Associated Domain Finder Examples · Example 2 of 2 in Several Association Types

Two Association Types, Both Must Match

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

Registrant organization and certificate organization, both required (strict=true): 63 domains for paypal.com.

Param: association strict domain
Value: whois_registrant_organization,ssl_subject_organization true paypal.com

Combines whois_registrant_organization and ssl_subject_organization with strict=true: a domain must match both.

The API found 63 domains, fewer than either type alone (3,187 and 178). The records shown are registered to paypal inc. and carry PayPal, Inc. in their certificate, such as paypal-information.com and joinhoney.org.

In the response, look at results[].domain.whois.registrant.organization and results[].ssl.subject.organization.

Request

curl

curl 'https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=paypal.com&association=whois_registrant_organization%2Cssl_subject_organization&strict=true&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": "paypal.com",
    "association": "whois_registrant_organization,ssl_subject_organization",
    "strict": "true",
    "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=paypal.com&association=whois_registrant_organization%2Cssl_subject_organization&strict=true&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=paypal.com&association=whois_registrant_organization%2Cssl_subject_organization&strict=true&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=paypal.com&association=whois_registrant_organization%2Cssl_subject_organization&strict=true&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=paypal.com&association=whois_registrant_organization%2Cssl_subject_organization&strict=true&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=paypal.com&association=whois_registrant_organization%2Cssl_subject_organization&strict=true&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=paypal.com&association=whois_registrant_organization%2Cssl_subject_organization&strict=true&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[].ssl.fqdns: first 10 items; results[].ssl.extensions.subject_alt_name.dns_names: first 10 items; results[].webdata.http.headers.others: first 10 items

