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Download websites that use H2O

Name: Websites that use H2O
Creator: webatla
License: https://webatla.com/terms

650 live sites using H2O right now

Server Software · since 2014 · open source

650 sites Dataset updated · 2026-08-17

Categories Web servers

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About H2O Database preview Versions Download

About H2O

webatla tracks 650 live websites using H2O, 0.0% of every site we index. Download the full list of websites that use H2O as a daily JSONL export. Every record includes the domain plus DNS, WHOIS, IP address, hosting country and global rank.

H2O is a high-performance, open-source HTTP/1.1, HTTP/2, and HTTP/3 server developed primarily by Kazuho Oku and contributors. Written in C, H2O was designed from the ground up to maximize throughput and minimize latency, featuring an event-driven architecture with support for QUIC and TLS 1.3.

H2O is notable for its early and complete implementation of HTTP/2 server push, header compression, and prioritization. It is used by performance-conscious organizations as a front-end server or reverse proxy. H2O supports Mruby scripting for flexible request/response handling and integrates with standard Unix tools. The project is distributed under the MIT license and maintained as an open-source community project.

At a glance

Websitegithub.com ↗

LanguageC

LicenseMIT

First release2014-01-01

All figures as of Aug 17, 2026

650 Sites detected

0.0% Of all websites

2.3.0 Most used version

Database preview of H2O sites

H2O detection is a value inside the Technologies column. Two datasets carry it, switch between them to compare what's included.

webatla-technologies-h2o-2026-08-17.jsonl.zst · 650 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
andydavies.me	me	me	ICANN	HTTP 200	178.62.63.18	GB	{"x-twitter":["https://twitter.com/andydavies"]}	2026-07-22	C, H2O 2.3.0, RSS, Ruby, HTTP/2, Jekyll, jQuery, Favicon, GoDaddy, Modernizr	0.0000019149	15,347,253	2011-09-27	2028-09-27
rgbstock.com	com	com	ICANN	HTTP 200	5.9.104.5	DE	{"reddit":["https://reddit.com/r/rgbstock"],"facebook":["https://facebook.com/rgbstock.photos"],"instagram":["https://instagram.com/rgbstock"],"pinterest":["https://pinterest.com/rgbstock/favorite-wwwrgbstockcom-photos"],"x-twitter":["https://twitter.com/rgbstockcom"]}	2026-08-16	C, H2O, RSS, HTTP/2, Favicon, hreflang, Google AdSense, Google Font API	0.000000304211	16,976,802	2009-08-11	2026-08-11
peco-japan.com	com	com	ICANN	HTTP 200	13.113.85.6	JP	{"youtube":["https://youtube.com/channel/UCdU0lALBi35E1vqwpbZrzSw"],"facebook":["https://facebook.com/pages/PECO%E3%83%9A%E3%82%B3/399909446834300"],"instagram":["https://instagram.com/pecodogs?hl=ja","https://instagram.com/pecocats?hl=ja"],"x-twitter":["https://twitter.com/PECO_japan"]}	2026-08-14	C, H2O 2.2.3, cdnjs, HTTP/2, jQuery 3.1.13, Favicon, Outbrain, Cloudflare, Google Ads, Open Graph	0.0000000756424	16,842,428	2014-11-28	2026-11-28
lowreal.net	net	net	ICANN	HTTP 200	160.16.210.51	JP	{"github":["https://github.com/sponsors/cho45?amount=3&frequency=one-time","https://github.com/dandavison/delta","https://github.com/cho45"]}	2026-08-09	C, H2O 2.3.0, PWA, RSS, HSTS, HTTP/2, HTTP/3, Favicon, Cloudflare, Open Graph	0.0000000640587	16,730,547	2004-04-05	2030-04-05
hsbt.org	org	org	ICANN	HTTP 200	188.114.96.3	US	{"github":["https://github.com/hsbt"],"facebook":["https://facebook.com/hiroshi.sbt"],"x-twitter":["https://twitter.com/hsbt"]}	2026-08-05	C, H2O 2.2.5, HTTP/2, OpenAI, Favicon, Cloudflare, Google Analytics GA4	0.0000000277817	13,890,097	2004-04-08	2027-04-08
…	…	…	…	…	…	…	…	…	…	…	…	…	…

