# Same Registrant E-mail The domains whose registrant e-mail equals that of cloudflare.co.at: 2, cloudflare.co.at itself and cloudflare.co.il. Source: https://docs.deepinfo.com/reference/discovery/associated-domain-finder/examples/whois-registrant-email/ Last updated: 2026-09-26 --- `GET https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=cloudflare.co.at&association=whois_registrant_email&page_size=25` The domains whose registrant e-mail equals that of cloudflare.co.at: 2, cloudflare.co.at itself and cloudflare.co.il. Example 1 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_email` · `value` `cloudflare.co.at` `association=whois_registrant_email` compares the registrant e-mail address. Two domains share it: `cloudflare.co.at` itself and `cloudflare.co.il`. The address is a Cloudflare mailbox; on this page it reads `user@cloudflare.com`, as does every address that is not a published role mailbox. In the response, look at `results[].domain.whois.registrant.email` and `results[].domain.whois_normalized.registrant.email_domain_apex`. ## Request | Parameter | In | Value | |---|---|---| | `domain` | query | `cloudflare.co.at` | | `association` | query | `whois_registrant_email` | | `page_size` | query | `25` | ```bash curl 'https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=cloudflare.co.at&association=whois_registrant_email&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: 14` · `x-ratelimit-limit-minute: 10` · `x-ratelimit-remaining-minute: 9` · `deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a` ```json { "page": 1, "page_size": 25, 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Registrant Phone](/reference/discovery/associated-domain-finder/examples/whois-registrant-phone/) - [Same Normalized Registrant Phone](/reference/discovery/associated-domain-finder/examples/whois-registrant-phone-normalized/) - [Same Registrant Organization](/reference/discovery/associated-domain-finder/examples/whois-registrant-organization/) - [Same Normalized Registrant Organization](/reference/discovery/associated-domain-finder/examples/whois-registrant-organization-normalized/) - [Same Name Servers in WHOIS](/reference/discovery/associated-domain-finder/examples/whois-ns/)