.ac.jp
Download .ac.jp domains
3,691 active domains
Public suffix · Under .jp · Operated by Japan Registry Services Co., Ltd. (JPRS)
TLD suffix
-95.94% YoY
Dataset updated · 2026-07-13
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About .ac.jp
.ac.jp is a multi-level public suffix sitting one level below .jp. Suffixes like this exist because registries reserve a second level for specific registrant categories. Registrants treat them as if they were top-level TLDs, and so do webatla datasets.
At a glance
Suffix.ac.jp
Parent TLD.jp
RegistryJapan Registry Services Co., Ltd. (JPRS)
Domains3,691
Growth (YoY)-95.94%
New domain registrations
4
last week
5
last month
Active domains3,691
registered in this zone
Active websites2,908
resolved successfully in the last export
DNS3,685
domains with DNS records
Countries5
countries represented (by hosting IP)
RDAP & WHOIS3,689
domains with RDAP & WHOIS records
Database preview of .ac.jp domains
5 sample rows from the live database. Switch the dataset to see what each one contains, then preview the file or buy the full dataset.
webatla-ac-jp-all-2026-07-13.jsonl.zst · 3,691 rows · 15.4 KB · 23 columns
Daily fresh export
| Domain | TLD suffix | TLD | Domain type |
|---|---|---|---|
| tsuji.ac.jp | ac.jp | jp | ICANN |
| kyoto-u.ac.jp | ac.jp | jp | ICANN |
| tohoku.ac.jp | ac.jp | jp | ICANN |
| umin.ac.jp | ac.jp | jp | ICANN |
| titech.ac.jp | ac.jp | jp | ICANN |
| … | … | … | … |
| Domain | TLD suffix | TLD | Domain type | Country by IP | PR value | Harmonic value | Domain creation date | Domain expiration date |
|---|---|---|---|---|---|---|---|---|
| tsuji.ac.jp | ac.jp | jp | ICANN | JP | 0.00000500412 | 17,787,198 | — | — |
| kyoto-u.ac.jp | ac.jp | jp | ICANN | US | 0.00000337243 | 17,879,620 | — | — |
| tohoku.ac.jp | ac.jp | jp | ICANN | JP | 0.0000021401 | 17,599,984 | — | — |
| umin.ac.jp | ac.jp | jp | ICANN | JP | 0.00000143627 | 17,265,538 | — | — |
| titech.ac.jp | ac.jp | jp | ICANN | JP | 0.00000131206 | 17,866,198 | — | — |
| … | … | … | … | … | … | … | … | … |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tsuji.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 164.46.39.54 | JP | {"tiktok":["https://tiktok.com/@tsujicho"],"threads":["https://threads.net/@tsujicho"],"youtube":["https://youtube.com/user/tsujichopress"],"facebook":["https://facebook.com/tsujicho"],"instagram":["https://instagram.com/tsujicho"],"x-twitter":["https://twitter.com/tsujichopress"]} | 2026-07-08 | Slick, HTTP/2, jQuery, Dropbox, Favicon, Open Graph, Salesforce, TikTok Pixel, Microsoft 365, Facebook Pixel | 0.00000500412 | 17,787,198 | — | — |
| kyoto-u.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 151.101.130.132 | US | {"youtube":["https://youtube.com/channel/UC3ikR0k6iSoz7DcdRsXS2xA/videos"],"facebook":["https://ja-jp.facebook.com/Kyoto.Univ"],"instagram":["https://instagram.com/kyotouniversity.jp"],"x-twitter":["https://twitter.com/univkyoto"]} | 2026-05-17 | PHP, Nginx, Drupal 11, HTTP/3, jQuery, Varnish, Open Graph, Google Font API, Google Analytics, Google Workspace | 0.00000337243 | 17,879,620 | — | — |
