Download list of all ZK sites

Name: Websites that use ZK
Creator: webatla
License: https://webatla.com/terms

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84 Sites detected

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ZK detection is a value inside the Technologies column. Two datasets carry it, switch between them to compare what's included.

webatla-technologies-zk-2026-10-03.jsonl.zst · 84 rows · 14 columns Daily fresh export

Domain	TLD suffix	TLD	Domain type	HTTP status	IP address	Country by IP	Social networks	Technologies last data checked	Technologies	PR value	Harmonic value	Domain creation date	Domain expiration date
vcalc.com	com	com	ICANN	HTTP 200	146.20.60.138	US	—	2026-09-21	Google Analytics GA4 G-BNE3SMGFP0, ZK, Java, Jetty 9.4.36, cdnjs, jQuery 3.4.1, Favicon, MathJax 2.7.7, Bootstrap 3.3.7, Cloudflare	0.0000000500963	13,952,688	1999-04-16	2027-04-16
tarcza.malopolska.pl	malopolska.pl	pl	ICANN	HTTP 200	54.36.172.202	FR	—	2026-09-20	ZK, HSTS, Java, Nginx, HTTP/2, Favicon, OVHcloud, reCAPTCHA	0.000000013159	11,333,571	2020-04-14	2027-04-14
versicherungskanzlei.co.at	co.at	at	ICANN	HTTP 200	144.76.58.144	DE	{"facebook":["https://facebook.com/versicherungskanzlei"]}	2026-09-21	ZK, Java, Osano, cdnjs, jQuery, Favicon, FancyBox, Bootstrap 3, jQuery UI, Cloudflare	0.0000000105821	7,725,792	—	—
vseveda.org	org	org	ICANN	HTTP 200	5.178.86.203	RU	—	2026-09-21	ZK, Java, HTTP/2, Favicon, OpenSSL 1.1.1m, Bootstrap, Open Graph, Font Awesome, Windows Server, Apache HTTP Server 2.4.52	0.00000000639039	12,699,935	2013-03-27	2027-03-27
atzgersdorf.info	info	info	ICANN	HTTP 200	144.76.58.144	DE	{"facebook":["https://facebook.com/handball4fans","https://facebook.com/profile.php?fref=ts&id=100011690325161"],"instagram":["https://instagram.com/wat.atzgersdorf"]}	2026-09-27	ZK, RSS, Java, Slick, jQuery, Favicon, FancyBox, Bootstrap 3, jQuery UI, Open Graph	0.0000000060547	12,084,153	2004-02-27	2027-02-27
…	…	…	…	…	…	…	…	…	…	…	…	…	…

