Get AWS IP ranges for region

aws-get-ip-ranges-for-region.py

import requests

ip_ranges = requests.get('https://ip-ranges.amazonaws.com/ip-ranges.json').json()['prefixes']

amazon_ips = set()
ec2_ips = set()


for item in ip_ranges:
    if item['region'] != 'eu-west-1':
        continue

    if item['service'] == 'AMAZON':
        amazon_ips.add(item['ip_prefix'])
    if item['service'] == 'EC2':
        ec2_ips.add(item['ip_prefix'])

amazon_ips_less_ec2 = set()

for ip in amazon_ips:
    if ip not in ec2_ips:
        amazon_ips_less_ec2.add(ip)

ips = list(amazon_ips_less_ec2)
ips.sort()
print('\n'.join(ips))