Associated Domain Finder Examples · Example 2 of 11 in One Association Type

Same Registrant E-mail Domain

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

The domains whose registrant e-mail is at the same domain as that of cloudflare.co.at (cloudflare.com): 17,045.

Param: association domain
Value: whois_registrant_email_apex_normalized cloudflare.co.at

association=whois_registrant_email_apex_normalized compares only the e-mail domain (domain.whois_normalized.registrant.email_domain_apex), here cloudflare.com.

The total grows from 2 to 17,045: any address at cloudflare.com counts. The first record shown uses support@cloudflare.com. Where the registrant is a person, this page redacts the whole contact, the e-mail domain included, so some records read REDACTED FOR PRIVACY.

In the response, look at result_count and results[].domain.whois_normalized.registrant.email_domain_apex.

Request

curl

curl 'https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=cloudflare.co.at&association=whois_registrant_email_apex_normalized&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": "cloudflare.co.at",
    "association": "whois_registrant_email_apex_normalized",
    "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=cloudflare.co.at&association=whois_registrant_email_apex_normalized&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=cloudflare.co.at&association=whois_registrant_email_apex_normalized&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=cloudflare.co.at&association=whois_registrant_email_apex_normalized&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=cloudflare.co.at&association=whois_registrant_email_apex_normalized&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=cloudflare.co.at&association=whois_registrant_email_apex_normalized&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=cloudflare.co.at&association=whois_registrant_email_apex_normalized&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; results[].domain.ip_history: first 10 items; results[].ip_history: first 10 items