Domain	TLD suffix	TLD	Domain type	HTTP status	IP address	Country by IP	Social networks	Technologies last data checked	Technologies	DNS last data checked	DNS Status	DNS records	PR value	Harmonic value	RDAP/WHOIS last data checked	RDAP/WHOIS method	Domain creation date	Domain expiration date	Domain last changed	Registrar	RDAP/WHOIS Record	Response Status RDAP/WHOIS
vcalc.com	com	com	ICANN	HTTP 200	146.20.60.138	US	—	2026-09-21	Google Analytics GA4 G-BNE3SMGFP0, ZK, Java, Jetty 9.4.36, cdnjs, jQuery 3.4.1, Favicon, MathJax 2.7.7, Bootstrap 3.3.7, Cloudflare	2026-09-22	TRUE	{"A":["146.20.60.138"],"MX":[{"host":"alt1.aspmx.l.google.com","priority":5},{"host":"alt2.aspmx.l.google.com","priority":5},{"host":"alt3.aspmx.l.google.com","priority":10},{"host":"alt4.aspmx.l.google.com","priority":10},{"host":"aspmx.l.google.com","priority":1}],"NS":["dns1.stabletransit.com","dns2.stabletransit.com"],"SOA":{"mname":"ns.rackspace.com","retry":3600,"rname":"adam.siegel.vcalc.com","expire":1814400,"serial":1787097577,"minimum":500,"refresh":21600},"TXT":["google-site-verification=gdNPxAGHhgPFCZGGHZGQ4UULF8t3dsicbcZY2yXA9uk","google-site-verification=o1-mizdoDCRoekmlr-0kbHuiERLCFL0WyZHi6CDkQbE","v=spf1 include:_spf.google.com ~all"]}	0.0000000500963	13,952,688	2026-04-26	RDAP	1999-04-16	2027-04-16	2026-04-16	GoDaddy.com, LLC	{"raw_response":{"links":[{"rel":"self","href":"https://rdap.verisign.com/com/v1/domain/VCALC.COM","type":"application/rdap+json","value":"https://rdap.verisign.com/com/v1/domain/VCALC.COM"},{"rel":"related","href":"https://rdap.godaddy.com/v1/domain/VCALC.COM","type":"application/rdap+json","value":"https://rdap.godaddy.com/v1/domain/VCALC.COM"}],"events":[{"eventDate":"1999-04-16T04:00:00Z","eventAction":"registration"},{"eventDate":"2027-04-16T04:00:00Z","eventAction":"expiration"},{"eventDate":"2026-04-16T11:45:32Z","eventAction":"last changed"},{"eventDate":"2026-04-25T22:39:25Z","eventAction":"last update of RDAP database"}],"handle":"5347123_DOMAIN_COM-VRSN","status":["client delete prohibited","client renew prohibited","client transfer prohibited","client update prohibited"],"ldhName":"VCALC.COM","notices":[{"links":[{"rel":"terms-of-service","href":"https://www.verisign.com/domain-names/registration-data-access-protocol/terms-service/index.xhtml","type":"text/html","value":"https://rdap.verisign.com/com/v1/domain/vcalc.com"}],"title":"Terms of Service","description":["Service subject to Terms of Use."]},{"links":[{"href":"https://icann.org/epp","type":"text/html"}],"title":"Status Codes","description":["For more information on domain status codes, please visit https://icann.org/epp"]},{"links":[{"rel":"help","href":"https://icann.org/wicf","type":"text/html","value":"https://rdap.verisign.com/com/v1/domain/vcalc.com"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://icann.org/wicf"]}],"entities":[{"links":[{"rel":"about","href":"http://www.godaddy.com","type":"text/html","value":"https://rdap.godaddy.com/v1/"}],"roles":["registrar"],"handle":"146","entities":[{"roles":["abuse"],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""],["tel",{"type":"voice"},"uri","tel:480-624-2505"],["email",{},"text","abuse@godaddy.com"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"146"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","GoDaddy.com, LLC"]]],"objectClassName":"entity"}],"secureDNS":{"delegationSigned":false},"nameservers":[{"ldhName":"DNS1.STABLETRANSIT.COM","objectClassName":"nameserver"},{"ldhName":"DNS2.STABLETRANSIT.COM","objectClassName":"nameserver"}],"objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_technical_implementation_guide_1","icann_rdap_response_profile_1"]}}	Domain is active
tarcza.malopolska.pl	malopolska.pl	pl	ICANN	HTTP 200	54.36.172.202	FR	—	2026-09-20	ZK, HSTS, Java, Nginx, HTTP/2, Favicon, OVHcloud, reCAPTCHA	2026-09-20	TRUE	{"A":["54.36.172.202"],"MX":[{"host":"mx0.mail.ovh.net","priority":1},{"host":"mx1.mail.ovh.net","priority":10},{"host":"mx2.mail.ovh.net","priority":20},{"host":"mx3.mail.ovh.net","priority":30},{"host":"mx4.mail.ovh.net","priority":40}],"NS":["dns16.ovh.net","ns16.ovh.net"],"SOA":{"mname":"dns16.ovh.net","retry":3600,"rname":"tech.ovh.net","expire":3600000,"serial":2024072100,"minimum":300,"refresh":86400},"TXT":["1\|www.tarcza.malopolska.pl","4815741e868e7997017a9dc15592a43a3dc0d4410a1e22e3d6031d54085a1f7","v=spf1 mx a include:_spf.emaillabs.net.pl