Response Body

{
  "page": 1,
  "page_size": 25,
  "result_count": 63,
  "results": [
    {
      "punycode": "paypal-information.com",
      "unicode": "paypal-information.com",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "paypal-information",
        "unicode": "paypal-information",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": true,
        "length": 18,
        "lang": "en",
        "keywords": [
          "paypal",
          "information"
        ],
        "keyword_count": 2,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "paypal-information.com",
        "unicode": "paypal-information.com",
        "is_idn": false,
        "name": {
          "punycode": "paypal-information",
          "unicode": "paypal-information",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": true,
          "length": 18,
          "lang": "en",
          "keywords": [
            "paypal",
            "information"
          ],
          "keyword_count": 2
        },
        "extension": {
          "punycode": "com",
          "unicode": "com",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "com",
          "unicode": "com",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 1,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2013-09-09T18:11:11Z",
          "update_date": "2026-08-08T11:29:42Z",
          "expiry_date": "2027-09-09T18:11:11Z",
          "registrar": "markmonitor inc.",
          "registrant": {
            "name": "REDACTED FOR PRIVACY",
            "organization": "paypal inc.",
            "street": null,
            "city": null,
            "state": null,
            "postal_code": null,
            "country": "us",
            "phone": null,
            "email": "REDACTED FOR PRIVACY"
          },
          "name_servers": [
            "ns1-pchnet.paypal.com",
            "ns2-pchnet.paypal.com",
            "pdns100.ultradns.com",
            "pdns100.ultradns.net"
          ],
          "domain_status": [
            "clientdeleteprohibited",
            "clienttransferprohibited",
            "clientupdateprohibited"
          ],
          "whois_server": "whois.markmonitor.com",
          "check_date": "2026-08-24T10:03:15Z"
        },
        "whois_normalized": {
          "registrant": {
            "organization": "paypalinc",
            "phone": null,
            "email": null,
            "email_fqdn_apex": null,
            "email_domain_apex": null
          }
        },
        "whois_last_check_date": "2026-08-24T10:03:15Z",
        "whois_create_date_historical": [
          "2013-09-09T18:11:11Z"
        ],
        "whois_last_change_date": "2026-08-21T07:18:25Z",
        "whois_registrant_email_historical": [
          "select request email form at https://domains.markmonitor.com/whois/paypal-information.com",
          "user@paypal.com"
        ],
        "whois_privacy_enabled": true,
        "dns": {
          "a": {
            "update_date": "2026-09-10T03:45:08Z",
            "ip_addresses": [
              "151.101.3.1",
              "151.101.67.1",
              "162.159.141.96"
            ]
          }
        },
        "dns_last_change_date": "2026-09-09T16:21:09Z",
        "ip_history": [
          "64.4.250.38",
          "64.4.250.39",
          "151.101.3.1",
          "151.101.67.1",
          "192.229.210.155",
          "162.159.141.96"
        ],
        "ssl": {
          "validity": {
            "start_date": "2026-05-11T00:00:00Z",
            "end_date": "2026-11-25T23:59:59Z"
          },
          "serial_number": "4798075584132047144148270449582636256",
          "check_date": "2026-07-08T05:53:27Z"
        },
        "ssl_last_change_date": "2026-07-07T10:19:24Z"
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-09-10T03:45:08Z",
          "ip_addresses": [
            "151.101.3.1",
            "151.101.67.1",
            "162.159.141.96"
          ]
        },
        "aaaa": {
          "update_date": "2026-09-10T03:45:08Z",
          "ip_addresses": []
        },
        "ns": {
          "update_date": "2026-09-10T03:45:08Z",
          "name_servers": [
            "ns1-pchnet.paypal.com",
            "ns2-pchnet.paypal.com",
            "pdns100.ultradns.com",
            "pdns100.ultradns.net"
          ]
        },
        "mx": {
          "update_date": "2026-09-10T03:45:08Z",
          "mail_servers": [
            "mx1.paypalcorp.com",
            "mx2.paypalcorp.com"
          ]
        },
        "soa": {
          "update_date": "2026-09-10T03:45:08Z",
          "mnames": [
