dnsname - recursive reverse lookup for IP address
dnsname prints the first domain name for that address. If no domain
names are listed in DNS, dnsname prints a blank line. You can list
several IP addresses;
dnsname prints each result on a separate line.
There is also a dnsfilter(1) program that reads IP addresses from its
input and performs many reverse lookups in parallel.
dnsip(1), dnsipq(1), dnsmx(1), dnstxt(1), dnsqr(1), dnsq(1),
Man(1) output converted with