include:mx.ovh.com ~all"]}	0.000000013159	11,333,571	2026-04-26	RDAP	2020-04-14	2027-04-14	2026-04-13	OVH SAS	{"raw_response":{"links":[{"rel":"self","href":"https://rdap.dns.pl/domain/tarcza.malopolska.pl","type":"application/rdap+json","value":"https://rdap.dns.pl/domain/tarcza.malopolska.pl"}],"events":[{"eventDate":"2020-04-14T10:47:49Z","eventAction":"registration"},{"eventDate":"2026-04-13T04:50:30Z","eventAction":"last changed"},{"eventDate":"2026-04-26T04:50:31.503659448Z","eventAction":"last update of RDAP database"},{"eventDate":"2027-04-14T10:47:49Z","eventAction":"expiration"}],"port43":"whois.dns.pl","ldhName":"tarcza.malopolska.pl","notices":[{"links":[{"rel":"related","href":"https://www.dns.pl/en/domain_name_life_cycle","type":"text/html","value":"https://www.dns.pl/en/domain_name_life_cycle"}],"title":"Domain name life cycle","description":["For more information on domain name life cycle, please visit https://www.dns.pl/en/domain_name_life_cycle"]},{"links":[{"rel":"related","href":"https://www.dns.pl/en/RDAP_in_NASK","type":"text/html","value":"https://www.dns.pl/en/RDAP_in_NASK"}],"title":"Delay in data display","description":["RDAP displays data with a delay not exceeding 15 minutes in relation to the .pl Registry system. For more information on RDAP in NASK, please visit: https://www.dns.pl/en/RDAP_in_NASK"]}],"remarks":[{"type":"object truncated due to authorization","title":"REDACTED FOR PRIVACY","description":["The object does not contain all data due to lack of authorization."]}],"entities":[{"roles":["registrant"],"remarks":[{"type":"object truncated due to authorization","title":"REDACTED FOR PRIVACY","description":["The object does not contain all data due to lack of authorization."]}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","Małopolskie Centrum Przedsiębiorczości"],["kind",{},"text","org"],["org",{},"text"],["adr",{"cc":"PL"},"text",["","","Jasnogórska 11","Kraków","","31-358",""]],["tel",{"type":"VOICE"},"uri","tel:+48.730778394"]]],"objectClassName":"entity"},{"roles":["registrar"],"remarks":[{"type":"object truncated due to authorization","title":"REDACTED FOR PRIVACY","description":["The object does not contain all data due to lack of authorization."]}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","OVH SAS"],["kind",{},"text","org"],["adr",{"cc":"FR"},"text",["","","2 Rue Kellermann","Roubaix","","59100",""]],["tel",{"type":"VOICE"},"uri","tel:+48.717500200"],["url",{},"uri","https://www.ovhcloud.com"]]],"objectClassName":"entity"}],"secureDNS":{"delegationSigned":false},"nameservers":[{"ldhName":"ns16.ovh.net","remarks":[{"type":"object truncated due to authorization","title":"REDACTED FOR PRIVACY","description":["The object does not contain all data due to lack of authorization."]}],"objectClassName":"nameserver"},{"ldhName":"dns16.ovh.net","remarks":[{"type":"object truncated due to authorization","title":"REDACTED FOR PRIVACY","description":["The object does not contain all data due to lack of authorization."]}],"objectClassName":"nameserver"}],"nask0_state":"registered","nask0_option":{"events":[{"eventDate":"2026-04-11T15:37:05Z","eventAction":"registration"},{"eventDate":"2029-04-11T15:37:05Z","eventAction":"expiration"}],"ldhName":"tarcza.malopolska.pl","remarks":[{"type":"object truncated due to authorization","title":"REDACTED FOR PRIVACY","description":["The object does not contain all data due to lack of authorization."]}],"objectClassName":"nask0_option"},"objectClassName":"domain","rdapConformance":["rdap_level_0","nask0"]}}	Domain is active
versicherungskanzlei.co.at	co.at	at	ICANN	HTTP 200	144.76.58.144	DE	{"facebook":["https://facebook.com/versicherungskanzlei"]}	2026-09-21	ZK, Java, Osano, cdnjs, jQuery, Favicon, FancyBox, Bootstrap 3, jQuery UI, Cloudflare	2026-09-21	TRUE	{"A":["144.76.58.144"],"MX":[{"host":"versicherungskanzlei-co-at.mail.protection.outlook.com","priority":0}],"NS":["ns1.easyname.eu","ns2.easyname.eu"],"SOA":{"mname":"ns1.easyname.eu","retry":3600,"rname":"hostmaster.easyname.eu","expire":604800,"serial":2025051401,"minimum":600,"refresh":10800},"TXT":["MS=ms36068228","v=spf1 include:spf.protection.outlook.com -all"]}	0.0000000105821	7,725,792	2026-09-20	WHOIS	—	—	2008-03-27	easyname GmbH ( https://nic.at/registrar/414 )	{"raw_response":"% Copyright (c)2026 by NIC.AT (1) \n%\n% Restricted rights.