            "ppdns.paypal.com"
          ],
          "rnames": [
            "hostmaster.paypal.com"
          ],
          "rname_emails": [
            "user@paypal.com"
          ]
        },
        "txt": {
          "update_date": "2026-09-10T03:45:08Z",
          "values": [
            "\"v=spf1 -all\""
          ]
        },
        "cname": {
          "update_date": "2026-09-10T03:45:08Z",
          "values": []
        },
        "others": []
      },
      "dns_last_change_date": "2026-09-09T16:21:08Z",
      "ip_history": [
        "64.4.250.38",
        "64.4.250.39",
        "151.101.3.1",
        "151.101.67.1",
        "192.229.210.155",
        "162.159.141.96"
      ],
      "ssl": {
        "tags": [
          "dla"
        ],
        "fqdns": [
          "braintreepayments.com",
          "buyindiaonline.com",
          "cash2india.com",
          "curv.cc",
          "curv.co",
          "fastlane.paypal.com",
          "paypal-australia.com.au",
          "paypal-business.co.uk",
          "paypal-business.com.au",
          "paypal-businesscenter.com"
        ],
        "version": 3,
        "serial_number": "4798075584132047144148270449582636256",
        "fingerprint": {
          "sha256": "6e107db3ac75cc896b0584c8c4e1361ef49d57e5ed8d898473067b8c4360aa50",
          "sha1": "b72698c90ecef9b88777b289d9b062f1a10dd8fe",
          "md5": "9a8839615d59379ff702a6340f23ab59"
        },
        "validity": {
          "start_date": "2026-05-11T00:00:00Z",
          "end_date": "2026-11-25T23:59:59Z",
          "length": 17193599
        },
        "signature": {
          "is_self_signed": false,
          "is_valid": true,
          "value": "U0TKdzDbyBuT2jR9EnUBbQZpXdH/e+fTYKjy30SXs2VeMUQaoVMwP6Vc997leUn2EL9HDKj5v644VQwNlsUB0GTQpUVSc9Wa726AyLiO2+PPmPeNO7mOZQ/SI5++JWeyljFzUYkdc90AcHuazXjzG9oJKlc5NguE4o49QYv1Vni5Wg2IuX4+v0D+4+NfeGhk119EloM6GYaBcotqU32H0Eh0kxmHQj2caePTZ/8IHkPGMvSjsFVCNgVwQKziSTR1wkN1hi7XTgv+Hkki2fuFP/UA5nUgj7VNwf6cUxoVu90yLgDQKTnnoR6HFsllgI4adpwaO1CkYuPfT8oo0dv7UA==",
          "algorithm": {
            "oid": "1.2.840.113549.1.1.11",
            "name": "sha256"
          }
        },
        "issuer_dn": "CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1,O=DigiCert Inc,C=US",
        "issuer": {
          "common_name": "DigiCert Global G2 TLS RSA SHA256 2020 CA1",
          "country": "US",
          "state": null,
          "locality": null,
          "organization": "DigiCert Inc",
          "organizational_unit": null
        },
        "subject_dn": "CN=paypal.com,O=PayPal\\, Inc.,L=San Jose,ST=California,C=US",
        "subject": {
          "common_name": "paypal.com",
          "country": "US",
          "state": "California",
          "locality": "San Jose",
          "organization": "PayPal, Inc.",
          "organizational_unit": null
        },
        "extensions": {
          "authority_key_id": "dIWAwGbH3zfez70pN6oDHb7tzRc=",
          "basic_constraints": {
            "is_ca": false
          },
          "certificate_policies": [
            "2.23.140.1.2.2"
          ],
          "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": true,
            "key_cert_sign": false,
            "crl_sign": false
          },
          "signed_certificate_timestamps": [
            "2026-05-11T10:37:50Z",
            "2026-05-11T10:37:51Z"
          ],
          "subject_alt_name": {
            "dns_names": [
              "paypal.com",
              "braintreepayments.com",
              "buyindiaonline.com",
              "cash2india.com",
              "curv.cc",
              "curv.co",
              "fastlane.paypal.com",
              "paypal-australia.com.au",
              "paypal-business.co.uk",
              "paypal-business.com.au"
            ]
          },
          "subject_key_id": "/Dx+xtmX3RxD+D+U+VI9epDSZtI="
        },
        "check_date": "2026-07-08T05:53:27Z"
      },
      "ssl_last_change_date": "2026-07-07T10:19:24Z",
      "webdata": {
        "connection_status": "not_resolved",
        "html": null,
        "http": null
      }
    },
    {
      "punycode": "paypal-turkiye.com",
      "unicode": "paypal-turkiye.com",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "paypal-turkiye",
        "unicode": "paypal-turkiye",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": true,
        "length": 14,
        "lang": "en",
        "keywords": [
          "paypal",
          "turkiye"
        ],
        "keyword_count": 2,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "paypal-turkiye.com",