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
andydavies.me	me	me	ICANN	HTTP 200	178.62.63.18	GB	{"x-twitter":["https://twitter.com/andydavies"]}	2026-07-22	C, H2O 2.3.0, RSS, Ruby, HTTP/2, Jekyll, jQuery, Favicon, GoDaddy, Modernizr	2026-08-08	TRUE	{"A":["178.62.63.18"],"MX":[{"host":"mail.vhdns.net","priority":0},{"host":"mx.daily.co.uk","priority":10}],"NS":["ns41.domaincontrol.com","ns42.domaincontrol.com"],"SOA":{"mname":"ns41.domaincontrol.com","retry":7200,"rname":"dns.jomax.net","expire":604800,"serial":2024113000,"minimum":600,"refresh":28800},"TXT":["google-site-verification=oLYv-8sfM6T5JuvdNftrIF-ADT8URHpHigQ702W00Qk","yandex-verification: b5630dd197270b28"]}	0.0000019149	15,347,253	2025-07-06	WHOIS	2011-09-27	2028-09-27	2024-11-30	Mesh Digital Limited	{"raw_response":"Domain Name: andydavies.me\r\nRegistry Domain ID: c9e948ce340a4855902a36dd86e3b38a-DONUTS\r\nRegistrar WHOIS Server: domains.meshdigital.com\r\nRegistrar URL: http://www.domainbox.com\r\nUpdated Date: 2024-11-30T16:21:16Z\r\nCreation Date: 2011-09-27T10:14:30Z\r\nRegistry Expiry Date: 2028-09-27T10:14:30Z\r\nRegistrar: Mesh Digital Limited\r\nRegistrar IANA ID: 1390\r\nRegistrar Abuse Contact Email: abuse@domainbox.com\r\nRegistrar Abuse Contact Phone: +1.8779770099\r\nDomain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited\r\nDomain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited\r\nDomain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited\r\nDomain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited\r\nRegistry Registrant ID: REDACTED\r\nRegistrant Name: REDACTED\r\nRegistrant Organization: Domains By Proxy, LLC\r\nRegistrant Street: REDACTED\r\nRegistrant City: REDACTED\r\nRegistrant State/Province: Arizona\r\nRegistrant Postal Code: REDACTED\r\nRegistrant Country: US\r\nRegistrant Phone: REDACTED\r\nRegistrant Phone Ext: REDACTED\r\nRegistrant Fax: REDACTED\r\nRegistrant Fax Ext: REDACTED\r\nRegistrant Email: REDACTED\r\nRegistry Admin ID: REDACTED\r\nAdmin Name: REDACTED\r\nAdmin Organization: REDACTED\r\nAdmin Street: REDACTED\r\nAdmin City: REDACTED\r\nAdmin State/Province: REDACTED\r\nAdmin Postal Code: REDACTED\r\nAdmin Country: REDACTED\r\nAdmin Phone: REDACTED\r\nAdmin Phone Ext: REDACTED\r\nAdmin Fax: REDACTED\r\nAdmin Fax Ext: REDACTED\r\nAdmin Email: REDACTED\r\nRegistry Tech ID: REDACTED\r\nTech Name: REDACTED\r\nTech Organization: REDACTED\r\nTech Street: REDACTED\r\nTech City: REDACTED\r\nTech State/Province: REDACTED\r\nTech Postal Code: REDACTED\r\nTech Country: REDACTED\r\nTech Phone: REDACTED\r\nTech Phone Ext: REDACTED\r\nTech Fax: REDACTED\r\nTech Fax Ext: REDACTED\r\nTech Email: REDACTED\r\nName Server: ns41.domaincontrol.com\r\nName Server: ns42.domaincontrol.com\r\nDNSSEC: unsigned\r\nURL of the ICANN Whois Inaccuracy Complaint Form: https://icann.org/wicf/\r\n>>> Last update of WHOIS database: 2025-07-06T12:28:09Z <<<\r\n\r\nFor more information on Whois status codes, please visit https://icann.org/epp\r\n\r\nTerms of Use: Access to WHOIS 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 the Registry Operator for informational purposes only, and accuracy is not guaranteed. 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 Registry Operator, a Registrar, or Identity Digital except as reasonably necessary to register domain names or modify existing registrations. When using the Whois service, please consider the following: The Whois service is not a replacement for standard EPP commands to the SRS service. Whois is not considered authoritative for registered domain objects. The Whois service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the Whois 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 Whois service access. Abuse of the Whois 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 Whois 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 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/. The Registrar of Record identified in this output may have an RDDS service that can be queried for additional information on how to contact the Registrant, Admin, or Tech contact of the queried domain name. Identity Digital Inc. and Registry Operator reserve the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.\r\n"}	Domain is active