| tohoku.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 130.34.11.111 | JP | {"youtube":["https://youtube.com/user/tohokuuniversitypr"],"facebook":["https://facebook.com/TohokuUniversityPR"],"linkedin":["https://linkedin.com/school/tohoku-univ"],"instagram":["https://instagram.com/tohoku_uni"],"x-twitter":["https://x.com/TohokuUniPR"]} | 2026-07-08 | jQuery, Favicon, Typekit, jsDelivr, Open Graph, Priority Hints, Google Font API, Google Analytics GA4, Google Workspace, Apache HTTP Server | 0.0000021401 | 17,599,984 | — | — |
| umin.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 130.69.92.10 | JP | {"x-twitter":["https://twitter.com/umin_announce"]} | 2026-07-09 | HSTS, Slick, HTTP/2, jQuery, Favicon, Twitter, Modernizr, Open Graph, DreamWeaver, ZURB Foundation | 0.00000143627 | 17,265,538 | — | — |
| titech.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 131.112.125.17 | JP | {"youtube":["https://youtube.com/@sciencetokyo_ja"],"facebook":["https://facebook.com/sciencetokyo.official.ja"],"linkedin":["https://linkedin.com/school/sciencetokyo"],"instagram":["https://instagram.com/sciencetokyo_ja"],"x-twitter":["https://x.com/sciencetokyo_ja"]} | 2026-07-08 | HSTS, HTTP/2, jQuery 3.4.1, Favicon, Open Graph, Google Analytics GA4, Apache HTTP Server, Google Site Verification | 0.00000131206 | 17,866,198 | — | — |
| … | … | … | … | … | … | … | … | … | … | … | … | … | … |
| Domain | TLD suffix | TLD | Domain type | DNS last data checked | DNS Status | DNS records |
|---|---|---|---|---|---|---|
| tsuji.ac.jp | ac.jp | jp | ICANN | 2026-06-29 | TRUE | {"A":["164.46.39.54"],"MX":[{"host":"tsuji-ac-jp.mail.protection.outlook.com","priority":0}],"NS":["01.dnsv.jp","02.dnsv.jp","03.dnsv.jp","04.dnsv.jp"],"SOA":{"mname":"01.dnsv.jp","retry":900,"rname":"hostmaster.dnsv.jp","expire":604800,"serial":1781769226,"minimum":300,"refresh":3600},"TXT":["MS=ms15058219","apple-domain-verification=gW4altRZ4mdAqTkg","dropbox-domain-verification=mqn933l7urre","v=spf1 include:_spf.google.com include:_spf.salesforce.com ip4:106.139.212.49 ip4:211.1.233.128 include:crmstyle.com include:digital-knowledge.sm.air.ne.jp include:spf.protection.outlook.com include:tsushin.tsuji.ac.jp ~all"]} |
| kyoto-u.ac.jp | ac.jp | jp | ICANN | 2026-07-10 | TRUE | {"A":["151.101.130.132","151.101.194.132","151.101.2.132","151.101.66.132"],"DS":[{"digest":"8543d38d7fb4deeae4d88276534d4cb1704d22ae77b8c0834c3c7f6c3d70ae24","key_tag":54071,"algorithm":8,"digest_type":2}],"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":["dns-x.sinet.ad.jp","ns1.kuins.kyoto-u.ac.jp","ns2.kuins.kyoto-u.ac.jp"],"SOA":{"mname":"ns1.kuins.kyoto-u.ac.jp","retry":900,"rname":"ns-admin.kuins.kyoto-u.ac.jp","expire":3600000,"serial":2026070601,"minimum":900,"refresh":3600},"TXT":["096E8117BF3F3C52587EF8D38072CB7E","google-site-verification=IfeAI0qvDlYyRmUs9TWnqRjbn73rY952nPsLW0SSRV0","google-site-verification=MaMCa3-JCgsWx1-BxIZody2XQRNxodRO8KaTN0jAYV4","v=spf1 