city.chikusei.ibaraki.jp	IN	NS	ns013-o58cov5anvk7i9cl.o.d-53.info
city.chikusei.ibaraki.jp	IN	NS	ns013-o58cov5anvk7i9cl.o.d-53.jp
city.chikusei.ibaraki.jp	IN	NS	ns013-o58cov5anvk7i9cl.o.d-53.net