rgbstock.com	com	com	ICANN	HTTP 200	5.9.104.5	DE	{"reddit":["https://reddit.com/r/rgbstock"],"facebook":["https://facebook.com/rgbstock.photos"],"instagram":["https://instagram.com/rgbstock"],"pinterest":["https://pinterest.com/rgbstock/favorite-wwwrgbstockcom-photos"],"x-twitter":["https://twitter.com/rgbstockcom"]}	2026-08-16	C, H2O, RSS, HTTP/2, Favicon, hreflang, Google AdSense, Google Font API	2026-08-07	TRUE	{"A":["5.9.104.5"],"MX":[{"host":"mail.rgbstock.info","priority":100}],"NS":["ns10.dnsmadeeasy.com","ns11.dnsmadeeasy.com","ns12.dnsmadeeasy.com","ns13.dnsmadeeasy.com","ns14.dnsmadeeasy.com","ns15.dnsmadeeasy.com"],"SOA":{"mname":"ns10.dnsmadeeasy.com","retry":3600,"rname":"dns.dnsmadeeasy.com","expire":1209600,"serial":2009010473,"minimum":180,"refresh":43200},"TXT":["v=spf1 mx -all"]}	0.000000304211	16,976,802	2026-08-10	RDAP	2009-08-11	2026-08-11	2024-08-12	GoDaddy.com, LLC	{"raw_response":{"links":[{"rel":"self","href":"https://rdap.verisign.com/com/v1/domain/rgbstock.com","type":"application/rdap+json","value":"https://rdap.verisign.com/com/v1/domain/rgbstock.com"},{"rel":"related","href":"https://rdap.godaddy.com/v1/domain/RGBSTOCK.COM","type":"application/rdap+json","value":"https://rdap.verisign.com/com/v1/domain/rgbstock.com"}],"events":[{"eventDate":"2009-08-11T09:41:42Z","eventAction":"registration"},{"eventDate":"2026-08-11T09:41:42Z","eventAction":"expiration"},{"eventDate":"2024-08-12T12:15:21Z","eventAction":"last changed"},{"eventDate":"2026-08-09T23:08:01Z","eventAction":"last update of RDAP database"}],"handle":"1565240909_DOMAIN_COM-VRSN","status":["client delete prohibited","client renew prohibited","client transfer prohibited","client update prohibited"],"ldhName":"RGBSTOCK.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/rgbstock.com"}],"title":"Terms of Service","description":["Service subject to Terms of Use."]},{"links":[{"rel":"glossary","href":"https://icann.org/epp","type":"text/html","value":"https://rdap.verisign.com/com/v1/domain/rgbstock.com"}],"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/rgbstock.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":"NS10.DNSMADEEASY.COM","objectClassName":"nameserver"},{"ldhName":"NS11.DNSMADEEASY.COM","objectClassName":"nameserver"},{"ldhName":"NS12.DNSMADEEASY.COM","objectClassName":"nameserver"},{"ldhName":"NS13.DNSMADEEASY.COM","objectClassName":"nameserver"},{"ldhName":"NS14.DNSMADEEASY.COM","objectClassName":"nameserver"},{"ldhName":"NS15.DNSMADEEASY.COM","objectClassName":"nameserver"}],"objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_technical_implementation_guide_1","icann_rdap_response_profile_1"]}}	Domain is active
peco-japan.com	com	com	ICANN	HTTP 200	13.113.85.6	JP	{"youtube":["https://youtube.com/channel/UCdU0lALBi35E1vqwpbZrzSw"],"facebook":["https://facebook.com/pages/PECO%E3%83%9A%E3%82%B3/399909446834300"],"instagram":["https://instagram.com/pecodogs?hl=ja","https://instagram.com/pecocats?hl=ja"],"x-twitter":["https://twitter.com/PECO_japan"]}	2026-08-14	C, H2O 2.2.3, cdnjs, HTTP/2, jQuery 3.1.13, Favicon, Outbrain, Cloudflare, Google Ads, Open Graph	2026-08-16	TRUE	