#!/usr/bin/python

# Name: aws_ip_cidr
# Created: 2017-02-21
# Last updated: 2017-02-21
# Version: 0.1
#
# Purpose: Parse a JSON file downloaded from 
# https://ip-ranges.amazonaws.com/ip-ranges.json that contains a list of the
# IP address ranges used by Amazon Web Services (AWS). Display just the
# Classless Inter-Domain Routing (CIDR) address blocks

import json

data = json.load(open('ip-ranges.json'))
for d in data["prefixes"]:
    print d["ip_prefix"]