Which registries does it cover?

ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC, and the national registries JPNIC, KRNIC and IDNIC. source says which.

How is it different from ASN?

ASN is one compact row per AS with its routing figures. ASN Whois is the registry's record behind it, contacts included.

What does abuse_kind mean?

Whether the abuse contact is a person, a role account or an incident response team (irt).

Why is a contact field empty?

Because the registry doesn't publish it. Bulk registry data leaves out what privacy rules withhold, most often a personal contact's email, and a record carries only what its holder filed.

The registry record behind every AS number.

One row per AS number, from the registry that delegated it, with the holder, status and dates, and its abuse, admin and technical contacts resolved to names, emails and phone numbers.

Request evaluation

In the lookup API: whois, on a paid plan.

Real rows, with what each column means.

See documentation →

The schema and metadata are in the docs. It is published as CSVGZ.

asn	handle	name	country	source	status	abuse_email
2497	IIJ	Internet Initiative Japan Inc.	JP	jpnic
3320	DTAG	Deutsche Telekom AG	DE	ripe	ASSIGNED	abuse@telekom.de
13335	CLOUDFLARENET	Cloudflare, Inc.	US	arin		abuse@cloudflare.com
24940	HETZNER-AS	Hetzner Online GmbH	DE	ripe	ASSIGNED	abuse@hetzner.com
28573		Claro NXT Telecomunicacoes Ltda	BR	lacnic	DIRECT ALLOCATION	virtua@virtua.com.br

asn_whois_v1

Entries

118,557

Refresh

Daily

CSVGZ

12.40 MB

Download it from your code in one call.

Database API reference →

Every official client fetches the current ASN Whois build to disk, as a link for your own runner or into memory, and checks it against its published checksums.

download()

Streams the current build to a file, which lands only once the whole transfer has arrived, so a failed one never leaves a truncated file behind.

downloadUrl()

The time-limited link the API redirects to, for your own downloader, a job runner or a CDN pull.

downloadBytes()

The build in memory, for a small database or a pipeline that never touches a filesystem.

metadata()

Row count, file sizes and when the build last updated. Poll it and fetch only when a new one has landed.

checksums()

The md5, sha1, sha256 and sha512 digests of one file, to verify it once it lands.

import os
from internetdata import InternetData
 
client = InternetData(os.environ["INTERNETDATA_API_KEY"])
 
# what is in today's build, without moving the file
meta = client.database.metadata("asn_whois_v1")
 
client.database.download("asn_whois_v1", "csvgz", "./asn_whois_v1.csv.gz")
sums = client.database.checksums("asn_whois_v1", "csvgz")
print(meta.updated, meta.entries, sums["sha256"])

load.pypip install internetdata

Also available for .NET, Ruby, Rust, Swift, Erlang, Perl and Zig. See all on GitHub →

Put it to work in your own systems.

Teams join ASN Whois against traffic they already log, inside their own infrastructure, and never send an address anywhere to get an answer.

Network contacts

Reach the abuse, admin or technical contact for an AS without querying each registry in turn.

Due diligence

Check who holds an AS number, under which registry, and since when.

License the full database

Sales will quote on volume, term and whether you need redistribution rights.

Checksums published per file: md5, sha1, sha256 and sha512.

The ID fixes the schema, so a new build never changes the columns your parser reads.

Samples are cut from the current build, not a synthetic extract.

Get a quote See documentation

Call the API in your language, with an official client.

All SDKs on GitHub →

Thirteen official clients, one for each language you ship in and one for the browser, plus middleware for fifteen web frameworks. Each answers private addresses without a request, caches what it looks up and splits big batches for you.

Node.js Web Python Go Java .NET PHP Ruby Rust Swift Erlang Perl Zig Express Fastify Next.js Django Flask FastAPI Laravel Symfony Rails Spring Boot ASP.NET Core net/http Gin axum Cowboy

Common questions

Read the docs →API reference →Email support →

On this page

What does a row tell us?

One AS number's registry record: the AS name, holder, status and dates, and its abuse, admin and technical contacts with names, emails and phone numbers.

00 · Unlimited

Unlimited lookups, no sign-up.

Paste it into a terminal. Any address answers with its country, network, company and hostname, with no key and no daily or monthly cap. ASes and domains answer too.

curl https://api.internetdata.io/8.8.8.8

{
  "ip": "8.8.8.8",
  "is_tor": false,
  "is_anycast": true,
  "is_dns_resolver": true,
  "location": {
    "country": "US", ...
  },
  "asn": { "asn": 15169, ... },
  "hostname": "dns.google"
}

01 · Every field

All of the data on a paid plan.

VPN, proxy, hosting and CDN flags, each naming the operator.

Location to the city, with coordinates and an accuracy radius.

WHOIS records, the whole abuse contact and the services an address runs.

Up to 1,000 addresses, ASes and domains in one request.

A free API key answers every field for its first 100 lookups each day, with no card.

See pricing Get a free API key