PaReD is a simple Python script that tries to determine one or more FQDNs of a given IP address using passive reverse DNS lookups.
Usage:
usage: pared.py [-h] (-i IP | -s SUBNET | -f FILE) [-o OUTPUT] [-r] [--source {hackertarget,mnemonic}]
optional arguments:
-h, --help show this help message and exit
-i IP, --ip IP single IP address
-s SUBNET, --subnet SUBNET
subnet in CIDR notation
-f FILE, --file FILE file containing a list of IP addresses
-o OUTPUT, --output OUTPUT
save output to file
-r, --rua random user agent
--source {hackertarget,mnemonic}
source of passive dns data ("hackertarget" is the default)