@ IN SOA ns.xn--foo.com. admin.xn--foo.com. ( 2018081601 1d 2h 4w 1h )
@ IN NS ns

@ IN MX 10 mx.xn--foo.com.
@ IN A    192.0.2.1
@ IN AAAA 2001:db8:10::1

ns  IN A    192.0.2.2
ns  IN AAAA 2001:db8:10::2
WWW IN CNAME xn--foo.com.
mx  IN A 192.0.2.3