Extract ip information from apnic to share script

#!/bin/bash

# download from apnic
rm -f delegated-apnic-latest
wget /apnic/stats/apnic/delegated-apnic-latest

# IPs allocated to china.
grep 'apnic|CN|ipv4|' delegated-apnic-latest | cut -f 4 -d'|' > delegated-apnic-CN

# get detail of echo IP from apnic database.
rm -f apnic_CN.txt
while read ip
do
    # query apnic database
    echo "query who is $ip"
    whois -h $ip >
    grep inetnum  >> apnic_CN.txt          # IP range
    grep netname  >> apnic_CN.txt          # netname which include sp information 
    grep descr    >> apnic_CN.txt          # description which include province information
    echo ""  >> apnic_CN.txt          
done < delegated-apnic-CN

# clean up
rm -f
rm -f delegated-apnic-latest
rm -f delegated-apnic-CN