\n%\n% Except for agreed Internet operational purposes, no part of this\n% information may be reproduced, stored in a retrieval system, or\n% transmitted, in any form or by any means, electronic, mechanical,\n% recording, or otherwise, without prior permission of NIC.AT on behalf\n% of itself and/or the copyright holders. Any use of this material to\n% target advertising or similar activities is explicitly forbidden and\n% can be prosecuted.\n%\n% It is furthermore strictly forbidden to use the Whois-Database in such\n% a way that jeopardizes or could jeopardize the stability of the\n% technical systems of NIC.AT under any circumstances. In particular,\n% this includes any misuse of the Whois-Database and any use of the\n% Whois-Database which disturbs its operation.\n%\n% Should the user violate these points, NIC.AT reserves the right to\n% deactivate the Whois-Database entirely or partly for the user.\n% Moreover, the user shall be held liable for any and all damage\n% arising from a violation of these points.\n\ndomain: versicherungskanzlei.co.at\nregistrar: easyname GmbH ( https://nic.at/registrar/414 )\nregistrant: <data not disclosed>\ntech-c: <data not disclosed>\nnserver: ns1.easyname.eu\nnserver: ns2.easyname.eu\nchanged: 20080327 21:48:28\nsource: AT-DOM"}	Domain is active
vseveda.org	org	org	ICANN	HTTP 200	5.178.86.203	RU	—	2026-09-21	ZK, Java, HTTP/2, Favicon, OpenSSL 1.1.1m, Bootstrap, Open Graph, Font Awesome, Windows Server, Apache HTTP Server 2.4.52	2026-09-20	TRUE	{"A":["5.178.86.203"],"MX":[{"host":"mx.yandex.ru","priority":10}],"NS":["dns1.yandex.net","dns2.yandex.net"],"SOA":{"mname":"dns1.yandex.net","retry":90,"rname":"dns-hosting.yandex.ru","expire":86400,"serial":29,"minimum":900,"refresh":900},"TXT":["mailru-verification: 145ccc6a124fc289","unione-validate-hash=4ce49c684c9bb7188cac4533e51b5181","v=spf1 redirect=_spf.yandex.net"]}	0.00000000639039	12,699,935	2026-03-29	RDAP	2013-03-27	2027-03-27	2026-03-07	Regional Network Information Center, JSC dba RU-CENTER	{"raw_response":{"links":[{"rel":"related","href":"https://rdap.nic.ru/domain/vseveda.org","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/vseveda.org"},{"rel":"self","href":"https://rdap.publicinterestregistry.org/rdap/domain/vseveda.org","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/vseveda.org"}],"events":[{"eventDate":"2020-02-12T10:13:10.19Z","eventAction":"transfer"},{"eventDate":"2027-03-27T06:38:29.194Z","eventAction":"expiration"},{"eventDate":"2013-03-27T06:38:29.194Z","eventAction":"registration"},{"eventDate":"2026-03-07T12:57:50.024Z","eventAction":"last changed"},{"eventDate":"2026-03-29T15:11:13.392Z","eventAction":"last update of RDAP database"}],"status":["client transfer prohibited"],"ldhName":"vseveda.org","notices":[{"links":[{"rel":"terms-of-service","href":"https://thenew.org/org-people/about-pir/policies/","type":"text/html","value":"https://rdap.publicinterestregistry.org/rdap/domain/vseveda.org"}],"title":"Terms of Service","description":["Public Interest Registry provides this RDAP service for informational purposes only, and to assist persons in obtaining information about or related to a domain name registration record. Public Interest Registry does not guarantee its accuracy. Users accessing the Public Interest Registry RDAP service agree to use the data only for lawful purposes, and under no circumstances may this data be used to: a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the registrar's own existing customers and b) enable high volume, automated, electronic processes that send queries or data to the systems of Public Interest Registry or any ICANN-accredited registrar, except as reasonably necessary to register domain names or modify existing registrations. When using the Public Interest Registry RDAP service, please consider the following: the RDAP service is not a replacement for standard EPP commands to the SRS service. RDAP is not considered authoritative for registered domain objects. The RDAP service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the RDAP services are throttled. If too many queries are received from a single IP address within a specified time, the service will begin to reject further queries for a period of time to prevent disruption of RDAP service access. Abuse of the RDAP system through data mining is mitigated by detecting and limiting bulk query access from single sources. Where applicable, the presence of a [Non-Public Data] tag indicates that such data is not made publicly available due to applicable data privacy laws or requirements. Should you wish to contact the registrant, please refer to the RDAP records available through the registrar URL listed above. Access to non-public data may be provided, upon request, where it can be reasonably confirmed that the requester holds a specific legitimate interest and a proper legal basis for accessing the withheld data. Access to this data can be requested by submitting a request to WHOISrequest@pir.org. Public Interest Registry Inc. reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy."]