.ARPA domain list & statistics

11 domains in the latest list — Snapshot:

Download .ARPA domain names, review available statistics, and build repeatable research with dated snapshots and API access.

All datasets are updated daily by 9 AM UTC. Check the snapshot date and coverage notes before using a file.

.ARPA domain list file

Gzip-compressed plain text with one .ARPA domain per line. Download the names in our current dataset.

  • Daily updated data - snapshot date: 13 Sep 2026
  • Total domains in the list: 11
  • File size: 92 B
  • Download from website (with one mouse click!)
  • Download via simple HTTP REST API (automate!)
Preview .ARPA domain names

An excerpt from the available sample file, not a ranking or a list of domains available to register.

as112.arpa
e164.arpa
home.arpa
in-addr-servers.arpa
in-addr.arpa
ip6-servers.arpa
ip6.arpa
ipv4only.arpa
iris.arpa
uri.arpa
urn.arpa

Downloads require an account and appropriate access. See plans and limits and dataset licensing terms.

1. .ARPA domain counts at a glance

Counts describe our observed dataset. Additions and removals are not independently verified registration or expiration events. Net observed change for 13 Sep 2026: 0 domains.

Domains in the dataset
11
Latest available snapshot
Observed additions
0
Observation: 13 Sep 2026
Observed removals
0
Observation: 13 Sep 2026

2. .ARPA domain statistics - recent observations

Available observations from the last 90 days. Gaps may occur; the table provides dates and counts behind the charts.

Date Total domains Observed additions Observed removals
2026-09-13 11 0 0
2026-09-12 11 0 0
2026-09-11 11 0 0
2026-09-10 11 0 0
2026-09-09 11 0 0
2026-09-08 11 0 0
2026-09-07 11 0 0
2026-09-06 11 0 0
2026-09-05 11 0 0
2026-09-04 11 0 0
2026-09-03 11 0 0
2026-09-02 11 0 0
2026-09-01 11 0 0
2026-08-31 11 0 0
2026-08-30 11 0 0
2026-08-29 11 0 0
2026-08-28 11 0 0
2026-08-27 11 0 0
2026-08-26 11 0 0
2026-08-25 11 0 0
2026-08-24 11 0 0
2026-08-23 11 0 0
2026-08-22 11 0 0
2026-08-21 11 0 0
2026-08-20 11 0 0
2026-08-19 11 0 0
2026-08-18 11 0 0
2026-08-17 11 0 0
2026-08-16 11 0 0
2026-08-15 11 0 0
2026-08-14 11 0 0
2026-08-13 11 0 0
2026-08-12 11 0 0
2026-08-11 11 0 0
2026-08-10 11 0 0
2026-08-09 11 0 0
2026-08-08 11 0 0
2026-08-07 11 0 0
2026-08-06 11 0 0
2026-08-05 11 0 0
2026-08-04 11 0 0
2026-08-03 11 0 0
2026-08-02 11 0 0
2026-08-01 11 0 0
2026-07-31 11 0 0
2026-07-30 11 0 0
2026-07-29 11 0 0
2026-07-27 11 0 0
2026-07-26 11 0 0
2026-07-25 11 0 0
2026-07-24 11 0 0
2026-07-23 11 0 0
2026-07-22 11 0 0
2026-07-21 11 0 0
2026-07-20 11 0 0
2026-07-19 11 0 0
2026-07-18 11 0 0
2026-07-17 11 0 0
2026-07-16 11 0 0
2026-07-15 11 0 0
2026-07-14 11 0 0
2026-07-13 11 0 0
2026-07-12 11 0 0
2026-07-11 11 0 0
2026-07-10 11 0 0
2026-07-09 11 0 0
2026-07-08 11 0 0
2026-07-07 11 0 0
2026-07-06 11 0 0
2026-07-05 11 0 0
2026-07-04 11 0 0
2026-07-03 11 0 0
2026-07-02 11 0 0
2026-07-01 11 0 0
2026-06-30 11 0 0
2026-06-29 11 0 0
2026-06-28 11 0 0
2026-06-27 11 0 0
2026-06-26 11 0 0
2026-06-25 11 0 0
2026-06-24 11 0 0
2026-06-23 11 0 0
2026-06-22 11 0 0
2026-06-21 11 0 0
2026-06-20 11 0 0
2026-06-19 11 0 0
2026-06-18 11 0 0
2026-06-17 11 0 0
2026-06-16 11 0 0

3. Zone Details: .arpa

Zone Name arpa
Zone Type infrastructure
Assigned by IANA YES
Public registrations allowed Restricted or not open for general public registration. Check the registry's current eligibility rules.
WHOIS Server whois.iana.org
RDAP Server
Managing Organization Internet Architecture Board (IAB)
Organization Address c/o IETF Administration LLC
1000 N. West St.
Suite 1200
Wilmington DE 19801
United States of America (the)

4. Historical Domain Lists for .arpa zone

Access the archive of historical .ARPA domain lists and analyze how domains in the .ARPA namespace have evolved over time. Historical domain data helps researchers and engineers study domain growth, changes in domain-list membership, and long-term internet trends. Archive dates and coverage vary; see historical dataset access.

