DNS Zone

#!/bin/bash
#Usage : bash file.sh domain.tld
#Cari subdomain+ip aktiv (sub.domain.tld 12.345.678.9)

if [ -z "$1" ]; then
    echo ""
    echo "[*] Please enter a valid URL"
    echo ""
    exit 0
fi

echo ""
echo "[*] The following addresses were found"
echo ""

for server in $(host -t ns $1|cut -d" " -f4);do
    host -l $1  $server |grep "has address" | cut -d " " -f1,4;

done