        "unicode": "paypal-turkiye.com",
        "is_idn": false,
        "name": {
          "punycode": "paypal-turkiye",
          "unicode": "paypal-turkiye",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": true,
          "length": 14,
          "lang": "en",
          "keywords": [
            "paypal",
            "turkiye"
          ],
          "keyword_count": 2
        },
        "extension": {
          "punycode": "com",
          "unicode": "com",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "com",
          "unicode": "com",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 1,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2010-09-03T16:07:28Z",
          "update_date": "2026-08-02T11:16:59Z",
          "expiry_date": "2027-09-03T16:07:28Z",
          "registrar": "markmonitor inc.",
          "registrant": {
            "name": "REDACTED FOR PRIVACY",
            "organization": "paypal inc.",
            "street": null,
            "city": null,
            "state": null,
            "postal_code": null,
            "country": "us",
            "phone": null,
            "email": "REDACTED FOR PRIVACY"
          },
          "name_servers": [
            "ns1-pchnet.paypal.com",
            "ns2-pchnet.paypal.com",
            "pdns100.ultradns.com",
            "pdns100.ultradns.net"
          ],
          "domain_status": [
            "clientdeleteprohibited",
            "clienttransferprohibited",
            "clientupdateprohibited"
          ],
          "whois_server": "whois.markmonitor.com",
          "check_date": "2026-08-10T07:27:21Z"
        },
        "whois_normalized": {
          "registrant": {
            "organization": "paypalinc",
            "phone": null,
            "email": null,
            "email_fqdn_apex": null,
            "email_domain_apex": null
          }
        },
        "whois_last_check_date": "2026-08-10T07:27:21Z",
        "whois_create_date_historical": [
          "2010-09-03T16:07:28Z"
        ],
        "whois_last_change_date": "2026-08-10T14:33:34Z",
        "whois_registrant_email_historical": [
          "select request email form at https://domains.markmonitor.com/whois/paypal-turkiye.com",
          "user@paypal.com"
        ],
        "whois_privacy_enabled": true,
        "dns": {
          "a": {
            "update_date": "2026-09-19T23:47:41Z",
            "ip_addresses": [
              "151.101.3.1",
              "151.101.67.1",
              "162.159.141.96"
            ]
          }
        },
        "dns_last_change_date": "2026-09-19T23:48:11Z",
        "ip_history": [
          "64.4.250.38",
          "64.4.250.39",
          "151.101.3.1",
          "151.101.67.1",
          "192.229.210.155",
          "162.159.141.96"
        ],
        "ssl": {
          "validity": {
            "start_date": "2026-05-11T00:00:00Z",
            "end_date": "2026-11-25T23:59:59Z"
          },
          "serial_number": "4798075584132047144148270449582636256",
          "check_date": "2026-07-08T05:53:27Z"
        },
        "ssl_last_change_date": "2026-07-06T20:22:54Z"
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-09-19T23:47:41Z",
          "ip_addresses": [
            "151.101.3.1",
            "151.101.67.1",
            "162.159.141.96"
          ]
        },
        "aaaa": {
          "update_date": "2026-09-19T23:47:41Z",
          "ip_addresses": []
        },
        "ns": {
          "update_date": "2026-09-19T23:47:41Z",
          "name_servers": [
            "ns1-pchnet.paypal.com",
            "ns2-pchnet.paypal.com",
            "pdns100.ultradns.com",
            "pdns100.ultradns.net"
          ]
        },
        "mx": {
          "update_date": "2026-09-19T23:47:41Z",
          "mail_servers": [
            "mx1.paypalcorp.com",
            "mx2.paypalcorp.com"
          ]
        },
        "soa": {
          "update_date": "2026-09-19T23:47:41Z",
          "mnames": [
            "ppdns.paypal.com"
          ],
          "rnames": [
            "hostmaster.paypal.com"
          ],
          "rname_emails": [
            "user@paypal.com"
          ]
        },
        "txt": {
          "update_date": "2026-09-19T23:47:41Z",
          "values": [
            "\"v=spf1 -all\""
          ]
        },
        "cname": {
          "update_date": "2026-09-19T23:47:41Z",
          "values": []
        },
        "others": []
      },
      "dns_last_change_date": "2026-09-19T23:48:09Z",
      "ip_history": [
        "64.4.250.38",
        "64.4.250.39",