include:_spf.iimc.kyoto-u.ac.jp ~all"],"DNSKEY":[{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAZGdZKearOGdRd2ex7d+4LW/9qKTHdzeMWYcyzxDW3MbG46iykAT918Ow6ofPB8JMKfpSxeIFv05z9fjKb6Bh79vgqo6GEpAjPUkiFHTP1AL5tND97mbc6qsVNSBz7T7uR0xWQdgHWw3WguUFIiYRxfv8TU/idmbfUrcJAK6JgzZ"},{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAZjfIKnAeapznwJRck+b3nnvLsPMT08VVLqjR6CPfOf3kK91UnUlT2hWnjNE7NE6y5qP00fwZOWAz0pl7eQ4MJPOG+NWDcmmKUZotkNxCxZSURI4VWPWiTYm2s9pdwFTIp28Cp//xavUwX/v4IwaH/Qvr+0QB9kuNtX3jdUKrALz"},{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAav9RPQI5e0OyvSKzeuzTXXvL/TZznp1O8ujCJgop/xJuF3oQ2S+wjU+qojNFC1Ty9lEXuzLFLJ+5W9v0TU64dB2b8291a0sh5zfIIwlZ83/kLodDO+w/62y6qDbXbQuxqw5GX69LnbBOfXMoqzxtEPVLRoROhuv9XYXXTVr8DOz"},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAd02vTk7Wgpg3+dL3tS4ikMPFETPq3dlZyYDEdOdsZ66BQp9Gatxq/oc/FhbJQGKJKR38f3oZp4PM/HbAWWQbqp7qXuRV5WmcofllMGssSnngr7UJTV6oM+pov1s+NYYkWtnigXZ5ycHMLN6/dgG6c0OXQsFBgMEOLvogcjDbj20wG2vALw6e8Muaf3Oq1bABuDiBvQGeSlfW8ykRsrv4EbLiIe6ZXDtAPXia1mL0q71Conz/yzq2FS0sHKt0wG0jogw3vKztTTpBVIcwLK+jIyGQpwaD6Il7msYmffmpTTVLycl6Q0I7zHYJFW9RdCoy7cf+wBaBlGlG75mvoqz/M8="}]} |
| tohoku.ac.jp | ac.jp | jp | ICANN | 2026-06-29 | TRUE | {"A":["130.34.11.111"],"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":["dns-x.sinet.ad.jp","ns1.tohoku.ac.jp","ns2.tohoku.ac.jp","ns4.tohoku.ac.jp"],"SOA":{"mname":"ns1.tohoku.ac.jp","retry":1800,"rname":"postmaster.tohoku.ac.jp","expire":2419200,"serial":2026060200,"minimum":1200,"refresh":3600},"TXT":["C8E9C1C6E32530A235EC4678581BF971","MS=F57F6D585ABC3948FCE12DD3A37737B914D77ABF","adobe-idp-site-verification=479f2f198c8f61d8af3fb4114324a2b7b8fbe76124576bc04ae429bd236ed145","google-site-verification=yDn9bqi4HP0IxDzINOPSAfHlhHT6-ExApZIeGXxIemg","v=spf1 include:_spf.google.com ~all"]} |
| umin.ac.jp | ac.jp | jp | ICANN | 2026-07-05 | TRUE | {"A":["130.69.92.10"],"MX":[{"host":"mailgw.umin.ac.jp","priority":10}],"NS":["db.umin.ac.jp","ilsa.umin.ac.jp"],"SOA":{"mname":"db.umin.ac.jp","retry":3600,"rname":"postmast-ctr.umin.ac.jp","expire":604800,"serial":2026040200,"minimum":86400,"refresh":10800},"TXT":["google-site-verification=xR7VNy0VZWXBo71NTMR4jKzU6U8Tcu3baafEzuCAsjc","v=spf1 +ip4:130.69.92.0/24 +ip4:130.69.94.0/24 ~all"]} |
| titech.ac.jp | ac.jp | jp | ICANN | 2026-06-29 | TRUE | {"A":["131.112.125.17"],"MX":[{"host":"filter.nap.gsic.titech.ac.jp","priority":10}],"NS":["ns.fujisawa.wide.ad.jp","titechns2-o.noc.titech.ac.jp","titechns2-s.noc.titech.ac.jp"],"SOA":{"mname":"ns1.noc.titech.ac.jp","retry":600,"rname":"noc-admin.noc.titech.ac.jp","expire":3600000,"serial":2026061901,"minimum":3600,"refresh":3600},"TXT":["google-site-verification=sEA5LrILIEApBN_TmrcwgzYpGxnjq6bV9lluZGkgTJE","v=spf1 include:_spf.m.titech.ac.jp ~all"]} |
| … | … | … | … | … | … | … |
| Domain | 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 |
|---|---|---|---|---|---|---|---|---|