Date Domains File Size Download
2026-09-13 11 92 B Download
2026-09-12 11 92 B Download
2026-09-11 11 92 B Download
2026-09-10 11 92 B Download
2026-09-09 11 92 B Download
2026-09-08 11 92 B Download
2026-09-07 11 92 B Download
2026-09-06 11 92 B Download
2026-09-05 11 92 B Download
2026-09-04 11 92 B Download
2026-09-03 11 92 B Download
2026-09-02 11 92 B Download
2026-09-01 11 92 B Download
2026-08-31 11 92 B Download
2026-08-30 11 92 B Download
2026-08-29 11 92 B Download
2026-08-28 11 92 B Download
2026-08-27 11 92 B Download
2026-08-26 11 92 B Download
2026-08-25 11 92 B Download
2026-08-24 11 92 B Download
2026-08-23 11 92 B Download
2026-08-22 11 92 B Download
2026-08-21 11 92 B Download
2026-08-20 11 92 B Download
2026-08-19 11 92 B Download
2026-08-18 11 92 B Download
2026-08-17 11 92 B Download
2026-08-16 11 92 B Download
2026-08-15 11 92 B Download
2026-08-14 11 92 B Download
2026-08-13 11 92 B Download
2026-08-12 11 92 B Download
2026-08-11 11 92 B Download
2026-08-10 11 92 B Download
2026-08-09 11 92 B Download
2026-08-08 11 92 B Download
2026-08-07 11 92 B Download
2026-08-06 11 92 B Download
2026-08-05 11 92 B Download
2026-08-04 11 92 B Download
2026-08-03 11 92 B Download
2026-08-02 11 92 B Download
2026-08-01 11 92 B Download
2026-07-31 11 92 B Download
2026-07-30 11 92 B Download
2026-07-29 11 92 B Download
2026-07-27 11 92 B Download
2026-07-26 11 92 B Download
2026-07-25 11 92 B Download
2026-07-24 11 92 B Download
2026-07-23 11 92 B Download
2026-07-22 11 92 B Download
2026-07-21 11 92 B Download
2026-07-20 11 92 B Download
2026-07-19 11 92 B Download
2026-07-18 11 92 B Download
2026-07-17 11 92 B Download
2026-07-16 11 92 B Download
2026-07-15 11 92 B Download
2026-07-14 11 92 B Download
2026-07-13 11 92 B Download
2026-07-12 11 92 B Download
2026-07-11 11 92 B Download
2026-07-10 11 92 B Download
2026-07-09 11 92 B Download
2026-07-08 11 92 B Download
2026-07-07 11 92 B Download
2026-07-06 11 92 B Download
2026-07-05 11 92 B Download
2026-07-04 11 92 B Download
2026-07-03 11 92 B Download
2026-07-02 11 92 B Download
2026-07-01 11 92 B Download
2026-06-30 11 92 B Download
2026-06-29 11 92 B Download
2026-06-28 11 92 B Download
2026-06-27 11 92 B Download
2026-06-26 11 92 B Download
2026-06-25 11 92 B Download
2026-06-24 11 92 B Download
2026-06-23 11 92 B Download
2026-06-22 11 92 B Download
2026-06-21 11 92 B Download
2026-06-20 11 92 B Download
2026-06-19 11 92 B Download
2026-06-18 11 92 B Download
2026-06-17 11 92 B Download
2026-06-16 11 92 B Download
2026-06-15 11 92 B Download
2026-06-14 11 92 B Download
2026-06-13 11 92 B Download
2026-06-12 11 92 B Download
2026-06-11 11 92 B Download
2026-06-10 11 92 B Download
2026-06-09 11 92 B Download
2026-06-08 11 92 B Download
2026-06-07 11 92 B Download
2026-06-06 11 92 B Download
2026-06-05 11 92 B Download
2026-06-04 11 92 B Download
2026-06-03 11 92 B Download
2026-06-02 11 92 B Download
2026-06-01 11 92 B Download
2026-05-31 11 92 B Download
2026-05-30 11 92 B Download
2026-05-29 11 92 B Download
2026-05-28 11 92 B Download
2026-05-27 11 92 B Download
2026-05-26 11 92 B Download
2026-05-25 11 92 B Download
2026-05-24 11 92 B Download
2026-05-23 11 92 B Download
2026-05-22 11 92 B Download
2026-05-21 11 92 B Download
2026-05-20 11 92 B Download
2026-05-19 11 92 B Download
2026-05-18 11 92 B Download
2026-05-17 11 92 B Download
2026-05-16 11 92 B Download
2026-05-15 11 92 B Download
2026-05-14 11 92 B Download
2026-05-13 11 92 B Download
2026-05-12 11 92 B Download
2026-05-11 11 92 B Download
2026-05-10 11 92 B Download
2026-05-09 11 92 B Download
2026-05-08 11 92 B Download
2026-05-07 11 92 B Download
2026-05-06 11 92 B Download
2026-05-05 11 92 B Download
2026-05-04 11 92 B Download
2026-05-03 11 92 B Download
2026-05-02 11 92 B Download
2026-05-01 11 92 B Download
2026-04-30 11 92 B Download
2026-04-29 11 92 B Download
2026-04-28 11 92 B Download

