Associated Domain Finder Examples · Example 7 of 11 in One Association Type

Same Name Servers in WHOIS

GEThttps://api.deepinfo.com/v1/discovery/associated-domain-finder

The domains whose WHOIS record names the same name servers as wikipedia.org (ns0.wikimedia.org to ns2.wikimedia.org): 955.

Param: association domain
Value: whois_ns wikipedia.org

association=whois_ns compares the name servers listed in the WHOIS record, which the registry publishes.

The API found 955 domains on ns0, ns1 and ns2.wikimedia.org, such as se.wiki and wikiversity.community. The WHOIS list can differ from the live DNS: the first record shown has no DNS data at all.

In the response, look at results[].domain.whois.name_servers and results[].dns.ns.

Request

curl

curl 'https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=wikipedia.org&association=whois_ns&page_size=25' \
  -H 'apikey: YOUR_API_KEY' \
  -H 'Accept: application/json'

Python

import requests

url = "https://api.deepinfo.com/v1/discovery/associated-domain-finder"

params = {
    "domain": "wikipedia.org",
    "association": "whois_ns",
    "page_size": "25"
}

headers = {
    "apikey": "YOUR_API_KEY",
    "Accept": "application/json"
}

response = requests.get(url, params=params, headers=headers)
response.raise_for_status()
print(response.json())

JavaScript

const url = "https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=wikipedia.org&association=whois_ns&page_size=25";

const response = await fetch(url, {
  method: "GET",
  headers: {
    "apikey": "YOUR_API_KEY",
    "Accept": "application/json"
  },
});

const data = await response.json();
console.log(data);

package main

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

func main() {
	req, err := http.NewRequest("GET", "https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=wikipedia.org&association=whois_ns&page_size=25", nil)
	if err != nil {
		panic(err)
	}
	req.Header.Set("apikey", "YOUR_API_KEY")
	req.Header.Set("Accept", "application/json")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	body, err := io.ReadAll(res.Body)
	if err != nil {
		panic(err)
	}
	fmt.Println(string(body))
}

Java

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=wikipedia.org&association=whois_ns&page_size=25"))
            .header("apikey", "YOUR_API_KEY")
            .header("Accept", "application/json")
            .GET()
            .build();

        HttpResponse<String> response = HttpClient.newHttpClient()
            .send(request, HttpResponse.BodyHandlers.ofString());

        System.out.println(response.body());
    }
}

using System;
using System.Net.Http;

using var client = new HttpClient();

var request = new HttpRequestMessage(HttpMethod.Get, "https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=wikipedia.org&association=whois_ns&page_size=25");
request.Headers.Add("apikey", "YOUR_API_KEY");
request.Headers.Add("Accept", "application/json");

using var response = await client.SendAsync(request);
Console.WriteLine(await response.Content.ReadAsStringAsync());

PHP

<?php

$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_URL => 'https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=wikipedia.org&association=whois_ns&page_size=25',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'apikey: YOUR_API_KEY',
        'Accept: application/json',
    ],
]);

$response = curl_exec($curl);

if ($response === false) {
    throw new RuntimeException(curl_error($curl));
}

echo $response . PHP_EOL;

Ruby

require 'net/http'
require 'uri'

uri = URI('https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=wikipedia.org&association=whois_ns&page_size=25')

request = Net::HTTP::Get.new(uri)
request['apikey'] = 'YOUR_API_KEY'
request['Accept'] = 'application/json'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: uri.scheme == 'https') do |http|
  http.request(request)
end

puts response.body

Response

200 OK · application/json

Shortened for this page: results: 3 of 25 shown; results[].webdata.http.headers.others: first 10 items