{"A":["13.113.85.6","54.178.237.27"],"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":["ns-1151.awsdns-15.org","ns-1688.awsdns-19.co.uk","ns-299.awsdns-37.com","ns-951.awsdns-54.net"],"SOA":{"mname":"ns-951.awsdns-54.net","retry":900,"rname":"awsdns-hostmaster.amazon.com","expire":1209600,"serial":1,"minimum":86400,"refresh":7200},"TXT":["MS=ms11168098","google-site-verification=a-eQ5oZvkR_MeFvsCE7mwfMsaEzq4iScHbLWTqb9joEgoogle-site-verification=a-eQ5oZvkR_MeFvsCE7mwfMsaEzq4iScHbLWTqb9joE","v=spf1 include:_spf.google.com include:peco-japan.com ~all"]}	0.0000000756424	16,842,428	2026-02-17	RDAP	2014-11-28	2026-11-28	2026-02-17	GMO Internet Group, Inc. d/b/a Onamae.com	{"raw_response":{"links":[{"rel":"self","href":"https://rdap.verisign.com/com/v1/domain/PECO-JAPAN.COM","type":"application/rdap+json","value":"https://rdap.verisign.com/com/v1/domain/PECO-JAPAN.COM"},{"rel":"related","href":"https://rdap.gmo-onamae.com/rdap/v1/domain/PECO-JAPAN.COM","type":"application/rdap+json","value":"https://rdap.gmo-onamae.com/rdap/v1/domain/PECO-JAPAN.COM"}],"events":[{"eventDate":"2014-11-28T02:15:20Z","eventAction":"registration"},{"eventDate":"2026-11-28T02:15:20Z","eventAction":"expiration"},{"eventDate":"2025-11-12T15:25:38Z","eventAction":"last changed"},{"eventDate":"2026-02-17T14:01:39Z","eventAction":"last update of RDAP database"}],"handle":"1887586153_DOMAIN_COM-VRSN","status":["active"],"ldhName":"PECO-JAPAN.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/peco-japan.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/peco-japan.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://gmo.jp","type":"text/html","value":"https://rdap.gmo-onamae.com/rdap/v1/"}],"roles":["registrar"],"handle":"49","entities":[{"roles":["abuse"],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""],["tel",{"type":"voice"},"uri","tel:+81.337709199"],["email",{},"text","abuse@internet.gmo"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"49"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","GMO Internet Group, Inc. d/b/a Onamae.com"]]],"objectClassName":"entity"}],"secureDNS":{"delegationSigned":false},"nameservers":[{"ldhName":"NS-1151.AWSDNS-15.ORG","objectClassName":"nameserver"},{"ldhName":"NS-1688.AWSDNS-19.CO.UK","objectClassName":"nameserver"},{"ldhName":"NS-299.AWSDNS-37.COM","objectClassName":"nameserver"},{"ldhName":"NS-951.AWSDNS-54.NET","objectClassName":"nameserver"}],"objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_technical_implementation_guide_1","icann_rdap_response_profile_1"]},"related_response":{"links":[{"rel":"self","href":"https://rdap.gmo-onamae.com/rdap/v1/domain/peco-japan.com","type":"application/rdap+json","value":"https://rdap.gmo-onamae.com/rdap/v1/domain/peco-japan.com"}],"events":[{"eventDate":"2014-11-27T17:15:20Z","eventAction":"registration"},{"eventDate":"2026-11-27T17:15:20Z","eventAction":"registrar expiration"},{"eventDate":"2025-11-12T15:25:39Z","eventAction":"last changed"},{"eventDate":"2026-02-17T14:01:57Z","eventAction":"last update of RDAP database"}],"handle":"1887586153_DOMAIN_COM-VRSN","port43":"whois.discount-domain.com","status":["validated","active"],"ldhName":"peco-japan.com","notices":[{"links":[{"rel":"alternate","href":"https://icann.org/epp","type":"text/html","value":"https://icann.org/epp"}],"title":"Status Codes","description":["For more information on domain status codes, please visit https://icann.org/epp"]},{"title":"Data Policy","description":["result set truncated due to authorization"]},{"links":[{"rel":"alternate","href":"https://www.icann.org/wicf/","type":"text/html","value":"https://www.icann.org/wicf/"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://www.icann.org/wicf/"]},{"links":[{"rel":"alternate","href":"https://rdap.gmo-onamae.com/tos","type":"text/html","value":"https://rdap.gmo-onamae.com/tos"}],"title":"Terms of Service","description":["Please query the RDAP service of the Registrar of Record identified in this output for information on how to contact the Registrar, Registrant, Admin, or Tech contact of the queried domain name.","","This RDAP service is provided by GMO Internet and only contains information pertaining to Internet domain names we have registered for our customers.","GMO Internet does not guarantee the accuracy of this data.","","By using this service you are agreeing;","","(1) only to use the data for lawful purposes.","(2) not to use any information presented here for any purpose other than determining ownership of domain names.","..."]