# Every Extension Under .uk Matches records whose domain.extension_root equals uk. Source: https://docs.deepinfo.com/reference/discovery/domain-search/examples/domain-extension-root/ Last updated: 2026-09-26 --- `POST https://api.deepinfo.com/v1/discovery/domain-search?page_size=25` Example 18 of 20 in **Filters › Name & Extension** · [Domain Search Examples](/reference/discovery/domain-search/examples/) · endpoint: [Domain Search](/reference/discovery/domain-search/) Tags: `field` `domain.extension_root` · `operator` `eq` Matches records whose `domain.extension_root` equals `uk`. The extension root is the top-level part: `uk` for both `uk` and `co.uk`. In the response, look at `results[].domain.extension_root.punycode`. ## Request | Parameter | In | Value | |---|---|---| | `page_size` | query | `25` | | `filters.must[0].name` | body | `domain.extension_root` | | `filters.must[0].type` | body | `eq` | | `filters.must[0].value` | body | `uk` | ```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": "domain.extension_root", "type": "eq", "value": "uk" } ] } }' ``` ## Response ### 200 · OK > Shortened for this page: results: 3 of 25 shown `Content-Type: application/json` · `ratelimit-limit: 1000` · `ratelimit-remaining: 999` · `ratelimit-reset: 1` · `x-ratelimit-limit-hour: 100000` · `x-ratelimit-limit-minute: 10000` · `x-ratelimit-limit-second: 1000` · `x-ratelimit-remaining-hour: 99982` · `x-ratelimit-remaining-minute: 9982` · `x-ratelimit-remaining-second: 999` · `deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a` ```json { "page": 1, "page_size": 25, "result_count": 35794179, "results": [ { "punycode": "dqclfsmj.balcombecarehomes.co.uk", "unicode": "dqclfsmj.balcombecarehomes.co.uk", "is_idn": false, "subdomain": { "punycode": "dqclfsmj", "unicode": "dqclfsmj", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 8 }, "subdomain_last": { "punycode": "dqclfsmj", "unicode": "dqclfsmj", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 8 }, "subdomain_root": { "punycode": "dqclfsmj", "unicode": "dqclfsmj", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 8 }, "name": { "punycode": "dqclfsmj.balcombecarehomes", "unicode": "dqclfsmj.balcombecarehomes", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 25, "lang": "en", "keywords": [ "dqc", "lfs", "mj", "balcombe", "care", "homes" ], "keyword_count": 6, "latinized": [], "contains_confusable": false }, "domain": { "punycode": "balcombecarehomes.co.uk", "unicode": "balcombecarehomes.co.uk", "is_idn": false, "name": { "punycode": "balcombecarehomes", "unicode": "balcombecarehomes", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 17, "lang": "en", "keywords": [ "balcombe", "care", "homes" ], "keyword_count": 3 }, "extension": { "punycode": "co.uk", "unicode": "co.uk", "is_idn": false }, "extension_root": { "punycode": "uk", "unicode": "uk", "is_idn": false }, "extension_sub": { "punycode": "co", "unicode": "co", "is_idn": false }, "extension_type": 2, "reserved": null, "premium": null, "registered": true, "whois": { "create_date": "2023-05-25T09:39:04Z", "update_date": "2025-05-21T07:29:04Z", "expiry_date": "2026-05-25T09:39:04Z", "registrar": "tool domains eood t/a edoms.com", "registrant": { "name": null, "organization": null, "street": null, "city": null, "state": null, "postal_code": null, "country": null, "phone": null, "email": "REDACTED FOR PRIVACY" }, "name_servers": [ "ns1.parkingcrew.net", "ns2.parkingcrew.net" ], "domain_status": [ "active" ], "whois_server": null, "check_date": "2026-06-12T19:40:09Z" }, "whois_normalized": { "registrant": { "organization": null, "phone": null, "email": "REDACTED FOR PRIVACY", "email_fqdn_apex": "REDACTED FOR PRIVACY", "email_domain_apex": "REDACTED FOR