# Issued by Let's Encrypt Matches records whose ssl.issuer.organization equals Let's Encrypt. Source: https://docs.deepinfo.com/reference/discovery/domain-search/examples/ssl-issuer-organization/ Last updated: 2026-09-26 --- `POST https://api.deepinfo.com/v1/discovery/domain-search?page_size=25` Example 19 of 29 in **Filters › SSL** · [Domain Search Examples](/reference/discovery/domain-search/examples/) · endpoint: [Domain Search](/reference/discovery/domain-search/) Tags: `field` `ssl.issuer.organization` · `operator` `eq` Matches records whose `ssl.issuer.organization` equals `Let's Encrypt`. In the response, look at `results[].ssl.issuer.organization`. ## Request | Parameter | In | Value | |---|---|---| | `page_size` | query | `25` | | `filters.must[0].name` | body | `ssl.issuer.organization` | | `filters.must[0].type` | body | `eq` | | `filters.must[0].value` | body | `Let's Encrypt` | ```bash curl -X POST 'https://api.deepinfo.com/v1/discovery/domain-search?page_size=25' \ -H 'apikey: YOUR_API_KEY' \ -H 'Accept: application/json' \ -H 'Content-Type: application/json' \ -d '{ "filters": { "must": [ { "name": "ssl.issuer.organization", "type": "eq", "value": "Let'\''s Encrypt" } ] } }' ``` ## 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: 1000` · `ratelimit-remaining: 998` · `ratelimit-reset: 1` · `x-ratelimit-limit-hour: 100000` · `x-ratelimit-limit-minute: 10000` · `x-ratelimit-limit-second: 1000` · `x-ratelimit-remaining-hour: 99901` · 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"whois_last_check_date": "2026-09-08T04:26:23Z", "whois_create_date_historical": [ "2019-10-05T15:27:36Z" ], "whois_last_change_date": "2026-09-08T04:30:11Z", "whois_registrant_email_historical": [ "user@identity-protect.org", "user@proxy.dreamhost.com", "user@rossbrunner.com.whoisprivacyservice.org", "user@identity-protect.org", "user@identity-protect.org", "user@rossbrunner.com.whoisprivacyservice.org", "user@identity-protect.org", "user@identity-protect.org", "user@rossbrunner.com.whoisproxy.org" ], "whois_privacy_enabled": false, "dns": { "a": { "update_date": "2026-09-22T02:49:13Z", "ip_addresses": [] } }, "dns_last_change_date": "2023-07-18T19:09:43Z", "ip_history": [ "64.111.101.250" ], "ssl": { "validity": { "start_date": "2021-10-30T09:43:16Z", "end_date": "2022-01-28T09:43:15Z" }, "serial_number": "399060391648253288820186808836446670327922", "check_date": "2021-11-26T10:40:32Z" }, "ssl_last_change_date": "2022-12-22T16:48:27Z" }, "type": 1, "subdomain_level_count": 0, "dns": { "a": { "update_date": "2026-09-22T02:49:13Z", "ip_addresses": [] }, "aaaa": { "update_date": "2026-09-22T02:49:13Z", "ip_addresses": [] }, "ns": { "update_date": "2026-09-22T02:49:13Z", "name_servers": [ "ns-14.awsdns-01.com", "ns-777.awsdns-33.net", "ns-1373.awsdns-43.org", "ns-1609.awsdns-09.co.uk" ] }, "mx": { "update_date": "2026-09-22T02:49:13Z", "mail_servers": [] }, "soa": { "update_date": "2026-09-22T02:49:13Z", "mnames": [ "ns-1609.awsdns-09.co.uk" ], "rnames": [ "awsdns-hostmaster.amazon.com" ], "rname_emails": [ "user@amazon.com" ] }, "txt": { "update_date": "2026-09-22T02:49:13Z", "values": [] }, "cname": { "update_date": "2026-09-22T02:49:13Z", "values": [] }, "others": [ { "update_date": "2023-04-11T13:05:49Z", "values": [ "\"RFC8482\" \"\"" ], "type": "HINFO" } ] }, "dns_last_change_date": "2023-07-18T19:09:42Z", "ip_history": [ "64.111.101.250" ], "ssl": { "tags": [], "fqdns": [ "rossbrunner.com", "www.rossbrunner.com" ], "version": 3, "serial_number": "399060391648253288820186808836446670327922", "fingerprint": { "sha256": "01d97867d0e3b059e7f3df559c9ef4855c903cd874644529eaf58e856a6745cd", "sha1": "668d1f950f7e19a2f7aa1bb13a8229d9ae9b4bac", "md5": "1dd67e7fff20eaf9a674eff9e8a60d36" }, "validity": { "start_date": "2021-10-30T09:43:16Z", "end_date": "2022-01-28T09:43:15Z", "length": 7775999 }, "signature": { "is_self_signed": false, "is_valid": true, "value": "n0qWIvOQ2U1edTUwySI2cRCf5jqHAicgqmXy+G+jzmwj/lTeXZ0YSSTm3AZUIdZP2CLZvkomFVumxanYwZiFSpzYgZnw5nNyRgqA1CmrjJeYzS7HUQnuR0Akph6kYCTVrs3un+RGHOiw5IxK3PmEu8bR2jkVe+0lCoVWKax2lLxJAl4J4i9+qOW7jY71v1NJAV4AWlEaMtBTySDxByDyISQXro0dJLzP5wJ3sEGXEKmDIDpJ0k9bFASfREyMEhZD6WcdzL7l0TeWKxpmx1fIgmkpang06mo9igKhotE9ISwthbAhSD+y//2Qj9MO0a/acdyNNu/NXkBrAW/UlxHKaw==", "algorithm": { "oid": "1.2.840.113549.1.1.11", "name": "sha256" } }, "issuer_dn": "CN=R3,O=Let's