tests to make sure that the entered string is in fact an IP address.
*ipaddr*, a ``str``, the IP address you want to get the PTR record for.
+
+ *tcp*, a ``bool``. If ``True``, use TCP to make the query.
+
+ *source*, a ``text`` or ``None``. If not ``None``, bind to this IP
+ address when making queries.
+
+ *raise_on_no_answer*, a ``bool``. If ``True``, raise
+ ``dns.resolver.NoAnswer`` if there's no answer to the question.
+
+ *source_port*, an ``int``, the port from which to send the message.
+
+ *lifetime*, a ``float``, how many seconds a query should run before timing out.
"""
return self.query(dns.reversename.from_address(address),