Response Body

{
  "page": 1,
  "page_size": 25,
  "result_count": 17045,
  "results": [
    {
      "punycode": "litigationservices.us",
      "unicode": "litigationservices.us",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "litigationservices",
        "unicode": "litigationservices",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": false,
        "length": 18,
        "lang": "en",
        "keywords": [
          "litigation",
          "services"
        ],
        "keyword_count": 2,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "litigationservices.us",
        "unicode": "litigationservices.us",
        "is_idn": false,
        "name": {
          "punycode": "litigationservices",
          "unicode": "litigationservices",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": false,
          "length": 18,
          "lang": "en",
          "keywords": [
            "litigation",
            "services"
          ],
          "keyword_count": 2
        },
        "extension": {
          "punycode": "us",
          "unicode": "us",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "us",
          "unicode": "us",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 2,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2022-05-12T17:19:51Z",
          "update_date": "2026-04-17T04:11:09Z",
          "expiry_date": "2027-05-12T17:19:51Z",
          "registrar": "cloudflare, inc.",
          "registrant": {
            "name": "REDACTED FOR PRIVACY",
            "organization": null,
            "street": "REDACTED FOR PRIVACY",
            "city": "san francisco",
            "state": "california",
            "postal_code": "REDACTED FOR PRIVACY",
            "country": "pr",
            "phone": "REDACTED FOR PRIVACY",
            "email": "support@cloudflare.com"
          },
          "name_servers": [
            "hasslo.ns.cloudflare.com",
            "monika.ns.cloudflare.com"
          ],
          "domain_status": [
            "serverupdateprohibited"
          ],
          "whois_server": "whois.cloudflare.com",
          "check_date": "2026-04-27T03:56:20Z"
        },
        "whois_normalized": {
          "registrant": {
            "organization": null,
            "phone": "REDACTED FOR PRIVACY",
            "email": "support@cloudflare.com",
            "email_fqdn_apex": "cloudflare.com",
            "email_domain_apex": "cloudflare.com"
          }
        },
        "whois_last_check_date": "2026-04-27T03:56:20Z",
        "whois_create_date_historical": [
          "2022-05-12T17:19:51Z"
        ],
        "whois_last_change_date": "2026-04-26T11:06:27Z",
        "whois_registrant_email_historical": [
          "support@cloudflare.com"
        ],
        "whois_privacy_enabled": false,
        "dns": {
          "a": {
            "update_date": "2026-09-21T11:35:07Z",
            "ip_addresses": [
              "104.21.84.54",
              "172.67.186.149"
            ]
          }
        },
        "dns_last_change_date": "2026-09-21T11:39:04Z",
        "ip_history": [
          "104.21.92.109",
          "172.67.192.20",
          "172.64.80.1",
          "104.21.84.54",
          "172.67.186.149"
        ],
        "ssl": {
          "validity": {
            "start_date": "2026-07-18T20:21:30Z",
            "end_date": "2026-10-16T21:19:54Z"
          },
          "serial_number": "324110141076624637569544599978519970181",
          "check_date": "2026-08-16T00:11:20Z"
        },
        "ssl_last_change_date": "2026-08-16T00:13:26Z"
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-09-21T11:35:07Z",
          "ip_addresses": [
            "104.21.84.54",
            "172.67.186.149"
          ]
        },
        "aaaa": {
          "update_date": "2026-09-21T11:35:07Z",
          "ip_addresses": [
            "2606:4700:3033::ac43:ba95",
            "2606:4700:3034::6815:5436"
          ]
        },
        "ns": {
          "update_date": "2026-09-21T11:35:07Z",
          "name_servers": [
            "hasslo.ns.cloudflare.com",
            "monika.ns.cloudflare.com"
          ]
        },
        "mx": {
          "update_date": "2026-09-21T11:35:07Z",
          "mail_servers": []
        },
        "soa": {
          "update_date": "2026-09-21T11:35:07Z",
          "mnames": [
            "hasslo.ns.cloudflare.com"
          ],
          "rnames": [
            "dns.cloudflare.com"
          ],
          "rname_emails": [
            "user@cloudflare.com"
          ]
        },
        "txt": {
          "update_date": "2026-09-21T11:35:07Z",
          "values": [
            "\"v=spf1 -all\""
          ]
        },
        "cname": {
          "update_date": "2026-09-21T11:35:07Z",
          "values": []
        },
        "others": []
      },
      "dns_last_change_date": "2026-09-21T11:39:02Z",
      "ip_history": [
        "104.21.92.109",
        "172.67.192.20",
        "172.64.80.1",
        "104.21.84.54",