}],"entities":[{"roles":["registrar"],"handle":"49","entities":[{"roles":["abuse"],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text"],["tel",{"type":"voice"},"uri","tel:+81.337709199"],["email",{},"text","abuse@internet.gmo"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"49"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","GMO Internet, Inc."]]],"objectClassName":"entity"},{"entities":[{"roles":["administrative"],"events":[{"eventDate":"2014-11-28T02:15:16Z","eventAction":"registration"},{"eventDate":"2021-08-24T10:17:30Z","eventAction":"last changed"},{"eventDate":"2026-02-17T14:01:57Z","eventAction":"last update of RDAP database"}],"handle":"COM-149F42E5F11","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","jun okazaki"],["org",{},"text","PECO Inc."],["adr",{"type":"work"},"text",["3-60-7 Sendagaya","Shibuya Ku","Tokyo","151-0051","JP"]],["tel",{"type":"voice"},"text","+81.364079169"],["email",{},"text","sys@peco-japan.com"]]],"objectClassName":"entity"}],"objectClassName":"entity"},{"entities":[{"roles":["registrant"],"events":[{"eventDate":"2014-11-28T02:15:16Z","eventAction":"registration"},{"eventDate":"2021-08-24T10:35:57Z","eventAction":"last changed"},{"eventDate":"2026-02-17T14:01:57Z","eventAction":"last update of RDAP database"}],"handle":"COM-149F42E5F07","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","jun okazaki"],["org",{},"text","PECO Inc."],["adr",{"type":"work"},"text",["3-60-7 Sendagaya","Shibuya Ku","Tokyo","151-0051","JP"]],["tel",{"type":"voice"},"text","+81.364079169"],["email",{},"text","sys@peco-japan.com"]]],"objectClassName":"entity"}],"objectClassName":"entity"},{"entities":[{"roles":["billing"],"events":[{"eventDate":"2014-11-28T02:15:16Z","eventAction":"registration"},{"eventDate":"2021-08-24T10:17:30Z","eventAction":"last changed"},{"eventDate":"2026-02-17T14:01:57Z","eventAction":"last update of RDAP database"}],"handle":"COM-149F42E5F27","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","jun okazaki"],["org",{},"text","PECO Inc."],["adr",{"type":"work"},"text",["3-60-7 Sendagaya","Shibuya Ku","Tokyo","151-0051","JP"]],["tel",{"type":"voice"},"text","+81.364079169"],["email",{},"text","sys@peco-japan.com"]]],"objectClassName":"entity"}],"objectClassName":"entity"},{"entities":[{"roles":["technical"],"events":[{"eventDate":"2014-11-28T02:15:16Z","eventAction":"registration"},{"eventDate":"2021-08-24T10:17:30Z","eventAction":"last changed"},{"eventDate":"2026-02-17T14:01:57Z","eventAction":"last update of RDAP database"}],"handle":"COM-149F42E5F1C","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","jun okazaki"],["org",{},"text","PECO Inc."],["adr",{"type":"work"},"text",["3-60-7 Sendagaya","Shibuya Ku","Tokyo","151-0051","JP"]],["tel",{"type":"voice"},"text","+81.364079169"],["email",{},"text","sys@peco-japan.com"]]],"objectClassName":"entity"}],"objectClassName":"entity"}],"secureDNS":{"delegationSigned":false},"nameservers":[{"ldhName":"ns-1688.awsdns-19.co.uk","objectClassName":"nameserver"},{"ldhName":"ns-299.awsdns-37.com","objectClassName":"nameserver"},{"ldhName":"ns-951.awsdns-54.net","objectClassName":"nameserver"},{"ldhName":"ns-1151.awsdns-15.org","objectClassName":"nameserver"}],"objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_response_profile_0","icann_rdap_technical_implementation_guide_0"]}}	Domain is active
