city.kasumigaura.ibaraki.jp	IN	NS	ns016-k16buagf7j5usev7.k.d-53.info
city.kasumigaura.ibaraki.jp	IN	NS	ns016-k16buagf7j5usev7.k.d-53.jp
city.kasumigaura.ibaraki.jp	IN	NS	ns016-k16buagf7j5usev7.k.d-53.net