This tiny package allows you to obtain ASN meta information for any IP address. Some IP addresses are of course not assigned to an ASN.
npm install asn-from-ipIf you want to clone the repository directly from GitHub instead:
git clone git@github.com:ipapi-is/ip_to_asn.gitLookup the IP address 95.91.211.148:
const { ipToASN } = require('asn-from-ip');
(async () => {
console.log(await ipToASN('95.91.211.148'));
})();which outputs (at the time of writing):
{
asn: 3209,
route: '95.88.0.0/14',
descr: 'VODANET International IP-Backbone of Vodafone, DE',
country: 'de',
active: true,
org: 'Vodafone GmbH',
domain: 'vodafone.com',
abuse: 'abuse.de@vodafone.com',
type: 'isp',
created: '2002-09-11',
updated: '2023-10-12',
rir: 'ripe',
whois: 'https://api.ipapi.is/?whois=AS3209'
}Most IP addresses can be associated with an Autonomeous System (AS). The return value of ipToASN() is an object with the following attributes:
asn-int- The AS numberroute-string- The IP route as CIDR in this ASdescr-string- An informational description of the AScountry-string- The country where the AS is situated in (administratively)active-string- Whether the AS is active (active = at least one route administred by the AS)domain-string- The domain of the organization to which this AS belongsorg-string- The organization responisible for this AStype-string- The type for this ASN, this is eitherhosting,education,goverment,banking,businessorispcreated-string- When the ASN was establishedupdated-string- The last time the ASN was updatedrir-string- To which Regional Internet Registry the ASN belongswhois-string- An url to the whois information for this ASN
For inactive autonomeous systems, most of the above information is not available.
Copy the browser JavaScript bundle to your preferred location. After installing the module with
npm install asn-from-ipyou can find the minified JavaScript here: node_modules/asn-from-ip/dist/ipToASN.min.js
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>IP to ASN Example Browser</title>
<meta name="description" content="IP to ASN Example">
<meta name="author" content="ipapi.is">
</head>
<body>
<pre id="asn"></pre>
<script type="text/javascript" src="dist/ipToASN.min.js"></script>
<script type="text/javascript">
ipToASN('95.91.211.148').then((res) => {
document.getElementById('asn').innerText = JSON.stringify(res, null, 2);
});
</script>
</body>
</html>This package uses the ipapi.is API in order to avoid shipping a huge database in the npm module. If you have a large volume of IP addresses to lookup, you can download the full & free ASN Database.
GitHub mirror of the database: ASN Database Mirror