home.arpa	IN	NS	blackhole-1.iana.org
home.arpa	IN	NS	blackhole-2.iana.org
ipv4only.arpa	IN	A	192.0.0.170
ipv4only.arpa	IN	A	192.0.0.171
ipv4only.arpa	IN	NS	a.iana-servers.net
ipv4only.arpa	IN	NS	b.iana-servers.net
ipv4only.arpa	IN	NS	c.iana-servers.net
ipv4only.arpa	IN	NS	ns.icann.org