PRIVACY" } }, "whois_last_check_date": "2026-06-12T19:40:09Z", "whois_create_date_historical": null, "whois_last_change_date": "2026-01-20T09:33:55Z", "whois_registrant_email_historical": null, "whois_privacy_enabled": false, "dns": { "a": { "update_date": "2026-09-01T16:30:19Z", "ip_addresses": [ "104.247.81.99" ] } }, "dns_last_change_date": "2026-09-01T16:33:00Z", "ip_history": null, "ssl": null, "ssl_last_change_date": "2025-12-17T09:19:42Z" }, "type": 2, "subdomain_level_count": 1, "dns": { "a": { "update_date": "2026-09-06T23:37:50Z", "ip_addresses": [ "104.247.81.99" ] }, "aaaa": { "update_date": "2026-09-06T23:37:50Z", "ip_addresses": [] }, "ns": { "update_date": "2026-09-06T23:37:50Z", "name_servers": [ "ns1.parkingcrew.net", "ns2.parkingcrew.net" ] }, "mx": { "update_date": "2026-09-06T23:37:50Z", "mail_servers": [ "mail.h-email.net" ] }, "soa": { "update_date": "2026-09-06T23:37:50Z", "mnames": [ "ns1.parkingcrew.net" ], "rnames": [ "hostmaster.dqclfsmj.balcombecarehomes.co.uk" ], "rname_emails": [ "user@dqclfsmj.balcombecarehomes.co.uk" ] }, "txt": { "update_date": "2026-09-06T23:37:50Z", "values": [ "\"v=spf1 ip6:fd1b:212c:a5f9::/48 -all\"" ] }, "cname": { "update_date": "2026-09-06T23:37:50Z", "values": [] }, "others": [] }, "dns_last_change_date": "2026-09-07T16:07:30Z", "ip_history": [ "104.247.81.99" ], "ssl": null, "ssl_last_change_date": null, "webdata": { "connection_status": "success", "html": { "source_code_hash": "32f2fa940d4b4fe19aca1e53a24e5aac29c57b7c5ee78588325b87f1b649c864" }, "http": { "status_code_first": 403, "status_code_last": 403, "redirection_history": [ { "url": "http://dqclfsmj.balcombecarehomes.co.uk/", "status_code": 403 } ], "external_redirection": null, "final_url": "http://dqclfsmj.balcombecarehomes.co.uk/", "final_fqdn": "dqclfsmj.balcombecarehomes.co.uk", "final_domain": "balcombecarehomes.co.uk", "headers": { "others": [ { "name": "date", "value": "Tue, 18 Nov 2025 15:38:08 GMT" }, { "name": "content_length", "value": "146" }, { "name": "connection", "value": "keep-alive" } ], "access_control_allow_headers": null, "access_control_allow_methods": null, "access_control_allow_origin": null, "cache_control": null, "clear_site_data": null, "content_encoding": null, "content_security_policy": null, "content_type": "text/html", "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": "nginx", "set_cookie": null, "strict_transport_security": null, "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": [] } } }, { "punycode": "www.theelsewhere.co.uk", "unicode": "www.theelsewhere.co.uk", "is_idn": false, "subdomain": { "punycode": "www", "unicode": "www", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 3 }, "subdomain_last": { "punycode": "www", "unicode": "www", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 3 }, "subdomain_root": { "punycode": "www", "unicode": "www", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 3 }, "name": { "punycode": "www.theelsewhere", "unicode": "www.theelsewhere", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 15, "lang": "en", "keywords": [ "www", "the", "elsewhere" ], "keyword_count": 3, "latinized": [], "contains_confusable": false }, "domain": { "punycode": "theelsewhere.co.uk", "unicode": "theelsewhere.co.uk", "is_idn": false, "name": { "punycode": "theelsewhere", "unicode": "theelsewhere", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 12, "lang": "en", "keywords": [ "the", "elsewhere" ], "keyword_count": 2 }, "extension": { "punycode": "co.uk", "unicode": "co.uk", "is_idn": false }, "extension_root": { "punycode": "uk", "unicode": "uk", "is_idn": false }, "extension_sub": { "punycode": "co", "unicode": "co", "is_idn": false }, "extension_type": 2, "reserved": null, "premium": null, "registered": true, "whois": { "create_date": "2025-05-15T13:00:09Z", "update_date": "2025-11-20T17:42:41Z", "expiry_date": "2028-05-15T13:00:09Z", "registrar": "squarespace