},{"links":[{"rel":"glossary","href":"https://icann.org/epp","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/vseveda.org"}],"title":"Status Codes","description":["For more information on domain status codes, please visit https://icann.org/epp"]},{"links":[{"rel":"help","href":"https://icann.org/wicf","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/vseveda.org"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://icann.org/wicf"]}],"entities":[{"links":[{"rel":"self","href":"https://rdap.publicinterestregistry.org/rdap/entity/463","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/entity/463"},{"rel":"about","href":"https://rdap.nic.ru/","type":"application/rdap+json","value":"https://rdap.nic.ru/"}],"roles":["registrar"],"handle":"463","entities":[{"roles":["abuse"],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""],["tel",{"type":"voice"},"uri","tel:+7.4959944601"],["email",{},"text","tld-adm@nic.ru"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"463"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","Regional Network Information Center, JSC dba RU-CENTER"]]],"objectClassName":"entity"}],"redacted":[{"name":{"type":"Registry Domain ID"},"method":"removal","prePath":"$.handle","pathLang":"jsonpath"}],"secureDNS":{"maxSigLife":1,"delegationSigned":false},"nameservers":[{"handle":"581e39df14ef4bf5b378a5948814bfc2-LROR","status":["associated"],"ldhName":"dns1.yandex.net","unicodeName":"dns1.yandex.net","objectClassName":"nameserver"},{"handle":"50e056f7a1144250aaa0f813e8bf8575-LROR","status":["associated"],"ldhName":"dns2.yandex.net","unicodeName":"dns2.yandex.net","objectClassName":"nameserver"}],"unicodeName":"vseveda.org","objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_response_profile_1","icann_rdap_technical_implementation_guide_1","redacted"]}}	Domain is active
atzgersdorf.info	info	info	ICANN	HTTP 200	144.76.58.144	DE	{"facebook":["https://facebook.com/handball4fans","https://facebook.com/profile.php?fref=ts&id=100011690325161"],"instagram":["https://instagram.com/wat.atzgersdorf"]}	2026-09-27	ZK, RSS, Java, Slick, jQuery, Favicon, FancyBox, Bootstrap 3, jQuery UI, Open Graph	2026-09-27	TRUE	{"A":["144.76.58.144"],"MX":[{"host":"mx.hover.com.cust.hostedemail.com","priority":10}],"NS":["ns1.hover.com","ns2.hover.com"],"SOA":{"mname":"ns1.hover.com","retry":900,"rname":"dnsmaster.hover.com","expire":604800,"serial":1724680083,"minimum":300,"refresh":1800}}	0.0000000060547	12,084,153	2026-03-31	RDAP	2004-02-27	2027-02-27	2026-03-03	Tucows Domains Inc.	{"raw_response":{"links":[{"rel":"related","href":"https://opensrs.rdap.tucows.com/domain/atzgersdorf.info","type":"application/rdap+json","value":"https://rdap.identitydigital.services/rdap/domain/atzgersdorf.info"},{"rel":"self","href":"https://rdap.identitydigital.services/rdap/domain/atzgersdorf.info","type":"application/rdap+json","value":"https://rdap.identitydigital.services/rdap/domain/atzgersdorf.info"}],"events":[{"eventDate":"2027-02-27T10:03:38.235Z","eventAction":"expiration"},{"eventDate":"2004-02-27T10:03:38.235Z","eventAction":"registration"},{"eventDate":"2026-03-03T08:34:23.467Z","eventAction":"last changed"},{"eventDate":"2026-03-31T19:34:16.348Z","eventAction":"last update of RDAP database"}],"status":["active"],"ldhName":"atzgersdorf.info","notices":[{"links":[{"rel":"terms-of-service","href":"https://www.identity.digital/policies/rdds-access-policy","type":"text/html","value":"https://rdap.identitydigital.services/rdap/domain/atzgersdorf.info"}],"title":"Terms of Service","description":["Access to RDAP information is provided to assist persons in determining the contents of a domain name registration record in the registry database. The data in this record is provided by Identity