A simple bash tool to lookup the own of an IP address. TL;DR a straight to the point whois

whoOwnsThisIP.sh

#!/bin/bash
#
# A simple bash script to look up
# who owns an IP Address based on
# the IP address's whois data
#
# Author: Liam Haworth <liam@haworth.id.au>
#

IPADDR=$1
WHOIS_DATA=$(whois $IPADDR)
FIELDS=("org-name" "OrgName" "descr" "owner")

for field in ${FIELDS[@]}; do
	OWNER=$(echo "$WHOIS_DATA" | awk -v whoisField="$field:" '$0 ~ whoisField {$1 = ""; sub(/^[ \t\r\n]+/, "", $0); print $0}')

	if [ ! -z "${OWNER}" ]; then
		break
	fi
done

if [ -z "${OWNER}" ]; then
	OWNER="UNKOWN (Not in database)"
fi

echo -e "\033[32mIP Address [\033[31m$IPADDR\033[32m] belongs to [\033[33m$OWNER\033[32m]\033[0m"