Response Body

{
  "page": 1,
  "page_size": 25,
  "result_count": 955,
  "results": [
    {
      "punycode": "se.wiki",
      "unicode": "se.wiki",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "se",
        "unicode": "se",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": false,
        "length": 2,
        "lang": "cs",
        "keywords": [
          "se"
        ],
        "keyword_count": 1,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "se.wiki",
        "unicode": "se.wiki",
        "is_idn": false,
        "name": {
          "punycode": "se",
          "unicode": "se",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": false,
          "length": 2,
          "lang": "cs",
          "keywords": [
            "se"
          ],
          "keyword_count": 1
        },
        "extension": {
          "punycode": "wiki",
          "unicode": "wiki",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "wiki",
          "unicode": "wiki",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 1,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2015-03-03T09:27:38Z",
          "update_date": "2025-10-20T18:34:29Z",
          "expiry_date": "2027-03-03T23:59:59Z",
          "registrar": "porkbun",
          "registrant": {
            "name": "redacted for privacy",
            "organization": "wikimedia foundation, inc.",
            "street": "redacted for privacy",
            "city": "redacted for privacy",
            "state": "california",
            "postal_code": "redacted for privacy",
            "country": "us",
            "phone": "redacted for privacy",
            "email": null
          },
          "name_servers": [
            "ns0.wikimedia.org",
            "ns1.wikimedia.org",
            "ns2.wikimedia.org"
          ],
          "domain_status": [
            "clientdeleteprohibited",
            "clienttransferprohibited"
          ],
          "whois_server": "https://porkbun.com/whois",
          "check_date": "2026-04-30T00:04:44Z"
        },
        "whois_normalized": {
          "registrant": {
            "organization": "wikimediafoundationinc",
            "phone": null,
            "email": null,
            "email_fqdn_apex": null,
            "email_domain_apex": null
          }
        },
        "whois_last_check_date": "2026-04-30T00:04:44Z",
        "whois_create_date_historical": [
          "2015-03-03T09:27:38Z"
        ],
        "whois_last_change_date": "2025-10-23T11:16:24Z",
        "whois_registrant_email_historical": [
          "please query the rdds service of the registrar of record identified in this output for information on how to contact the registrant, admin, or tech contact of the queried domain name."
        ],
        "whois_privacy_enabled": true,
        "dns": null,
        "dns_last_change_date": "2023-04-13T10:59:14Z",
        "ip_history": [],
        "ssl": null,
        "ssl_last_change_date": null
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": null,
      "dns_last_change_date": "2023-04-13T10:59:14Z",
      "ip_history": [],
      "ssl": null,
      "ssl_last_change_date": null,
      "webdata": {
        "connection_status": "not_resolved",
        "html": null,
        "http": null
      }
    },
    {
      "punycode": "wikiversity.community",
      "unicode": "wikiversity.community",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "wikiversity",
        "unicode": "wikiversity",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": false,
        "length": 11,
        "lang": "en",
        "keywords": [
          "wikiversity"
        ],
        "keyword_count": 1,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "wikiversity.community",
        "unicode": "wikiversity.community",
        "is_idn": false,
        "name": {
          "punycode": "wikiversity",
          "unicode": "wikiversity",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": false,
          "length": 11,
          "lang": "en",
          "keywords": [
            "wikiversity"
          ],
          "keyword_count": 1
        },
        "extension": {
          "punycode": "community",
          "unicode": "community",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "community",
          "unicode": "community",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 1,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2014-06-18T16:00:09Z",
          "update_date": "2026-05-22T09:27:58Z",
          "expiry_date": "2027-06-18T16:00:09Z",
          "registrar": "markmonitor inc.",
          "registrant": {
            "name": null,
            "organization": null,
            "street": null,
            "city": null,
            "state": null,
            "postal_code": null,
            "country": null,
            "phone": null,
            "email": null
          },
          "name_servers": [
            "ns0.wikimedia.org",
            "ns1.wikimedia.org",
            "ns2.wikimedia.org"
          ],
          "domain_status": [
            "clientdeleteprohibited",
            "clienttransferprohibited",
            "clientupdateprohibited"
          ],
          "whois_server": null,
          "check_date": "2026-06-04T13:31:21Z"
        },
        "whois_normalized": {
          "registrant": null
        },
        "whois_last_check_date": "2026-06-04T13:31:21Z",
        "whois_create_date_historical": [
          "2014-06-18T16:00:09Z"
        ],
        "whois_last_change_date": "2026-06-04T13:31:42Z",
        "whois_registrant_email_historical": [
          "user@wikimedia.org",
          "please query the rdds service of the registrar of record identified in this output for information on how to contact the registrant, admin, or tech contact of the queried domain name."
        ],
        "whois_privacy_enabled": null,
