Batch WHOIS lookup

whois

#!/bin/bash

if [ "$#" == "0" ]; then
  echo "You need to supply at least one argument!"
  exit 1
fi

DOMAINS=('.com' '.net' '.org')
ELEMENTS=${#DOMAINS[@]}

while (( "$#" )); do
  for (( i=0; i<$ELEMENTS; i++ )); do
    whois $1${DOMAINS[${i}]} | egrep -q \
      '^No match|^NOT FOUND|^Not fo|AVAILABLE|^No Data For|has not been regi|No entri'
    if [ $? -eq 0 ]; then
      echo "$1${DOMAINS[${i}]} : available"
    fi
  done
  shift
done