This script uses native whois command to return the WHOIS information of the IP Addresses provided.

downloadWHOIS.sh

#!/usr/bin/sh
#
# downloadWHOIS.sh
#
# This script uses native whois command to return the WHOIS information
# of the IP Addresses provided.
#
# USAGE:
# $ ./downloadWHOIS.sh 1.2.3.4
# $ ./downloadWHOIS.sh 1.2.3.4 1.2.3.5 1.2.3.6 etc.
#

# Set path to save files:
path=/Downloads/

# Set filename prefix and/or suffix:
prefix=
suffix=\_whois.txt

for args in "$@"
do
    whois $args > $path$prefix$args$suffix
done