# Same Registrant Phone The domains whose registrant phone number is written exactly as that of cloudflare.co.at (+16503198930): 2, cloudflare.co.at itself and cloudflare.at. Source: https://docs.deepinfo.com/reference/discovery/associated-domain-finder/examples/whois-registrant-phone/ Last updated: 2026-09-26 --- `GET https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=cloudflare.co.at&association=whois_registrant_phone&page_size=25` The domains whose registrant phone number is written exactly as that of cloudflare.co.at (+16503198930): 2, cloudflare.co.at itself and cloudflare.at. Example 5 of 11 in **One Association Type** · [Associated Domain Finder Examples](/reference/discovery/associated-domain-finder/examples/) · endpoint: [Associated Domain Finder](/reference/discovery/associated-domain-finder/) Tags: `param` `association` · `param` `domain` · `value` `whois_registrant_phone` · `value` `cloudflare.co.at` `association=whois_registrant_phone` compares the registrant phone number exactly as written in WHOIS. `cloudflare.co.at` gives Cloudflare’s phone number as `+16503198930`. Two domains write it the same way: `cloudflare.co.at` itself and `cloudflare.at`, both registered to Cloudflare. In the response, look at `result_count` and `results[].domain.whois.registrant.phone`. ## Request | Parameter | In | Value | |---|---|---| | `domain` | query | `cloudflare.co.at` | | `association` | query | `whois_registrant_phone` | | `page_size` | query | `25` | ```bash curl 'https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=cloudflare.co.at&association=whois_registrant_phone&page_size=25' \ -H 'apikey: YOUR_API_KEY' \ -H 'Accept: application/json' ``` ## Response ### 200 · OK > Shortened for this page: results[].domain.ip_history: first 10 items; results[].ip_history: first 10 items; results[].webdata.http.headers.others: first 10 items `Content-Type: application/json` · `ratelimit-limit: 10` · `ratelimit-remaining: 9` · `ratelimit-reset: 49` · `x-ratelimit-limit-minute: 10` · `x-ratelimit-remaining-minute: 9` · `deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a` ```json { "page": 1, "page_size": 25, "result_count": 2, "results": [ { "punycode": "cloudflare.co.at", "unicode": "cloudflare.co.at", "is_idn": false, "subdomain": null, "subdomain_last": null, "subdomain_root": null, "name": { "punycode": "cloudflare", "unicode": "cloudflare", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 10, "lang": "en", "keywords": [ "cloudflare" ], "keyword_count": 1, "latinized": [], "contains_confusable": false }, "domain": { "punycode": "cloudflare.co.at", "unicode": "cloudflare.co.at", "is_idn": false, "name": { "punycode": "cloudflare", "unicode": "cloudflare", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 10, "lang": "en", "keywords": [ "cloudflare" ], "keyword_count": 1 }, "extension": { "punycode": "co.at", "unicode": "co.at", "is_idn": false }, "extension_root": { "punycode": "at", "unicode": "at", "is_idn": false }, "extension_sub": { "punycode": "co", "unicode": "co", "is_idn": false }, "extension_type": 2, "reserved": null, "premium": null, "registered": true, "whois": { "create_date": null, "update_date": "2021-01-03T20:07:24Z", "expiry_date": null, "registrar": "101domain grs ltd.", "registrant": { "name": "cloudflare inc", "organization": "cloudflare", "street": "665 3rd street", "city": "san francisco", "state": null, "postal_code": "94107", "country": "united states of america (the)", "phone": "+16503198930", "email": "user@cloudflare.com" }, "name_servers": [ "thomas.ns.cloudflare.com", "vita.ns.cloudflare.com" ], "domain_status": [], "whois_server": null, "check_date": "2026-06-17T22:35:32Z" }, "whois_normalized": { "registrant": { "organization": "cloudflare", "phone": "16503198930", "email": "user@cloudflare.com", "email_fqdn_apex": "cloudflare.com", "email_domain_apex": "cloudflare.com" } }, "whois_last_check_date": "2026-06-17T22:35:32Z", "whois_create_date_historical": [], "whois_last_change_date": null, "whois_registrant_email_historical": [ "user@cloudflare.com" ], "whois_privacy_enabled": false, "dns": { "a": { "update_date": "2026-09-07T00:36:05Z", "ip_addresses": [ "104.21.57.218", "172.67.167.13" ] } }, "dns_last_change_date": "2026-09-07T00:37:08Z", "ip_history": [ "104.21.57.218", "172.67.167.13", "172.64.80.1", "188.114.96.2", "188.114.97.2", "104.21.112.1", "104.21.16.1", "104.21.32.1", "104.21.48.1", "104.21.64.1" ], "ssl": { "validity": { "start_date": "2026-07-02T16:45:15Z", "end_date": "2026-09-30T17:43:38Z" }, "serial_number": "340171976894111899412400308250546506914", "check_date": "2026-08-01T00:58:16Z" }, "ssl_last_change_date": "2026-08-01T00:59:14Z" }, "type": 1, "subdomain_level_count": 0, "dns": { "a": { "update_date": "2026-09-07T00:36:05Z", "ip_addresses": [ "104.21.57.218", "172.67.167.13" ] }, "aaaa": { "update_date": "2026-09-07T00:36:05Z", "ip_addresses": [ "2606:4700:3031::6815:39da", "2606:4700:3035::ac43:a70d" ] }, "ns": { "update_date": "2026-09-07T00:36:05Z", "name_servers": [ "thomas.ns.cloudflare.com", 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"content_commitment": false, "key_agreement": false, "data_encipherment": false, "key_encipherment": false, "key_cert_sign": false, "crl_sign": false }, "signed_certificate_timestamps": [ "2026-07-02T17:45:16Z" ], "subject_alt_name": { "dns_names": [ "cloudflare.co.at", "*.cloudflare.co.at" ] }, "subject_key_id": "ehC23DrIj2e+74TlkL/6l9r89EU=" }, "check_date": "2026-08-01T00:58:16Z" }, "ssl_last_change_date": "2026-08-01T00:59:13Z", "webdata": { "connection_status": "success", "html": { "source_code_hash": "5ed8b057fba5cebda7c6db7e52e25ebc8773071336caca055afd5d0244651860" }, "http": { "status_code_first": 301, "status_code_last": 200, "redirection_history": [ { "url": "http://cloudflare.co.at/", "status_code": 301 }, { "url": "https://www.cloudflare.com", "status_code": 200 } ], "external_redirection": true, "final_url": "https://www.cloudflare.com", "final_fqdn": "www.cloudflare.com", "final_domain": "cloudflare.com", "headers": { "others": [ { "name": "date", "value": "Sun, 07 Jun 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} } }, { "punycode": "cloudflare.at", "unicode": "cloudflare.at", "is_idn": false, "subdomain": null, "subdomain_last": null, "subdomain_root": null, "name": { "punycode": "cloudflare", "unicode": "cloudflare", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 10, "lang": "en", "keywords": [ "cloudflare" ], "keyword_count": 1, "latinized": [], "contains_confusable": false }, "domain": { "punycode": "cloudflare.at", "unicode": "cloudflare.at", "is_idn": false, "name": { "punycode": "cloudflare", "unicode": "cloudflare", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 10, "lang": "en", "keywords": [ "cloudflare" ], "keyword_count": 1 }, "extension": { "punycode": "at", "unicode": "at", "is_idn": false }, "extension_root": { "punycode": "at", "unicode": "at", "is_idn": false }, "extension_sub": null, "extension_type": 2, "reserved": null, "premium": null, "registered": true, 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