curl ftp://ftp.afrinic.net/pub/stats/afrinic/delegated-afrinic-latest ftp://ftp.apnic.net/pub/stats/apnic/delegated-apnic-latest ftp://ftp.arin.net/pub/stats/arin/delegated-arin-extended-latest ftp://ftp.lacnic.net/pub/stats/lacnic/delegated-lacnic-latest ftp://ftp.ripe.net/ripe/stats/delegated-ripencc-latest | grep ISO 3166-1 alpha-2 | grep ipv4 | awk -F\| '{ printf("%s/%d\n", $4, 32-log($5)/log(2)) }' > CIDR.txt