ASN & DNS Lookups in Node.js

Returns the ASN, owning organization, network range, and country for an IP — and whether it belongs to a datacenter.

import { IpApiClient } from "ip-api-io";

const client = new IpApiClient({ apiKey: process.env.IP_API_IO_KEY });

const asn = await client.asn("8.8.8.8");

console.log(asn.asn);            // 15169
console.log(asn.organization);  // "Google LLC"
console.log(asn.network);       // "8.8.8.0/24"
console.log(asn.is_datacenter); // true
console.log(asn.country_code);  // "US"

WHOIS record for a domain: registrar, registration/expiry/update dates, name servers, status codes, and the raw WHOIS text.

const whois = await client.whois("example.com");

console.log(whois.registrar?.name);
console.log(whois.registered_on);     // "1995-08-14"
console.log(whois.expires_on);
console.log(whois.name_servers);      // ["a.iana-servers.net", ...]
console.log(whois.status[0]?.humanized);

Resolve an IP to its PTR hostname, or a hostname to its addresses.

const rdns = await client.reverseDns("8.8.8.8");
console.log(rdns.hostname);    // "dns.google"
console.log(rdns.ptr_record);
console.log(rdns.ttl);

const fdns = await client.forwardDns("dns.google");
for (const record of fdns.addresses) {
  console.log(record.type, record.address, record.ttl); // "A" "8.8.8.8" 300
}

const mx = await client.mxRecords("example.com");

for (const record of mx.mx_records) {
  console.log(record.priority, record.hostname, record.ttl);
}