Encrypt,C=US", "issuer": { "common_name": "R3", "country": "US", "state": null, "locality": null, "organization": "Let's Encrypt", "organizational_unit": null }, "subject_dn": "CN=www.rossbrunner.com", "subject": { "common_name": "www.rossbrunner.com", "country": null, "state": null, "locality": null, "organization": null, "organizational_unit": null }, "extensions": { "authority_key_id": "FC6zF7dYVsuuUAlA5h+vnYsUwsY=", "basic_constraints": { "is_ca": false }, "certificate_policies": [ "2.23.140.1.2.1", "1.3.6.1.4.1.44947.1.1.1" ], "extended_key_usage": { "client_auth": true, "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": [ "2021-10-30T10:43:16Z" ], "subject_alt_name": { "dns_names": [ "rossbrunner.com", "www.rossbrunner.com" ] }, "subject_key_id": "APHi9eGDjQbayRYNDpFthnTiKAA=" }, "check_date": "2021-11-26T10:40:32Z" }, "ssl_last_change_date": "2022-12-22T16:48:27Z", "webdata": { "connection_status": "success", "html": { "source_code_hash": "247ce676f78c9b7005fb7bd1c8154df5b69c7009fcf5ec258025a903f71828e2" }, "http": { "status_code_first": 301, "status_code_last": 200, "redirection_history": [ { "url": "http://rossbrunner.com/", "status_code": 301 }, { "url": "https://rossbrunner.com/", "status_code": 302 }, { "url": "https://www.youtube.com/watch?v=grqElbNezys&feature=emb_title", "status_code": 302 }, { "url": "https://www.youtube.com/supported_browsers?next_url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DgrqElbNezys&feature=emb_title", "status_code": 200 } ], "external_redirection": true, "final_url": "https://www.youtube.com/supported_browsers?next_url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DgrqElbNezys&feature=emb_title", "final_fqdn": "www.youtube.com", "final_domain": "youtube.com", "headers": { "others": [ { "name": "pragma", "value": "no-cache" }, { "name": "expires", "value": "Mon, 01 Jan 1990 00:00:00 GMT" }, { "name": "date", "value": "Sat, 18 Jun 2022 19:46:02 GMT" }, { "name": "permissions_policy", "value": "ch-ua-arch=*, ch-ua-bitness=*, ch-ua-full-version=*, ch-ua-full-version-list=*, ch-ua-model=*, ch-ua-platform=*, ch-ua-platform-version=*" }, { "name": "accept_ch", "value": "Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version" }, { "name": "vary", "value": "Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version" }, { "name": "report_to", "value": "{\"group\":\"youtube_main\",\"max_age\":2592000,\"endpoints\":[{\"url\":\"https://csp.withgoogle.com/csp/report-to/youtube_main\"}]}" }, { "name": "cross_origin_opener_policy_report_only", "value": "same-origin; report-to=\"youtube_main\"" }, { "name": "p3p", "value": "CP=\"This is not a P3P policy! See http://support.google.com/accounts/answer/151657?hl=en for more info.\"" }, { "name": "alt_svc", "value": "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000,h3-Q050=\":443\"; ma=2592000,h3-Q046=\":443\"; ma=2592000,h3-Q043=\":443\"; ma=2592000,quic=\":443\"; ma=2592000; v=\"46,43\"" } ], "access_control_allow_headers": null, "access_control_allow_methods": null, "access_control_allow_origin": null, "cache_control": "no-cache, no-store, max-age=0, must-revalidate", "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": null, "permission_policy": null, "referrer_policy": null, "server": "ESF", "set_cookie": "hideBrowserUpgradeBox=; Domain=.youtube.com; Expires=Sat, 02-Jul-2022 19:46:02 GMT; Path=/; Secure; HttpOnly, YSC=; Domain=.youtube.com; Path=/; Secure; HttpOnly, VISITOR_INFO1_LIVE=; Domain=.youtube.com; Expires=Thu, 15-Dec-2022 19:46:02 GMT; Path=/; Secure; HttpOnly", "strict_transport_security": "max-age=31536000", "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": "0" }, "cookies": [ { "name": "VISITOR_INFO1_LIVE", "value": "" }, { "name": "YSC", "value": "" }, { "name": "hideBrowserUpgradeBox", "value": "" } ] } } } ] } ``` ## Related Examples - [Latest Certificate Changes First](/reference/discovery/domain-search/examples/latest-certificate-changes-first/) - [Wildcard Certificates From Let's Encrypt](/reference/discovery/domain-search/examples/wildcard-certificates-from-lets-encrypt/) - [Issuer Locality](/reference/discovery/domain-search/examples/ssl-issuer-locality/) - [Issuer State](/reference/discovery/domain-search/examples/ssl-issuer-state/) - [Issuer Country](/reference/discovery/domain-search/examples/ssl-issuer-country/) - [Subject Common Name](/reference/discovery/domain-search/examples/ssl-subject-common-name/)