        "dns": {
          "a": {
            "update_date": "2026-05-26T17:27:36Z",
            "ip_addresses": [
              "208.80.153.232"
            ]
          }
        },
        "dns_last_change_date": "2026-04-10T05:21:48Z",
        "ip_history": [
          "208.80.154.232",
          "208.80.153.232"
        ],
        "ssl": null,
        "ssl_last_change_date": null
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-05-26T17:27:36Z",
          "ip_addresses": [
            "208.80.153.232"
          ]
        },
        "aaaa": {
          "update_date": "2026-05-26T17:27:36Z",
          "ip_addresses": [
            "2620:0:860:ed1a::9"
          ]
        },
        "ns": {
          "update_date": "2026-05-26T17:27:36Z",
          "name_servers": [
            "ns0.wikimedia.org",
            "ns1.wikimedia.org",
            "ns2.wikimedia.org"
          ]
        },
        "mx": {
          "update_date": "2026-05-26T17:27:36Z",
          "mail_servers": []
        },
        "soa": {
          "update_date": "2026-05-26T17:27:36Z",
          "mnames": [
            "ns0.wikimedia.org"
          ],
          "rnames": [
            "hostmaster.wikimedia.org"
          ],
          "rname_emails": [
            "user@wikimedia.org"
          ]
        },
        "txt": {
          "update_date": "2026-05-26T17:27:36Z",
          "values": [
            "\"v=spf1 -all\""
          ]
        },
        "cname": {
          "update_date": "2026-05-26T17:27:36Z",
          "values": []
        },
        "others": []
      },
      "dns_last_change_date": "2026-04-10T05:21:46Z",
      "ip_history": [
        "208.80.154.232",
        "208.80.153.232"
      ],
      "ssl": null,
      "ssl_last_change_date": null,
      "webdata": {
        "connection_status": "success",
        "html": {
          "source_code_hash": "b6efc6f964e0c9b15fe287d09202e0e7a07d9ed25094d391f4e7208f28d1010e"
        },
        "http": {
          "status_code_first": 301,
          "status_code_last": 200,
          "redirection_history": [
            {
              "url": "http://wikiversity.community/",
              "status_code": 301
            },
            {
              "url": "https://wikiversity.community/",
              "status_code": 301
            },
            {
              "url": "https://www.wikiversity.org/",
              "status_code": 200
            }
          ],
          "external_redirection": true,
          "final_url": "https://www.wikiversity.org/",
          "final_fqdn": "www.wikiversity.org",
          "final_domain": "wikiversity.org",
          "headers": {
            "others": [
              {
                "name": "date",
                "value": "Wed, 03 Jun 2026 13:55:37 GMT"
              },
              {
                "name": "etag",
                "value": "W/\"ec6f-65331e6be5480\""
              },
              {
                "name": "age",
                "value": "20895"
              },
              {
                "name": "accept_ranges",
                "value": "bytes"
              },
              {
                "name": "x_cache",
                "value": "cp2053 hit, cp2053 hit/303"
              },
              {
                "name": "x_cache_status",
                "value": "hit-front"
              },
              {
                "name": "server_timing",
                "value": "cache;desc=\"hit-front\", host;desc=\"cp2053\""
              },
              {
                "name": "report_to",
                "value": "{ \"group\": \"wm_nel\", \"max_age\": 604800, \"endpoints\": [{ \"url\": \"https://intake-logging.wikimedia.org/v1/events?stream=w3c.reportingapi.network_error&schema_uri=/w3c/reportingapi/network_error/1.0.0\" }] }"
              },
              {
                "name": "nel",
                "value": "{ \"report_to\": \"wm_nel\", \"max_age\": 604800, \"failure_fraction\": 0.05, \"success_fraction\": 0.0}"
              },
              {
                "name": "x_client_ip",
                "value": "34.9.202.247"
              }
            ],
            "access_control_allow_headers": null,
            "access_control_allow_methods": null,
            "access_control_allow_origin": null,
            "cache_control": "s-maxage=86400, must-revalidate, max-age=3600",
            "clear_site_data": null,
            "content_encoding": "gzip",
            "content_security_policy": null,
            "content_type": "text/html",
            "cross_origin_embedder_policy": null,
            "cross_origin_opener_policy": null,
            "cross_origin_resource_policy": null,
            "expect_ct": null,
            "feature_policy": null,
            "last_modified": "Mon, 01 Jun 2026 14:20:50 GMT",
            "permission_policy": null,
            "referrer_policy": null,
            "server": "ATS/9.2.13",
            "set_cookie": "WMF-Last-Access=<value>;Path=/;HttpOnly;secure;Expires=Sun, 05 Jul 2026 12:00:00 GMT, WMF-Last-Access-Global=<value>;Path=/;Domain=.wikiversity.org;HttpOnly;secure;Expires=Sun, 05 Jul 2026 12:00:00 GMT, GeoIP=<value>; Path=/; secure; Domain=.wikiversity.org, NetworkProbeLimit=<value>;Path=/;Secure;SameSite=None;Max-Age=3600, WMF-Uniq=<value>;Domain=.wikiversity.org;Path=/;HttpOnly;secure;SameSite=None;Expires=Thu, 03 Jun 2027 00:00:00 GMT",
            "strict_transport_security": "max-age=106384710; includeSubDomains; preload",
            "x_content_type_options": null,
            "x_download_options": null,
            "x_frame_options": null,
            "x_permitted_cross_domain_policies": null,
            "x_powered_by": null,
            "x_xss_protection": null
          },
          "cookies": [
            {
              "name": "GeoIP",
              "value": "<value>"
            },