Digital or, if the record pertains to a TLD not operated by Identity Digital, then the corresponding primary Registry Operator for informational purposes only, and neither Identity Digital nor the Registry Operator guarantee its accuracy. This service is intended only for query-based access. You agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data to (a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the data recipient's own existing customers; or (b) enable high volume, automated, electronic processes that send queries or data to the systems of Identity Digital, a Registrar, or Registry Operator except as reasonably necessary to register domain names or modify existing registrations. When using the RDAP service, please consider the following: the RDAP service is not a replacement for standard EPP commands to the SRS service. RDAP is not considered authoritative for registered domain objects. The RDAP service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the RDAP services are throttled. If too many queries are received from a single IP address within a specified time, the service will begin to reject further queries for a period of time to prevent disruption of RDAP service access. Abuse of the RDAP system through data mining is mitigated by detecting and limiting bulk query access from single sources. Where applicable, the presence of a [Non-Public Data] tag indicates that such data is not made publicly available due to applicable data privacy laws or requirements. Should you wish to contact the registrant, please refer to the RDAP records available through the registrar URL listed above. Access to non-public data may be provided, upon request, where it can be reasonably confirmed that the requester holds a specific legitimate interest and a proper legal basis for accessing the withheld data. Access to the data provided by Identity Digital can be requested by submitting a request via the form found at https://www.identity.digital/about/policies/whois-layered-access/ Identity Digital Inc. and, if applicable, the primary Registry Operators reserve the right to modify these terms at any time. By submitting this query, you agree to abide by this policy."]},{"links":[{"rel":"glossary","href":"https://icann.org/epp","type":"application/rdap+json","value":"https://rdap.identitydigital.services/rdap/domain/atzgersdorf.info"}],"title":"Status Codes","description":["For more information on domain status codes, please visit https://icann.org/epp"]},{"links":[{"rel":"help","href":"https://icann.org/wicf","type":"application/rdap+json","value":"https://rdap.identitydigital.services/rdap/domain/atzgersdorf.info"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://icann.org/wicf"]}],"entities":[{"links":[{"rel":"self","href":"https://rdap.identitydigital.services/rdap/entity/69","type":"application/rdap+json","value":"https://rdap.identitydigital.services/rdap/entity/69"},{"rel":"about","href":"https://opensrs.rdap.tucows.com/","type":"application/rdap+json","value":"https://opensrs.rdap.tucows.com/"}],"roles":["registrar"],"handle":"69","entities":[{"roles":["abuse"],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""],["tel",{"type":"voice"},"uri","tel:+1.4165350123"],["email",{},"text","compliance@tucows.com"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"69"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","Tucows Domains Inc."]]],"objectClassName":"entity"}],"redacted":[{"name":{"type":"Registry Domain ID"},"method":"removal","prePath":"$.handle","pathLang":"jsonpath"}],"secureDNS":{"maxSigLife":1,"delegationSigned":false},"nameservers":[{"handle":"dca5c2413482467a9dc44e8c8762b1d6-DONUTS","status":["associated"],"ldhName":"ns1.domaindirect.com","unicodeName":"ns1.domaindirect.com","objectClassName":"nameserver"},{"handle":"ff632318d37f4b37826dd6d12aa7761b-DONUTS","status":["associated"],"ldhName":"ns2.domaindirect.com","unicodeName":"ns2.domaindirect.com","objectClassName":"nameserver"},{"handle":"76d9faf6a54f4ea3a71f88a8e91fb66a-DONUTS","status":["associated"],"ldhName":"ns3.domaindirect.com","unicodeName":"ns3.domaindirect.com","objectClassName":"nameserver"}],"unicodeName":"atzgersdorf.info","objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_response_profile_1","icann_rdap_technical_implementation_guide_1","redacted"]}}	Domain is active
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About ZK