5. Download latest .arpa domain list via API

import axios from 'axios';
import fs from 'fs';
import { pipeline } from 'stream/promises';

const response = await axios({
  method: 'GET',
  url: 'https://allzonefiles.io/api/v1/zones/arpa/dl',
  responseType: 'stream',
  headers: {
    // Replace with your API key
    'Authorization': 'Bearer allzfio_5c1572d016b846ce99ce7a177922ff21'
  }
});

await pipeline(response.data, fs.createWriteStream('arpa.txt.gz'));

console.log('Download complete!');
package main

import (
    "io"
    "net/http"
    "os"
)

func main() {
    url := "https://allzonefiles.io/api/v1/zones/arpa/dl"
    file, _ := os.Create("arpa.txt.gz")
    defer out.Close()

    req, _ := http.NewRequest("GET", url, nil)
    // Replace with your API key
    req.Header.Set("Authorization", "Bearer allzfio_5c1572d016b846ce99ce7a177922ff21")

    resp, _ := http.DefaultClient.Do(req)
    defer resp.Body.Close()

    io.Copy(out, resp.Body)
}
import requests

url = "https://allzonefiles.io/api/v1/zones/arpa/dl"
# Replace with your API key
headers = {"Authorization": "Bearer allzfio_5c1572d016b846ce99ce7a177922ff21"}

with requests.get(url, headers=headers, stream=True) as r:
    r.raise_for_status()
    with open("arpa.txt.gz", "wb") as f:
        for chunk in r.iter_content(chunk_size=128*1024):
            f.write(chunk)
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class FileDownloader {
    public static void main(String[] args) throws Exception {
        URL url = new URL("https://allzonefiles.io/api/v1/zones/arpa/dl");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        connection.setRequestMethod("GET");
        // Replace with your API key
        connection.setRequestProperty("Authorization", "Bearer allzfio_5c1572d016b846ce99ce7a177922ff21");

        try (InputStream in = connection.getInputStream();
             FileOutputStream out = new FileOutputStream("arpa.txt.gz")) {

            byte[] buffer = new byte[8192];
            int bytesRead;
            while ((bytesRead = in.read(buffer)) != -1) {
                out.write(buffer, 0, bytesRead);
            }
        }

        System.out.println("Download complete!");
    }
}

Coverage and methodology for .ARPA data

The downloadable file contains domain names from available sources, one per line in gzip-compressed plain text. It is a domain list, not a raw DNS zone file containing resource records, a WHOIS export, or a verified list of active websites.

Coverage depends on the zone and source availability. The dataset count does not guarantee every registered .ARPA domain. Additions and removals describe observed changes between dataset observations; source changes and gaps can also affect counts. Verify registration status separately before outreach, security decisions, or domain purchases.

The daily update target is 9 AM UTC. Use each file's snapshot date when scheduling imports or comparing archives; delivery can be affected by source delays. Historical availability varies by zone and date.

For reproducible analysis, record the zone, snapshot date, downloaded filename, and filtering rules. Usage is subject to our dataset license; enterprise and redistribution licensing is available separately.

Use .ARPA domain data in your workflow

Monitor brands and threats

Filter domain names for brand terms and investigate candidates with additional evidence.

Brand monitoring with Python · Security analysis

Study namespace changes

Compare dated snapshots to measure observed growth and removals.

Market intelligence · Reproducible research

Build a domain database

Automate authenticated downloads and import the list into your data pipeline.

Data engineering with Python · API documentation

Compare all domain lists, access historical datasets, or download all available zones in one ZIP.

.ARPA domain list questions

How many .ARPA domains are in the dataset?

The latest list contains 11 domain names, with a snapshot date of 13 Sep 2026. This is our dataset count, not a guarantee of the total number of registered domains.

How do I download the .ARPA domain list?

Sign in with an account that has download access and use Download Full List above, or automate the download with the API examples. Check plans and download limits before subscribing.

What format is the download?

A gzip-compressed plain-text file with one domain name per line. It contains domain names rather than DNS resource records, registration contact details, or website content.

Can I download historical .ARPA lists?

Available dates appear in the historical domain list table. Archive coverage varies, and downloads require historical access. See historical datasets for details.

Are removed domains expired or available to register?

Removal from an observed list does not establish expiration or availability. Check current registry or registrar information before attempting to register a name. The same limitation applies to expired / removed domain datasets.

When is the dataset updated?

All datasets have a daily update target of 9 AM UTC. Check the displayed snapshot date because source availability and delivery delays can affect individual files.