            {
              "name": "WMF-Last-Access-Global",
              "value": "<value>"
            },
            {
              "name": "WMF-Uniq",
              "value": "<value>"
            },
            {
              "name": "NetworkProbeLimit",
              "value": "<value>"
            },
            {
              "name": "WMF-Last-Access",
              "value": "<value>"
            }
          ]
        }
      }
    },
    {
      "punycode": "wikimediadns.org",
      "unicode": "wikimediadns.org",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "wikimediadns",
        "unicode": "wikimediadns",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": false,
        "length": 12,
        "lang": "de",
        "keywords": [
          "wikimedia",
          "dns"
        ],
        "keyword_count": 2,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "wikimediadns.org",
        "unicode": "wikimediadns.org",
        "is_idn": false,
        "name": {
          "punycode": "wikimediadns",
          "unicode": "wikimediadns",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": false,
          "length": 12,
          "lang": "de",
          "keywords": [
            "wikimedia",
            "dns"
          ],
          "keyword_count": 2
        },
        "extension": {
          "punycode": "org",
          "unicode": "org",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "org",
          "unicode": "org",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 1,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2020-12-15T18:52:00Z",
          "update_date": "2025-11-18T09:30:02Z",
          "expiry_date": "2026-12-15T18:52:00Z",
          "registrar": "markmonitor inc.",
          "registrant": {
            "name": null,
            "organization": null,
            "street": null,
            "city": null,
            "state": null,
            "postal_code": null,
            "country": null,
            "phone": null,
            "email": null
          },
          "name_servers": [
            "ns0.wikimedia.org",
            "ns1.wikimedia.org",
            "ns2.wikimedia.org"
          ],
          "domain_status": [
            "clientdeleteprohibited",
            "clienttransferprohibited",
            "clientupdateprohibited"
          ],
          "whois_server": "whois.markmonitor.com",
          "check_date": "2026-06-13T15:31:47Z"
        },
        "whois_normalized": {
          "registrant": null
        },
        "whois_last_check_date": "2026-06-13T15:31:47Z",
        "whois_create_date_historical": [
          "2020-12-15T18:52:00Z"
        ],
        "whois_last_change_date": "2025-12-05T07:05:40Z",
        "whois_registrant_email_historical": [
          "please query the rdds service of the registrar of record identified in this output for information on how to contact the registrant, admin, or tech contact of the queried domain name.",
          "redacted"
        ],
        "whois_privacy_enabled": null,
        "dns": {
          "a": {
            "update_date": "2026-08-06T10:54:16Z",
            "ip_addresses": [
              "208.80.153.232"
            ]
          }
        },
        "dns_last_change_date": "2026-04-06T02:23:55Z",
        "ip_history": [
          "208.80.153.232",
          "208.80.154.232",
          "198.35.26.98"
        ],
        "ssl": null,
        "ssl_last_change_date": null
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-08-06T10:54:16Z",
          "ip_addresses": [
            "208.80.153.232"
          ]
        },
        "aaaa": {
          "update_date": "2026-08-06T10:54:16Z",
          "ip_addresses": [
            "2620:0:860:ed1a::9"
          ]
        },
        "ns": {
          "update_date": "2026-08-06T10:54:16Z",
          "name_servers": [
            "ns0.wikimedia.org",
            "ns1.wikimedia.org",
            "ns2.wikimedia.org"
          ]
        },
        "mx": {
          "update_date": "2026-08-06T10:54:16Z",
          "mail_servers": []
        },
        "soa": {
          "update_date": "2026-08-06T10:54:16Z",
          "mnames": [
            "ns0.wikimedia.org"
          ],
          "rnames": [
            "hostmaster.wikimedia.org"
          ],
          "rname_emails": [
            "user@wikimedia.org"
          ]
        },
        "txt": {
          "update_date": "2026-08-06T10:54:16Z",
          "values": [
            "\"v=spf1 -all\""
          ]
        },
        "cname": {
          "update_date": "2026-08-06T10:54:16Z",
          "values": []
        },
        "others": [
          {
            "update_date": "2023-04-17T12:12:19Z",
            "values": [
              "\"RFC8482\" \"\""
            ],
            "type": "HINFO"
          }
        ]
      },
      "dns_last_change_date": "2026-04-06T02:23:55Z",
      "ip_history": [
        "208.80.153.232",
        "208.80.154.232",
        "198.35.26.98"
      ],
      "ssl": null,
      "ssl_last_change_date": null,
      "webdata": {
        "connection_status": "not_resolved",
        "html": null,
        "http": null
      }
    }
  ],
  "domain": "wikipedia.org",
  "requested_association_parameters": [
    "whois_ns"
  ],
  "applied_association_parameters": [
    "whois_ns"
  ]
}

Content-Type: application/json
ratelimit-limit: 10
ratelimit-remaining: 2
ratelimit-reset: 51
x-ratelimit-limit-minute: 10
x-ratelimit-remaining-minute: 2
deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a

Request

What this example sends. Every parameter is documented on Associated Domain Finder; the exact request is in the code panel.

Parameter	Value
`domain`query	`wikipedia.org`
`association`query	`whois_ns`
`page_size`query	`25`

Reference updated September 26, 2026

Request

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