A framework filed under a browser category but written in a server language is always worth a second look. ZK is recorded in our data with a category of Web frameworks and a primary language of Java, and the tension between those two fields is the whole story of the product.

The model is server centric. The interface is declared and driven from application code running on a server, and the browser receives generated markup plus a client runtime that keeps the two in sync, which is why the fingerprint lands in the page while the real application is a Java deployment sitting behind it. Detecting the framework on a domain therefore says more about the back end than about the front end. There is an application server, a JVM, and usually an internal engineering team or a systems integrator rather than a web design agency.

The vendor is recorded as Potix Corporation and the distribution is LGPL, an open core arrangement in which the freely licensed edition covers the framework while a commercial edition adds components and support. Releases reach back to 2005, placing the framework in the generation of enterprise web toolkits designed before single page applications became the default assumption. As of October 2026 we detect it on 84 sites.

The count is modest and the population is unusual, which is exactly what makes it worth having. Frameworks of this kind concentrate in government portals, banking back offices, logistics and inventory systems, healthcare administration, and industrial suppliers, the sort of organisation that buys software to run a process and never builds a public brand around its stack. A list of those domains is hard to assemble any other way, because such organisations do not answer developer surveys, do not publish their architecture, and rarely surface in the sources marketers normally scrape.

The name is short enough to collide with unrelated projects and abbreviations, so the figure should be read as domains where the framework's own client runtime was matched, not as every appearance of those letters on the web.

Within that boundary the export answers what a per domain lookup cannot. Where the deployments cluster by country and top level domain, which web servers and analytics sit in front of them, how many are still receiving updates, and whether the population is contracting as legacy portals are rewritten. Migration consultancies, Java tooling vendors, and competitors selling replacements need the population itself, not confirmation about a single site.

Frequently asked questions

How many websites use ZK?

webatla detects ZK on 84 websites, refreshed daily, each with its domain, DNS, WHOIS, IP, country and ranking.

Can I download the list of websites using ZK?

Yes, as structured JSONL. Grab a free sample first.

What's included for each site, and how fresh is it?

Domain, DNS, RDAP/WHOIS, the full technology stack, IP & country, PageRank and Harmonic, re-detected and re-exported daily.

How do I find the websites using ZK?

Buy the technology dataset, then download the complete list of domains we detect using ZK, re-exported every day.

What else is in the ZK technology data?

Each row places ZK next to the other technology on the same site, plus DNS, WHOIS, IP, country and ranking.

Can I download just the sites using ZK, or the whole database?

Both. Every site running ZK comes in the Technologies dataset, one downloadable file. Or buy All data for the entire database: technologies plus identity, ranking, DNS and RDAP/WHOIS for every domain, combined in one file. Daily fresh export.

How do I download the list of websites using ZK?

Three steps: (1) grab the free 10,000-row sample to inspect the schema, (2) buy the Technologies dataset, (3) download the full list of every domain we detect running ZK as a JSON Lines file. It is re-exported daily, so you can re-download the freshest list any time inside your access window. Each row carries the domain plus DNS, WHOIS, IP, hosting country and rank.