code: def zone_transfer(address, dns_name):
      
      ips = []
      try:
          print_notification("Attempting dns zone transfer for {} on {}".format(dns_name, address))
          z = dns.zone.from_xfr(dns.query.xfr(address, dns_name))
      except dns.exception.FormError:
          print_notification("Zone transfer not allowed")
          return ips
      names = z.nodes.keys()
      print_success("Zone transfer successfull for {}, found {} entries".format(address, len(names)))
      for n in names:
          node = z[n]
          data = node.get_rdataset(dns.rdataclass.IN, dns.rdatatype.A)
          if data:
              # TODO add hostnames to entries.
              # hostname = n.to_text()
              for item in data.items:
                  address = item.address
                  ips.append(address)
      return ips
docs: Tries to perform a zone transfer.