        "172.67.186.149"
      ],
      "ssl": {
        "tags": [
          "dla"
        ],
        "fqdns": [
          "litigationservices.us"
        ],
        "version": 3,
        "serial_number": "324110141076624637569544599978519970181",
        "fingerprint": {
          "sha256": "5c1ad417990533a114b7754be9e5d48af3280d3fedefb846bf4fe322917459c6",
          "sha1": "d5d6cd55d239cdf4aad690b3db1c279435f2cfff",
          "md5": "a8f736bb12b962d9c93442ddf9dae981"
        },
        "validity": {
          "start_date": "2026-07-18T20:21:30Z",
          "end_date": "2026-10-16T21:19:54Z",
          "length": 7779504
        },
        "signature": {
          "is_self_signed": false,
          "is_valid": true,
          "value": "MEUCIGRRYvy4Iao3umlT1+YEUtFEoUa30zQgCq7K0ZCBS4suAiEAy7sjX7rcjyQ6VEEyiO4RwaHNaT2TyUyyRdeLLcHAEDg=",
          "algorithm": {
            "oid": "1.2.840.10045.4.3.2",
            "name": "sha256"
          }
        },
        "issuer_dn": "CN=WE1,O=Google Trust Services,C=US",
        "issuer": {
          "common_name": "WE1",
          "country": "US",
          "state": null,
          "locality": null,
          "organization": "Google Trust Services",
          "organizational_unit": null
        },
        "subject_dn": "CN=litigationservices.us",
        "subject": {
          "common_name": "litigationservices.us",
          "country": null,
          "state": null,
          "locality": null,
          "organization": null,
          "organizational_unit": null
        },
        "extensions": {
          "authority_key_id": "kHeSNWfE/6jMqeZ72YB5e8yT+Tg=",
          "basic_constraints": {
            "is_ca": false
          },
          "certificate_policies": [
            "2.23.140.1.2.1"
          ],
          "extended_key_usage": {
            "client_auth": null,
            "server_auth": true
          },
          "key_usage": {
            "digital_signature": true,
            "content_commitment": false,
            "key_agreement": false,
            "data_encipherment": false,
            "key_encipherment": false,
            "key_cert_sign": false,
            "crl_sign": false
          },
          "signed_certificate_timestamps": [
            "2026-07-18T21:21:31Z"
          ],
          "subject_alt_name": {
            "dns_names": [
              "litigationservices.us",
              "*.litigationservices.us"
            ]
          },
          "subject_key_id": "O5hoPjzCSvNPaCLwv6yOlLta0EY="
        },
        "check_date": "2026-08-16T00:11:20Z"
      },
      "ssl_last_change_date": "2026-08-16T00:13:23Z",
      "webdata": {
        "connection_status": "success",
        "html": {
          "source_code_hash": "9ec314107ee8b5d96df22868a5b7935b312aa7b6f32c9d8e0a9095553dd62cf5"
        },
        "http": {
          "status_code_first": 301,
          "status_code_last": 403,
          "redirection_history": [
            {
              "url": "http://litigationservices.us/",
              "status_code": 301
            },
            {
              "url": "https://litigationservices.us/",
              "status_code": 301
            },
            {
              "url": "https://www.veritext.com/litigation-services",
              "status_code": 403
            }
          ],
          "external_redirection": true,
          "final_url": "https://www.veritext.com/litigation-services",
          "final_fqdn": "www.veritext.com",
          "final_domain": "veritext.com",
          "headers": {
            "others": [
              {
                "name": "date",
                "value": "Sun, 06 Sep 2026 10:42:34 GMT"
              },
              {
                "name": "transfer_encoding",
                "value": "chunked"
              },
              {
                "name": "connection",
                "value": "close"
              },
              {
                "name": "accept_ch",
                "value": "Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA"
              },
              {
                "name": "cf_mitigated",
                "value": "challenge"
              },
              {
                "name": "critical_ch",
                "value": "Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA"
              },
              {
                "name": "origin_agent_cluster",
                "value": "?1"
              },
              {
                "name": "permissions_policy",
                "value": "accelerometer=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=(),xr-spatial-tracking=*"
              },
              {
                "name": "server_timing",
                "value": "chlray;desc=\"a36cde232f1d11fb\""
              },
              {
                "name": "vary",
                "value": "accept-encoding"
              }
            ],
            "access_control_allow_headers": null,
            "access_control_allow_methods": null,
