city.date.hokkaido.jp	IN	MX	mail.city.date.hokkaido.jp.
city.date.hokkaido.jp	IN	NS	ns014-f50h5fjv12n7hr8f.f.d-53.info.
city.date.hokkaido.jp	IN	NS	ns014-f50h5fjv12n7hr8f.f.d-53.jp.
city.date.hokkaido.jp	IN	NS	ns014-f50h5fjv12n7hr8f.f.d-53.net.