@ SOA ns1 hostmaster.isc.org. 1 600 600 1200 600 @ NS ns1 ns1 A 10.53.0.1 large TXT ( large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large large )