is_aws_ip.py

import ipaddress
import requests
from argparse import ArgumentParser

def load_iprange() -> list[str]:
    data = requests.get('https://ip-ranges.amazonaws.com/ip-ranges.json').json()
    return [data['ip_prefix'] for data in data['prefixes']]
    
def check_ip(ip: str) -> bool:
    target = ipaddress.ip_address(ip)
    ranges = load_iprange()
    for r in ranges:
        if target in ipaddress.ip_network(r):
            return True

def main():
    parser = ArgumentParser()
    parser.add_argument('ip', help='IP Address to check')
    args = parser.parse_args()
    if check_ip(args.ip):
        print(f'{args.ip} is in AWS IP range')
    else:
        print(f'{args.ip} is not in AWS IP range')

main()