npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

asnlookup

v1.0.1

Published

IP to ASN lookup using BGP table listings from http://thyme.apnic.net/current/

Downloads

23

Readme

asnlookup

Node.JS module for getting ASN for a given IP address. It uses data from http://thyme.apnic.net/current/ .

Mostly inspired by https://www.npmjs.com/package/iptoasn but without native code and using async/await instead of callback style.

Installation

npm install --save asnlookup

Description

This module downloads raw BGP table (~13MB) and ASN to name mapping (~2MB) files from http://thyme.apnic.net/current/ and converts them into a more useful format that allows for a quick search.

WARNING: To improve the lookup speed by a lot only /16 at most is currently supported as the first 2 bytes of the address is used for quick lookup! On the upside this makes it more specific for ranges covered by various ASNs

Usage

'use strict';

// you must pass a filepath for the local cache, otherwise .asnlookup.cache will be used
const asnlookup = require('./index.js')('.asnlookup.cache');

(async function() {
    const testArray = [
        '8.8.8.8',
        '50.22.180.100',
        '1.2.3.4',
        '104.16.181.15',
        '127.0.0.1',
        'asd'
    ];

    // call .load() for an attempt to load the local cache, this will require 10s of MB of memory!
    await asnlookup.load();

    // check when the cache was updated
    // lastUpdated are days
    // lastUpdated is Infinity if there's no cache at all
    const lastUpdated = asnlookup.lastUpdated();

    console.log(`Last updated ${lastUpdated} days ago.`);

    // update the cache if it's older than 31 days
    if (lastUpdated > 31) {
        console.log('Cache too old or never created. Updating...');
        await asnlookup.update();
    }

    testArray.forEach(function(ip) {
        console.log(ip, '-', asnlookup.lookup(ip));
    });
})();

Result of this sample script:

Last updated 0 days ago.
8.8.8.8 - LEVEL3
50.22.180.100 - SOFTLAYER
1.2.3.4 - null
104.16.181.15 - CLOUDFLARENET
127.0.0.1 - null
asd - null