        "151.101.3.1",
        "151.101.67.1",
        "192.229.210.155",
        "162.159.141.96"
      ],
      "ssl": {
        "tags": [
          "dla"
        ],
        "fqdns": [
          "braintreepayments.com",
          "buyindiaonline.com",
          "cash2india.com",
          "curv.cc",
          "curv.co",
          "fastlane.paypal.com",
          "paypal-australia.com.au",
          "paypal-business.co.uk",
          "paypal-business.com.au",
          "paypal-businesscenter.com"
        ],
        "version": 3,
        "serial_number": "4798075584132047144148270449582636256",
        "fingerprint": {
          "sha256": "6e107db3ac75cc896b0584c8c4e1361ef49d57e5ed8d898473067b8c4360aa50",
          "sha1": "b72698c90ecef9b88777b289d9b062f1a10dd8fe",
          "md5": "9a8839615d59379ff702a6340f23ab59"
        },
        "validity": {
          "start_date": "2026-05-11T00:00:00Z",
          "end_date": "2026-11-25T23:59:59Z",
          "length": 17193599
        },
        "signature": {
          "is_self_signed": false,
          "is_valid": true,
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            "referrer_policy": null,
            "server": null,
            "set_cookie": "campaign=<value>; Domain=joinhoney.com; Path=/; Expires=Thu, 05 Nov 2026 00:25:24 GMT, sem-v1-v2-testGroup=<value>; Domain=joinhoney.com; Path=/; Expires=Fri, 05 Jun 2026 00:25:24 GMT, gold-count-mar22Group=<value>; Domain=joinhoney.com; Path=/; Expires=Fri, 05 Jun 2026 00:25:24 GMT, boosted_cashback_ui_july_22Group=<value>; Domain=joinhoney.com; Path=/; Expires=Fri, 05 Jun 2026 00:25:24 GMT, growth_navigation_cleanupGroup=<value>; Domain=joinhoney.com; Path=/; Expires=Fri, 05 Jun 2026 00:25:24 GMT, growth_su_homepage_apr2023Group=<value>; Domain=joinhoney.com; Path=/; Expires=Fri, 05 Jun 2026 00:25:24 GMT, growth_welcome_offers_rewards_2023_Q2_expGroup=<value>; Domain=joinhoney.com; Path=/; Expires=Fri, 05 Jun 2026 00:25:24 GMT, growth_shopping_xsell_incentive_endpointGroup=<value>; Domain=joinhoney.com; Path=/; Expires=Fri, 05 Jun 2026 00:25:24 GMT, reusable_signupGroup=<value>; Domain=joinhoney.com; Path=/; Expires=Fri, 05 Jun 2026 00:25:24 GMT, visitor=<value>; Max-Age=315360000; Domain=joinhoney.com; Path=/; Expires=Fri, 02 May 2036 00:25:24 GMT",
            "strict_transport_security": "max-age=15552000; includeSubDomains",
            "x_content_type_options": "nosniff",
            "x_download_options": "noopen",
            "x_frame_options": "SAMEORIGIN",
            "x_permitted_cross_domain_policies": null,
            "x_powered_by": null,
            "x_xss_protection": "1; mode=block"
          },
          "cookies": [
            {
              "name": "boosted_cashback_ui_july_22Group",
              "value": "<value>"
            },
            {
              "name": "campaign",
              "value": "<value>"
            },
            {
              "name": "gold-count-mar22Group",
              "value": "<value>"
            },
            {
              "name": "growth_navigation_cleanupGroup",
              "value": "<value>"
            },
            {
              "name": "growth_shopping_xsell_incentive_endpointGroup",
              "value": "<value>"
            },
            {
              "name": "growth_su_homepage_apr2023Group",
              "value": "<value>"
            },
            {
              "name": "growth_welcome_offers_rewards_2023_Q2_expGroup",
              "value": "<value>"
            },
            {
              "name": "reusable_signupGroup",
              "value": "<value>"
            },
            {
              "name": "sem-v1-v2-testGroup",
              "value": "<value>"
            },
            {
              "name": "visitor",
              "value": "<value>"
            }
          ]
        }
      }
    }
  ],
  "domain": "paypal.com",
  "requested_association_parameters": [
    "ssl_subject_organization",
    "whois_registrant_organization"
  ],
  "applied_association_parameters": [
    "ssl_subject_organization",
    "whois_registrant_organization"
  ]
}

Content-Type: application/json
ratelimit-limit: 10
ratelimit-remaining: 6
ratelimit-reset: 56
x-ratelimit-limit-minute: 10
x-ratelimit-remaining-minute: 6
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	`paypal.com`
`association`query	`whois_registrant_organization,ssl_subject_organization`
`strict`query	`true`
`page_size`query	`25`

Reference updated September 26, 2026

Request

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