AS番号から紐づくIP帯域を全取得する

環境

• Python 3

やりたいこと

AS番号を渡したらIP帯域をCIDR形式で全部取得したい。

コード

import requests
import json


def get_ipv4_ranges(as_number):
    url = f"https://ipinfo.io/widget/demo/{as_number}?dataset=asn"
    response = requests.get(url)
    data = json.loads(response.text)

    ipv4_ranges = []
    for prefix in data["prefixes"]:
        if "/" in prefix["netblock"]:
            ipv4_ranges.append(prefix["netblock"])

    return ipv4_ranges


def save_to_file(as_number, ipv4_ranges):
    with open(f"{as_number}.txt", "w") as file:
        for range in ipv4_ranges:
            file.write(f"{range}\n")


as_number = "AS7684"
ipv4_ranges = get_ipv4_ranges(as_number)
save_to_file(as_number, ipv4_ranges)