            "access_control_allow_origin": null,
            "cache_control": null,
            "clear_site_data": null,
            "content_encoding": "gzip",
            "content_security_policy": "default-src 'none'; script-src 'nonce-hglAEiQlIcDFFffQFX29VB' 'unsafe-eval' https://challenges.cloudflare.com; script-src-attr 'none'; style-src 'unsafe-inline'; img-src 'self' https://challenges.cloudflare.com; connect-src 'self' https://challenges.cloudflare.com; frame-src 'self' https://challenges.cloudflare.com blob:; child-src 'self' https://challenges.cloudflare.com blob:; worker-src blob:; form-action http: https:; base-uri 'self'",
            "content_type": "text/html; charset=UTF-8",
            "cross_origin_embedder_policy": "require-corp",
            "cross_origin_opener_policy": "same-origin",
            "cross_origin_resource_policy": "same-origin",
            "expect_ct": null,
            "feature_policy": null,
            "last_modified": null,
            "permission_policy": null,
            "referrer_policy": "same-origin",
            "server": "cloudflare",
            "set_cookie": "__cf_bm=<value>; HttpOnly; SameSite=None; Secure; Path=/; Domain=www.veritext.com; Expires=Sun, 06 Sep 2026 11:12:34 GMT",
            "strict_transport_security": null,
            "x_content_type_options": "nosniff",
            "x_download_options": null,
            "x_frame_options": "SAMEORIGIN",
            "x_permitted_cross_domain_policies": null,
            "x_powered_by": null,
            "x_xss_protection": null
          },
          "cookies": [
            {
              "name": "__cf_bm",
              "value": "<value>"
            }
          ]
        }
      }
    },
    {
      "punycode": "deepgrind.ai",
      "unicode": "deepgrind.ai",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "deepgrind",
        "unicode": "deepgrind",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": false,
        "length": 9,
        "lang": "en",
        "keywords": [
          "deep",
          "grind"
        ],
        "keyword_count": 2,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "deepgrind.ai",
        "unicode": "deepgrind.ai",
        "is_idn": false,
        "name": {
          "punycode": "deepgrind",
          "unicode": "deepgrind",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": false,
          "length": 9,
          "lang": "en",
          "keywords": [
            "deep",
            "grind"
          ],
          "keyword_count": 2
        },
        "extension": {
          "punycode": "ai",
          "unicode": "ai",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "ai",
          "unicode": "ai",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 2,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2025-07-27T21:17:04Z",
          "update_date": "2025-07-27T21:17:04Z",
          "expiry_date": null,
          "registrar": "cloudflare, inc",
          "registrant": {
            "name": "REDACTED FOR PRIVACY",
            "organization": "REDACTED FOR PRIVACY",
            "street": "REDACTED FOR PRIVACY",
            "city": "data redacted",
            "state": "data redacted",
            "postal_code": "REDACTED FOR PRIVACY",
            "country": "at",
            "phone": "REDACTED FOR PRIVACY",
            "email": "REDACTED FOR PRIVACY"
          },
          "name_servers": [
            "aleena.ns.cloudflare.com",
            "quinton.ns.cloudflare.com"
          ],
          "domain_status": [
            "addperiod",
            "clienttransferprohibited"
          ],
          "whois_server": null,
          "check_date": "2025-07-28T04:46:36Z"
        },
        "whois_normalized": {
          "registrant": {
            "organization": "REDACTED FOR PRIVACY",
            "phone": "REDACTED FOR PRIVACY",
            "email": "REDACTED FOR PRIVACY",
            "email_fqdn_apex": "REDACTED FOR PRIVACY",
            "email_domain_apex": "REDACTED FOR PRIVACY"
          }
        },
        "whois_last_check_date": "2025-07-28T04:46:36Z",
        "whois_create_date_historical": [
          "2025-07-27T21:17:04Z"
        ],
        "whois_last_change_date": "2025-07-28T04:47:17Z",
        "whois_registrant_email_historical": [
          "user@cloudflare.com"
        ],
        "whois_privacy_enabled": false,
        "dns": {
          "a": {
            "update_date": "2026-09-21T22:46:38Z",
            "ip_addresses": [
              "3.171.171.13",
              "3.171.171.46",
              "3.171.171.73",
              "3.171.171.119"
            ]
          }
        },
        "dns_last_change_date": "2026-09-21T23:57:49Z",
        "ip_history": [
          "18.154.132.29",
          "18.154.132.88",
          "18.154.132.89",
          "18.154.132.94",
          "18.160.10.28",
          "18.160.10.61",
          "18.160.10.77",
          "18.160.10.99",
          "54.192.55.103",
          "54.192.55.25"
        ],