lowreal.net	net	net	ICANN	HTTP 200	160.16.210.51	JP	{"github":["https://github.com/sponsors/cho45?amount=3&frequency=one-time","https://github.com/dandavison/delta","https://github.com/cho45"]}	2026-08-09	C, H2O 2.3.0, PWA, RSS, HSTS, HTTP/2, HTTP/3, Favicon, Cloudflare, Open Graph	2026-08-05	TRUE	{"A":["160.16.210.51"],"DS":[{"digest":"531d99afcf949f1ad0f707183178fbae97f06787316df875a741d782b7e867ac","key_tag":2371,"algorithm":13,"digest_type":2}],"MX":[{"host":"alt1.aspmx.l.google.com","priority":5},{"host":"alt2.aspmx.l.google.com","priority":5},{"host":"aspmx.l.google.com","priority":1},{"host":"aspmx2.googlemail.com","priority":10},{"host":"aspmx3.googlemail.com","priority":10},{"host":"aspmx4.googlemail.com","priority":10},{"host":"aspmx5.googlemail.com","priority":10}],"NS":["bob.ns.cloudflare.com","roxy.ns.cloudflare.com"],"SOA":{"mname":"bob.ns.cloudflare.com","retry":2400,"rname":"dns.cloudflare.com","expire":604800,"serial":2410374018,"minimum":1800,"refresh":10000},"TXT":["google-site-verification=elbLRn5X4T5Sln4BWk_RCDtKlI_bpE4WbX477Ec2Ifs","v=spf1 include:_spf.google.com 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hsbt.org	org	org	ICANN	HTTP 200	188.114.96.3	US	{"github":["https://github.com/hsbt"],"facebook":["https://facebook.com/hiroshi.sbt"],"x-twitter":["https://twitter.com/hsbt"]}	2026-08-05	C, H2O 2.2.5, HTTP/2, OpenAI, Favicon, Cloudflare, Google Analytics GA4	2026-08-12	TRUE	{"A":["188.114.96.3","188.114.97.3"],"DS":[{"digest":"5f0902e8bfc1408ed09e77f9de0316285b4a99348bcfa7f7b91bd013cedacd55","key_tag":2371,"algorithm":13,"digest_type":2}],"MX":[{"host":"route1.mx.cloudflare.net","priority":31},{"host":"route2.mx.cloudflare.net","priority":72},{"host":"route3.mx.cloudflare.net","priority":86}],"NS":["patrick.ns.cloudflare.com","walk.ns.cloudflare.com"],"SOA":{"mname":"patrick.ns.cloudflare.com","retry":2400,"rname":"dns.cloudflare.com","expire":604800,"serial":2411477787,"minimum":1800,"refresh":10000},"TXT":["openai-domain-verification=dv-OjF9RdWqHpSK7jZ97u5RyZkE","v=spf1 include:_spf.mx.cloudflare.net ~all"],"AAAA":["2a06:98c1:3120::3","2a06:98c1:3121::3"],"HTTPS":[{"params":["alpn=h3,h2","ipv4hint=188.114.96.3,188.114.97.3","ech=AEX+DQBBaAAgACCHTs4Gk49piLBnauV3L2XyNZGYJizPMEcl8gWSDAOhUQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA=","ipv6hint=2a06:98c1:3120::3,2a06:98c1:3121::3"],"target":"","priority":1}],"DNSKEY":[{"flags":256,"protocol":3,"algorithm":13,"public_key":"oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA=="},{"flags":257,"protocol":3,"algorithm":13,"public_key":"mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+KkxLbxILfDLUT0rAK9iUzy1L53eKGQ=="}]}	0.0000000277817	13,890,097	2025-08-09	RDAP	2004-04-08	2027-04-08	2025-08-09	Cloudflare, Inc.	{"raw_response":{"links":[{"rel":"related","href":"https://rdap.cloudflare.com/rdap/v1","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/hsbt.org"},{"rel":"self","href":"https://rdap.publicinterestregistry.org/rdap/domain/hsbt.org","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/hsbt.org"}],"events":[{"eventDate":"2024-07-01T11:52:35.801Z","eventAction":"transfer"},{"eventDate":"2027-04-08T03:12:41.595Z","eventAction":"expiration"},{"eventDate":"2004-04-08T03:12:41.595Z","eventAction":"registration"},{"eventDate":"2024-07-06T11:52:36.036Z","eventAction":"last changed"},{"eventDate":"2025-08-09T11:19:03.47Z","eventAction":"last update of RDAP database"}],"status":["client transfer prohibited"],"ldhName":"hsbt.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/hsbt.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. 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Showing 5 of 650 rows · Technologies · Full website tech stack per site: CMS, payments, analytics, frameworks.

