Small, fast, simple tool for performing reverse DNS lookups en masse. You feed it IP addresses, it returns hostnames.
This can be a useful way of finding domains and subdomains belonging to a company from their IP addresses.
go install github.com/hakluke/hakrevdns@latest
hakrevdns [OPTIONS]
-t, --threads= How many threads should be used (default: 8)
-r, --resolver= IP of the DNS resolver to use for lookups
-P, --protocol=[tcp|udp] Protocol to use for lookups (default: udp)
-p, --port= Port to bother the specified DNS resolver on (default: 53)
-d, --domain Output only domains
Help Options:
-h, --help Show this help message
Used in combination with prips.
$ prips 173.0.84.0/24 | hakrevdns
173.0.84.110 he.paypal.com.
173.0.84.109 twofasapi.paypal.com.
173.0.84.114 www-carrier.paypal.com.
173.0.84.77 twofasapi.paypal.com.
173.0.84.102 pointofsale.paypal.com.
173.0.84.104 slc-a-origin-pointofsale.paypal.com.
173.0.84.111 smsapi.paypal.com.
173.0.84.203 m.paypal.com.
173.0.84.105 prm.paypal.com.
173.0.84.113 mpltapi.paypal.com.
173.0.84.8 ipnpb.paypal.com.
173.0.84.2 active-www.paypal.com.
173.0.84.4 securepayments.paypal.com.
$ echo "173.0.84.110" | hakrevdns -r 1.1.1.1
173.0.84.110 he.paypal.com.
$ echo "173.0.84.110" | hakrevdns -d
he.paypal.com