How can I retrieve the CIDR for the Autonomous System (AS) that an IP address belongs to using Python?

To determine the Autonomous System (AS) CIDR for an IP address using IP2Location.io in Python, you can use the IP2Location.io API to retrieve geolocation and related data.

  1. We'll assume that you have already installed Python and we won't cover that here. You will also need a paid subscription to the Security plan. Subscribe now!
  2. In the command line, run the command below to install the Requests package using pip if you don't have it installed.
    Bash 
    
python -m pip install requests
  3. Save the below code into a file called test.py on your computer.
    Python 
    
import requests
from requests.exceptions import HTTPError
import json

key = 'YOUR_API_KEY'
ip = '8.8.8.8'
payload = {'key': key, 'ip': ip, 'format': 'json'}

try:
    response = requests.get('https://api.ip2location.io/', params=payload)
    response.raise_for_status()
except HTTPError as http_err:
    if 'error_message' in response.text:
        myobj = json.loads(response.text)
        print(f"ERROR: {myobj['error']['error_message']}")
    else:
        print(f"ERROR: {http_err}")
except Exception as err:
        print(f"ERROR: {err}")
else:
    try:
        myobj = json.loads(response.text)
        if 'as_info' in myobj:
            print(f"The AS CIDR for IP {ip} is {myobj['as_info']['as_cidr']}.")
        else:
            print("ERROR: The as_cidr field requires a paid subscription to the Security plan.")
    except json.JSONDecodeError as e:
        print("ERROR: Invalid JSON in response.")
  4. In the command line, run the below command.
    Bash 
    
python test.py

This script will output the AS CIDR of specified IP address. Make sure to replace 8.8.8.8 with the IP address you want and replace YOUR_API_KEY to your own API key.

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