        "ssl": null,
        "ssl_last_change_date": null
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-09-21T22:46:38Z",
          "ip_addresses": [
            "3.171.171.13",
            "3.171.171.46",
            "3.171.171.73",
            "3.171.171.119"
          ]
        },
        "aaaa": {
          "update_date": "2026-09-21T22:46:38Z",
          "ip_addresses": [
            "2600:9000:28bc:0:1:ef43:d400:93a1",
            "2600:9000:28bc:5a00:1:ef43:d400:93a1",
            "2600:9000:28bc:7e00:1:ef43:d400:93a1",
            "2600:9000:28bc:1800:1:ef43:d400:93a1",
            "2600:9000:28bc:8600:1:ef43:d400:93a1",
            "2600:9000:28bc:9800:1:ef43:d400:93a1",
            "2600:9000:28bc:be00:1:ef43:d400:93a1",
            "2600:9000:28bc:f200:1:ef43:d400:93a1"
          ]
        },
        "ns": {
          "update_date": "2026-09-21T22:46:38Z",
          "name_servers": [
            "aleena.ns.cloudflare.com",
            "quinton.ns.cloudflare.com"
          ]
        },
        "mx": {
          "update_date": "2026-09-21T22:46:38Z",
          "mail_servers": []
        },
        "soa": {
          "update_date": "2026-09-21T22:46:38Z",
          "mnames": [
            "aleena.ns.cloudflare.com"
          ],
          "rnames": [
            "dns.cloudflare.com"
          ],
          "rname_emails": [
            "user@cloudflare.com"
          ]
        },
        "txt": {
          "update_date": "2026-09-21T22:46:38Z",
          "values": []
        },
        "cname": {
          "update_date": "2026-09-21T22:46:38Z",
          "values": []
        },
        "others": []
      },
      "dns_last_change_date": "2026-09-21T23:57:47Z",
      "ip_history": [
        "18.154.132.29",
        "18.154.132.88",
        "18.154.132.89",
        "18.154.132.94",
        "18.160.10.28",
        "18.160.10.61",
        "18.160.10.77",
        "18.160.10.99",
        "54.192.55.103",
        "54.192.55.25"
      ],
      "ssl": null,
      "ssl_last_change_date": null,
      "webdata": {
        "connection_status": "success",
        "html": {
          "source_code_hash": "5d8585b91e60eff15af162568b2e56f5f75aa8a01a9ffa25fc694fb297a03a72"
        },
        "http": {
          "status_code_first": 301,
          "status_code_last": 200,
          "redirection_history": [
            {
              "url": "http://deepgrind.ai/",
              "status_code": 301
            },
            {
              "url": "https://deepgrind.ai/",
              "status_code": 200
            }
          ],
          "external_redirection": false,
          "final_url": "https://deepgrind.ai/",
          "final_fqdn": "deepgrind.ai",
          "final_domain": "deepgrind.ai",
          "headers": {
            "others": [
              {
                "name": "content_length",
                "value": "476"
              },
              {
                "name": "connection",
                "value": "keep-alive"
              },
              {
                "name": "date",
                "value": "Wed, 19 Aug 2026 07:49:35 GMT"
              },
              {
                "name": "etag",
                "value": "\"b806f951ec45ba8f72d6d3e6a43aa87b\""
              },
              {
                "name": "x_amz_server_side_encryption",
                "value": "AES256"
              },
              {
                "name": "x_amz_version_id",
                "value": "BTKCzbhk0GIKIE43Pme.fvXj9_TWb7hj"
              },
              {
                "name": "accept_ranges",
                "value": "bytes"
              },
              {
                "name": "x_cache",
                "value": "Miss from cloudfront"
              },
              {
                "name": "via",
                "value": "1.1 78d212b6ae895020309793d6a3a34d04.cloudfront.net (CloudFront)"
              },
              {
                "name": "x_amz_cf_pop",
                "value": "DFW57-P7"
              }
            ],
            "access_control_allow_headers": null,
            "access_control_allow_methods": null,
            "access_control_allow_origin": null,
            "cache_control": "no-cache,no-store,must-revalidate",
            "clear_site_data": null,
            "content_encoding": null,
            "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": "Sun, 10 May 2026 18:07:51 GMT",
            "permission_policy": null,
            "referrer_policy": null,
            "server": "AmazonS3",
            "set_cookie": null,
            "strict_transport_security": null,
            "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": []
        }
      }
    },
    {
      "punycode": "sivity.ai",
      "unicode": "sivity.ai",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "sivity",
        "unicode": "sivity",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": false,
        "length": 6,
        "lang": "en",
        "keywords": [
          "sivi",