| tsuji.ac.jp | 2026-07-08 | WHOIS | — | — | 2026-06-18 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] TSUJI.AC.JP\r\ng. [Organization] Tsuji Culinary Institute\r\nl. [Organization Type] educational corporation\r\nm. [Administrative Contact] NN85854JP\r\nn. [Technical Contact] NN76891JP\r\np. [Name Server] 01.dnsv.jp\r\np. [Name Server] 02.dnsv.jp\r\np. [Name Server] 03.dnsv.jp\r\np. [Name Server] 04.dnsv.jp\r\ns. [Signing Key] \r\n[State] Connected (2026/12/31)\r\n[Registered Date] 1995/12/25\r\n[Connected Date] 1996/03/05\r\n[Last Update] 2026/06/18 16:53:48 (JST)"} | Domain is active |
| kyoto-u.ac.jp | 2026-07-10 | WHOIS | — | — | 2026-05-21 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] KYOTO-U.AC.JP\r\ng. [Organization] Kyoto University\r\nl. [Organization Type] University\r\nm. [Administrative Contact] MN41916JP\r\nn. [Technical Contact] MN41916JP\r\np. [Name Server] ns1.kuins.kyoto-u.ac.jp\r\np. [Name Server] ns2.kuins.kyoto-u.ac.jp\r\np. [Name Server] dns-x.sinet.ad.jp\r\ns. [Signing Key] 54071 8 2 (\r\n 8543D38D7FB4DEEAE4D88276534D4CB1\r\n 704D22AE77B8C0834C3C7F6C3D70AE24 )\r\n[State] Connected (2027/03/31)\r\n[Registered Date] \r\n[Connected Date] 2012/01/20\r\n[Last Update] 2026/05/21 10:00:44 (JST)"} | Domain is active |
| tohoku.ac.jp | 2026-07-10 | WHOIS | — | — | 2026-04-01 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] TOHOKU.AC.JP\r\ng. [Organization] Tohoku University\r\nl. [Organization Type] University\r\nm. [Administrative Contact] NM22956JP\r\nn. [Technical Contact] NM22956JP\r\np. [Name Server] ns1.tohoku.ac.jp\r\np. [Name Server] ns2.tohoku.ac.jp\r\np. [Name Server] ns4.tohoku.ac.jp\r\np. [Name Server] dns-x.sinet.ad.jp\r\ns. [Signing Key] \r\n[State] Connected (2027/03/31)\r\n[Registered Date] \r\n[Connected Date] 2012/01/19\r\n[Last Update] 2026/04/01 01:00:51 (JST)"} | Domain is active |
| umin.ac.jp | 2026-07-12 | WHOIS | — | — | 2025-08-01 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] UMIN.AC.JP\r\ng. [Organization] University Hospital Medical Information Network\r\nl. [Organization Type] AC\r\nm. [Administrative Contact] TK4944JP\r\nn. [Technical Contact] TK566JP\r\np. [Name Server] db.umin.ac.jp\r\np. [Name Server] ilsa.umin.ac.jp\r\ns. [Signing Key] \r\n[State] Connected (2026/07/31)\r\n[Registered Date] 1996/07/30\r\n[Connected Date] 1997/04/08\r\n[Last Update] 2025/08/01 01:03:26 (JST)"} | Domain is active |
| titech.ac.jp | 2026-07-10 | WHOIS | — | — | 2026-04-01 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] TITECH.AC.JP\r\ng. [Organization] Institute of Science Tokyo\r\nl. [Organization Type] University\r\nm. [Administrative Contact] YK87359JP\r\nn. [Technical Contact] YS79730JP\r\np. [Name Server] ns.fujisawa.wide.ad.jp\r\np. [Name Server] titechns2-o.noc.titech.ac.jp\r\np. [Name Server] titechns2-s.noc.titech.ac.jp\r\ns. [Signing Key] \r\n[State] Connected (2027/03/31)\r\n[Registered Date] \r\n[Connected Date] 2025/05/26\r\n[Last Update] 2026/04/01 01:01:40 (JST)"} | Domain is active |
