = IPv4Network('169.254.0.0/16')
 
     _loopback_network = IPv4Network('127.0.0.0/8')
 
     _multicast_network = IPv4Network('224.0.0.0/4')
 
+    _public_network = IPv4Network('100.64.0.0/10')
+
     _private_networks = [
         IPv4Network('0.0.0.0/8'),
         IPv4Network('10.0.0.0/8'),
         IPv4Network('127.0.0.0/8'),
         IPv4Network('169.254.0.0/16'),
         IPv4Network('172.16.0.0/12'),
         IPv4Network('192.0.0.0/29'),
         IPv4Network('192.0.0.170/31'),
diff --git a/Lib/test/test_ipaddress.py b/Lib/test/test_ipaddress.py
--- a/Lib/test/test_ipaddress.py
+++ b/Lib/test/test_ipaddress.py
@@ -1621,16 +1621,19 @@ class IpaddrUnitTest(unittest.TestCase):
                 '172.31.255.255').is_private)
         self.assertEqual(False, ipaddress.ip_address('172.32.0.0').is_private)
 
         self.assertEqual(True,
                          ipaddress.ip_address('169.254.100.200').is_link_local)
         self.assertEqual(False,
                          ipaddress.ip_address('169.255.100.200').is_link_local)
 
+        self.assertTrue(ipaddress.ip_address('192.0.7.1').is_global)
+        self.assertFalse(ipaddress.ip_address('203.0.113.1').is_global)
+
         self.assertEqual(True,
                           ipaddress.ip_address('127.100.200.254').is_loopback)
         self.assertEqual(True, ipaddress.ip_address('127.42.0.0').is_loopback)
         self.assertEqual(False, ipaddress.ip_address('128.0.0.0').is_loopback)
         self.assertEqual(True, ipaddress.ip_network('0.0.0.0').is_unspecified)
 
     def testReservedIpv6(self):