↓ Download preview (20 rows, free) Buy Technologies — €159 / month

Version distribution

Detected H2O versions across all 650 sites.

Version	Sites	Share
2.3.0	465	89.4%
2.2.6	25	4.8%
2.2.5	19	3.6%
2.1.0	4	0.8%
2.2.3	3	0.6%

The H2O dataset

Every site we've detected as running H2O, with version, hosting, country, TLD and traffic rank.

H2O lives inside 2 datasets

H2O detection is part of Technologies (€159/mo) and All data (€599/mo). Buy either to filter the full 650-site list, or grab a free preview first.

See datasets ↓ Download free preview (20 rows)

Which websites are using H2O?

webatla detects every site using H2O and exports them as one downloadable list, so you can see who relies on this technology and what else runs alongside it.

Open the H2O technology dataset to break adoption down by country and TLD, compare it with a competing technology, and track new domains over time.

Frequently asked questions

How many websites use H2O?

webatla detects H2O on 650 websites, refreshed daily, each with its domain, DNS, WHOIS, IP, country and ranking.

Can I download the list of websites using H2O?

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 H2O?

Buy the technology dataset, then download the complete list of domains we detect using H2O, re-exported every day.

What else is in the H2O technology data?

Each row places H2O next to the other technology on the same site, plus DNS, WHOIS, IP, country and ranking.

Can I download just the sites using H2O, or the whole database?

Both. Every site running H2O 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 H2O?

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 H2O 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.