domains llc t/a squarespace domains", "registrant": { "name": null, "organization": null, "street": null, "city": null, "state": null, "postal_code": null, "country": null, "phone": null, "email": "REDACTED FOR PRIVACY" }, "name_servers": [ "dns1.p01.nsone.net", "dns2.p01.nsone.net", "dns3.p01.nsone.net", "dns4.p01.nsone.net" ], "domain_status": [ "clientdeleteprohibited", "clienttransferprohibited" ], "whois_server": null, "check_date": "2026-09-07T16:56:42Z" }, "whois_normalized": { "registrant": { "organization": null, "phone": null, "email": "REDACTED FOR PRIVACY", "email_fqdn_apex": "REDACTED FOR PRIVACY", "email_domain_apex": "REDACTED FOR PRIVACY" } }, "whois_last_check_date": "2026-09-07T16:56:42Z", "whois_create_date_historical": null, "whois_last_change_date": "2026-06-06T13:12:18Z", "whois_registrant_email_historical": null, "whois_privacy_enabled": false, "dns": { "a": { "update_date": "2026-08-24T00:37:50Z", "ip_addresses": [ "198.49.23.144", "198.49.23.145", "198.185.159.144", "198.185.159.145" ] } }, "dns_last_change_date": "2025-12-14T12:08:37Z", "ip_history": null, "ssl": null, "ssl_last_change_date": null }, "type": 2, "subdomain_level_count": 1, "dns": { "a": { "update_date": "2026-09-04T00:07:01Z", "ip_addresses": [ "198.49.23.144", "198.49.23.145", "198.185.159.144", "198.185.159.145" ] }, "aaaa": { "update_date": "2026-09-04T00:07:01Z", "ip_addresses": [] }, "ns": { "update_date": "2026-09-04T00:07:01Z", "name_servers": [] }, "mx": { "update_date": "2026-09-04T00:07:01Z", "mail_servers": [] }, "soa": { "update_date": "2026-09-04T00:07:01Z", "mnames": [], "rnames": [], "rname_emails": [] }, "txt": { "update_date": "2026-09-04T00:07:01Z", "values": [] }, "cname": { "update_date": "2026-09-04T00:07:01Z", "values": [ "ext-sq.squarespace.com." ] }, "others": [] }, "dns_last_change_date": "2026-09-04T11:30:45Z", "ip_history": [ "91.195.240.19", "198.185.159.144", "198.185.159.145", "198.49.23.144", "198.49.23.145" ], "ssl": null, "ssl_last_change_date": "2025-12-13T22:49:47Z", "webdata": { "connection_status": "success", "html": { "source_code_hash": "719d083e3d9daa9dc26c378ec56bdb83a103b53b573d508fb602971cb4bc01ab" }, "http": { "status_code_first": 301, "status_code_last": 200, "redirection_history": [ { "url": "http://www.theelsewhere.co.uk/", "status_code": 301 }, { "url": "https://theelsewhere.co.uk/", "status_code": 200 } ], "external_redirection": false, "final_url": "https://theelsewhere.co.uk/", "final_fqdn": "theelsewhere.co.uk", "final_domain": "theelsewhere.co.uk", "headers": { "others": [ { "name": "accept_ranges", "value": "bytes" }, { "name": "age", "value": "39104" }, { "name": "content_length", "value": "31998" }, { "name": "date", "value": "Fri, 22 May 2026 23:28:56 GMT" }, { "name": "etag", "value": "W/\"0ed1b0b530e1e185455fe4dad9ab0cb6--gzip\"" }, { "name": "expires", "value": "Thu, 01 Jan 1970 00:00:00 GMT" }, { "name": "vary", "value": "Accept-Encoding" }, { "name": "x_contextid", "value": "wPmxcU0r/TTI8SBFQ" } ], "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": null, "permission_policy": null, "referrer_policy": null, "server": "Squarespace", "set_cookie": "crumb=;Secure;Path=/", "strict_transport_security": "max-age=15552000", "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": null }, "cookies": [ { "name": "crumb", "value": "" } ] } } }, { "punycode": "www.ornategardenpods.co.uk", "unicode": "www.ornategardenpods.co.uk", "is_idn": false, "subdomain": { "punycode": "www", "unicode": "www", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 3 }, "subdomain_last": { "punycode": "www", "unicode": "www", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 3 }, "subdomain_root": { "punycode": "www", "unicode": "www", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 3 }, "name": { "punycode": "www.ornategardenpods", "unicode": "www.ornategardenpods", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 19, "lang": "en", "keywords": [ "www", "ornate", "garden", "pods" ], "keyword_count": 4, "latinized": [], "contains_confusable": false }, "domain": { "punycode": "ornategardenpods.co.uk", "unicode": "ornategardenpods.co.uk", "is_idn": false, "name": { "punycode": "ornategardenpods", "unicode": "ornategardenpods", "is_idn": false, "contains_letter": true, "contains_number": false, "contains_hyphen": false, "length": 16, "lang": "en", "keywords": [ "ornate", "garden", "pods" ], "keyword_count": 3 }, "extension": { "punycode": "co.uk", "unicode": "co.uk", "is_idn": false }, "extension_root": { "punycode": "uk", "unicode": "uk", "is_idn": false }, "extension_sub": { "punycode": "co", "unicode": "co", "is_idn": false }, "extension_type": 2, "reserved": null, "premium": null, "registered": null, "whois": null, "whois_normalized": null, "whois_last_check_date": null, "whois_create_date_historical": null, "whois_last_change_date": null, "whois_registrant_email_historical": null, "whois_privacy_enabled": null, "dns": { "a": { "update_date": "2026-09-03T04:38:12Z", "ip_addresses": [ "3.33.130.190", "15.197.148.33" ] } }, "dns_last_change_date": "2026-09-03T04:38:25Z", "ip_history": null, "ssl": null, "ssl_last_change_date": null }, "type": 2, "subdomain_level_count": 1, "dns": { "a": { "update_date": "2026-09-04T06:22:28Z", "ip_addresses": [ "3.33.130.190", "15.197.148.33" ] }, "aaaa": { "update_date": "2026-09-04T06:22:28Z", "ip_addresses": [] }, "ns": { "update_date": "2026-09-04T06:22:28Z", "name_servers": [ "ns25.domaincontrol.com", "ns26.domaincontrol.com" ] }, "mx": { "update_date": "2026-09-04T06:22:28Z", "mail_servers": [] }, "soa": { "update_date": "2026-09-04T06:22:28Z", "mnames": [ "ns25.domaincontrol.com" ], "rnames": [ "dns.jomax.net" ], "rname_emails": [ "user@jomax.net" ] }, "txt": { "update_date": "2026-09-04T06:22:28Z", "values": [] }, "cname": { "update_date": "2026-09-04T06:22:28Z", "values": [ "ornategardenpods.co.uk." ] }, "others": [] }, "dns_last_change_date": "2026-09-04T06:22:33Z", "ip_history": [ "15.197.148.33", "3.33.130.190" ], "ssl": null, "ssl_last_change_date": null, "webdata": { "connection_status": "success", "html": { "source_code_hash": "0d3e98ca727fc1201b436170af5a63f23348aaf146a3ac6234f6c4da283e8b34" }, "http": { "status_code_first": 403, "status_code_last": 403, "redirection_history": [ { "url": "http://www.ornategardenpods.co.uk/", "status_code": 403 } ], "external_redirection": null, "final_url": "http://www.ornategardenpods.co.uk/", "final_fqdn": "www.ornategardenpods.co.uk", "final_domain": "ornategardenpods.co.uk", "headers": { "others": [ { "name": "content_length", "value": "93" } ], "access_control_allow_headers": null, "access_control_allow_methods": null, "access_control_allow_origin": null, "cache_control": "no-cache", "clear_site_data": null, "content_encoding": null, "content_security_policy": null, "content_type": "text/html", "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": null, "set_cookie": null, "strict_transport_security": null, "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": [] } } } ] } ``` ## Related Examples - [Internationalized Extensions Only](/reference/discovery/domain-search/examples/domain-extension-is-idn/) - [Second-Level Extensions Like co.uk](/reference/discovery/domain-search/examples/domain-extension-sub/) - [Domains Under One Extension](/reference/discovery/domain-search/examples/domain-extension/) - [Country-Code Extensions Only](/reference/discovery/domain-search/examples/domain-extension-type/) - [Names Built From Two Keywords](/reference/discovery/domain-search/examples/domain-name-keywords/) - [Domain Names in German](/reference/discovery/domain-search/examples/domain-name-language/)