          "ty"
        ],
        "keyword_count": 2,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "sivity.ai",
        "unicode": "sivity.ai",
        "is_idn": false,
        "name": {
          "punycode": "sivity",
          "unicode": "sivity",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": false,
          "length": 6,
          "lang": "en",
          "keywords": [
            "sivi",
            "ty"
          ],
          "keyword_count": 2
        },
        "extension": {
          "punycode": "ai",
          "unicode": "ai",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "ai",
          "unicode": "ai",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 2,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
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          "update_date": "2025-07-15T18:45:25Z",
          "expiry_date": null,
          "registrar": "cloudflare, inc",
          "registrant": {
            "name": "REDACTED FOR PRIVACY",
            "organization": "REDACTED FOR PRIVACY",
            "street": "REDACTED FOR PRIVACY",
            "city": "data redacted",
            "state": "data redacted",
            "postal_code": "REDACTED FOR PRIVACY",
            "country": "nz",
            "phone": "REDACTED FOR PRIVACY",
            "email": "REDACTED FOR PRIVACY"
          },
          "name_servers": [
            "bailey.ns.cloudflare.com",
            "zod.ns.cloudflare.com"
          ],
          "domain_status": [
            "addperiod",
            "clienttransferprohibited"
          ],
          "whois_server": null,
          "check_date": "2025-07-18T00:20:12Z"
        },
        "whois_normalized": {
          "registrant": {
            "organization": "REDACTED FOR PRIVACY",
            "phone": "REDACTED FOR PRIVACY",
            "email": "REDACTED FOR PRIVACY",
            "email_fqdn_apex": "REDACTED FOR PRIVACY",
            "email_domain_apex": "REDACTED FOR PRIVACY"
          }
        },
        "whois_last_check_date": "2025-07-18T00:20:12Z",
        "whois_create_date_historical": [
          "2025-07-15T18:45:25Z"
        ],
        "whois_last_change_date": "2025-07-18T00:21:05Z",
        "whois_registrant_email_historical": [
          "user@cloudflare.com"
        ],
        "whois_privacy_enabled": false,
        "dns": {
          "a": {
            "update_date": "2026-09-21T20:07:51Z",
            "ip_addresses": []
          }
        },
        "dns_last_change_date": "2026-09-21T21:23:04Z",
        "ip_history": [
          "104.21.82.198",
          "172.67.162.215",
          "202.74.197.76"
        ],
        "ssl": null,
        "ssl_last_change_date": "2025-12-11T02:45:04Z"
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-09-21T20:07:51Z",
          "ip_addresses": []
        },
        "aaaa": {
          "update_date": "2026-09-21T20:07:51Z",
          "ip_addresses": []
        },
        "ns": {
          "update_date": "2026-09-21T20:07:51Z",
          "name_servers": [
            "bailey.ns.cloudflare.com",
            "zod.ns.cloudflare.com"
          ]
        },
        "mx": {
          "update_date": "2026-09-21T20:07:51Z",
          "mail_servers": [
            "mail.protonmail.ch",
            "mailsec.protonmail.ch"
          ]
        },
        "soa": {
          "update_date": "2026-09-21T20:07:51Z",
          "mnames": [
            "bailey.ns.cloudflare.com"
          ],
          "rnames": [
            "dns.cloudflare.com"
          ],
          "rname_emails": [
            "user@cloudflare.com"
          ]
        },
        "txt": {
          "update_date": "2026-09-21T20:07:51Z",
          "values": [
            "\"protonmail-verification=4e2088c3d52a793872af0a7f5c36b2c2b5145597\"",
            "\"v=spf1 include:_spf.protonmail.ch ~all\""
          ]
        },
        "cname": {
          "update_date": "2026-09-21T20:07:51Z",
          "values": []
        },
        "others": []
      },
      "dns_last_change_date": "2026-09-21T21:23:01Z",
      "ip_history": [
        "104.21.82.198",
        "172.67.162.215",
        "202.74.197.76"
      ],
      "ssl": null,
      "ssl_last_change_date": "2025-12-11T02:45:02Z",
      "webdata": {
        "connection_status": "not_resolved",
        "html": null,
        "http": null
      }
    }
  ],
  "domain": "cloudflare.co.at",
  "requested_association_parameters": [
    "whois_registrant_email_apex_normalized"
  ],
  "applied_association_parameters": [
    "whois_registrant_email_apex_normalized"
  ]
}

Content-Type: application/json
ratelimit-limit: 10
ratelimit-remaining: 8
ratelimit-reset: 13
x-ratelimit-limit-minute: 10
x-ratelimit-remaining-minute: 8
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	`cloudflare.co.at`
`association`query	`whois_registrant_email_apex_normalized`
`page_size`query	`25`

Reference updated September 26, 2026

Request

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