# Same Mail Servers (DNS MX) The domains that use the same mail servers as cloudflare.com (Cloudflare Email Security): 1,376. Source: https://docs.deepinfo.com/reference/discovery/associated-domain-finder/examples/dns-mx/ Last updated: 2026-09-26 --- `GET https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=cloudflare.com&association=dns_mx&page_size=25` The domains that use the same mail servers as cloudflare.com (Cloudflare Email Security): 1,376. Example 10 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` `dns_mx` · `value` `cloudflare.com` `association=dns_mx` compares the mail servers of the DNS MX record. The API found 1,376 domains on `mxa` and `mxb.global.inbound.cf-emailsecurity.net`, the inbound servers of Cloudflare’s e-mail security service. Here the association finds a shared service, not a shared owner. In the response, look at `results[].dns.mx.mail_servers`. ## Request | Parameter | In | Value | |---|---|---| | `domain` | query | `cloudflare.com` | | `association` | query | `dns_mx` | | `page_size` | query | `25` | ```bash curl 'https://api.deepinfo.com/v1/discovery/associated-domain-finder?domain=cloudflare.com&association=dns_mx&page_size=25' \ -H 'apikey: YOUR_API_KEY' \ -H 'Accept: application/json' ``` ## Response ### 200 · OK > Shortened for this page: results: 3 of 25 shown; results[].webdata.http.headers.others: first 10 items `Content-Type: application/json` · `ratelimit-limit: 10` · `ratelimit-remaining: 9` · `ratelimit-reset: 59` · `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": 1376, "results": [ { "punycode": "r100.ai", "unicode": "r100.ai", "is_idn": false, "subdomain": null, "subdomain_last": null, "subdomain_root": null, "name": { 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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": [ "2026-07-03T20:02:46Z", "2026-07-03T20:02:45Z" ], "subject_alt_name": { "dns_names": [ "dictionarymedia.com" ] }, "subject_key_id": "+gJEFjVuE4tU5wwNv2MhLavv9Co=" }, "check_date": "2026-08-01T17:59:40Z" }, "ssl_last_change_date": "2026-08-01T18:02:49Z", "webdata": { "connection_status": "success", "html": { "source_code_hash": "e548af8aad0163d1e0a2bff03aa1fa1323bf7de9a827140c226a7b1f8a2eb97a" }, "http": { "status_code_first": 301, "status_code_last": 200, "redirection_history": [ { "url": "http://dictionarymedia.com/", "status_code": 301 }, { "url": "https://dictionarymedia.com/", "status_code": 301 }, { "url": "https://www.dictionarymedia.com/", "status_code": 200 } ], "external_redirection": false, "final_url": "https://www.dictionarymedia.com/", "final_fqdn": "www.dictionarymedia.com", "final_domain": "dictionarymedia.com", "headers": { "others": [ { "name": "date", "value": "Fri, 10 Jul 2026 12:36:26 GMT" }, { "name": "transfer_encoding", "value": "chunked" }, { "name": "connection", "value": "keep-alive" }, { "name": "cf_ray", "value": "a18f9d339c0a23d3-ORD" }, { "name": "cf_cache_status", "value": "HIT" }, { "name": "age", "value": "1208859" }, { "name": "vary", "value": "accept-encoding" }, { "name": "surrogate_control", "value": "max-age=2147483647" }, { "name": "surrogate_key", "value": "www.dictionarymedia.com 6716b6d97e124cd50ed7b8b9 pageId:6716b6d97e124cd50ed7b8c2" }, { "name": "x_lambda_id", "value": "c07e33c9-9e35-4969-bdea-4fab2628c439" } ], "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": null, "content_type": "text/html; charset=utf-8", "cross_origin_embedder_policy": null, "cross_origin_opener_policy": null, "cross_origin_resource_policy": null, "expect_ct": null, "feature_policy": null, "last_modified": "Sat, 27 Jun 2026 13:11:23 GMT", "permission_policy": null, "referrer_policy": null, "server": "cloudflare", "set_cookie": null, "strict_transport_security": "max-age=31536000", "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": [] } } } ], "domain": "cloudflare.com", "requested_association_parameters": [ "dns_mx" ], "applied_association_parameters": [ "dns_mx" ] } ``` ## Related Examples - [Same Name Servers in DNS](/reference/discovery/associated-domain-finder/examples/dns-ns/) - [Same Organization in the Certificate](/reference/discovery/associated-domain-finder/examples/ssl-subject-organization/) - [Same IP Address (DNS A)](/reference/discovery/associated-domain-finder/examples/dns-a/) - [Same Name Servers in WHOIS](/reference/discovery/associated-domain-finder/examples/whois-ns/) - [Same Normalized Registrant Phone](/reference/discovery/associated-domain-finder/examples/whois-registrant-phone-normalized/) - [Same Registrant Phone](/reference/discovery/associated-domain-finder/examples/whois-registrant-phone/)