| … | … | … | … | … | … | … | … | … |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tsuji.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 164.46.39.54 | JP | {"tiktok":["https://tiktok.com/@tsujicho"],"threads":["https://threads.net/@tsujicho"],"youtube":["https://youtube.com/user/tsujichopress"],"facebook":["https://facebook.com/tsujicho"],"instagram":["https://instagram.com/tsujicho"],"x-twitter":["https://twitter.com/tsujichopress"]} | 2026-07-08 | Slick, HTTP/2, jQuery, Dropbox, Favicon, Open Graph, Salesforce, TikTok Pixel, Microsoft 365, Facebook Pixel | 2026-06-29 | TRUE | {"A":["164.46.39.54"],"MX":[{"host":"tsuji-ac-jp.mail.protection.outlook.com","priority":0}],"NS":["01.dnsv.jp","02.dnsv.jp","03.dnsv.jp","04.dnsv.jp"],"SOA":{"mname":"01.dnsv.jp","retry":900,"rname":"hostmaster.dnsv.jp","expire":604800,"serial":1781769226,"minimum":300,"refresh":3600},"TXT":["MS=ms15058219","apple-domain-verification=gW4altRZ4mdAqTkg","dropbox-domain-verification=mqn933l7urre","v=spf1 include:_spf.google.com include:_spf.salesforce.com ip4:106.139.212.49 ip4:211.1.233.128 include:crmstyle.com include:digital-knowledge.sm.air.ne.jp include:spf.protection.outlook.com include:tsushin.tsuji.ac.jp ~all"]} | 0.00000500412 | 17,787,198 | 2026-07-08 | WHOIS | — | — | 2026-06-18 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] TSUJI.AC.JP\r\ng. [Organization] Tsuji Culinary Institute\r\nl. [Organization Type] educational corporation\r\nm. [Administrative Contact] NN85854JP\r\nn. [Technical Contact] NN76891JP\r\np. [Name Server] 01.dnsv.jp\r\np. [Name Server] 02.dnsv.jp\r\np. [Name Server] 03.dnsv.jp\r\np. [Name Server] 04.dnsv.jp\r\ns. [Signing Key] \r\n[State] Connected (2026/12/31)\r\n[Registered Date] 1995/12/25\r\n[Connected Date] 1996/03/05\r\n[Last Update] 2026/06/18 16:53:48 (JST)"} | Domain is active |
| kyoto-u.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 151.101.130.132 | US | {"youtube":["https://youtube.com/channel/UC3ikR0k6iSoz7DcdRsXS2xA/videos"],"facebook":["https://ja-jp.facebook.com/Kyoto.Univ"],"instagram":["https://instagram.com/kyotouniversity.jp"],"x-twitter":["https://twitter.com/univkyoto"]} | 2026-05-17 | PHP, Nginx, Drupal 11, HTTP/3, jQuery, Varnish, Open Graph, Google Font API, Google Analytics, Google Workspace | 2026-07-10 | TRUE | {"A":["151.101.130.132","151.101.194.132","151.101.2.132","151.101.66.132"],"DS":[{"digest":"8543d38d7fb4deeae4d88276534d4cb1704d22ae77b8c0834c3c7f6c3d70ae24","key_tag":54071,"algorithm":8,"digest_type":2}],"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":["dns-x.sinet.ad.jp","ns1.kuins.kyoto-u.ac.jp","ns2.kuins.kyoto-u.ac.jp"],"SOA":{"mname":"ns1.kuins.kyoto-u.ac.jp","retry":900,"rname":"ns-admin.kuins.kyoto-u.ac.jp","expire":3600000,"serial":2026070601,"minimum":900,"refresh":3600},"TXT":["096E8117BF3F3C52587EF8D38072CB7E","google-site-verification=IfeAI0qvDlYyRmUs9TWnqRjbn73rY952nPsLW0SSRV0","google-site-verification=MaMCa3-JCgsWx1-BxIZody2XQRNxodRO8KaTN0jAYV4","v=spf1 include:_spf.iimc.kyoto-u.ac.jp ~all"],"DNSKEY":[{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAZGdZKearOGdRd2ex7d+4LW/9qKTHdzeMWYcyzxDW3MbG46iykAT918Ow6ofPB8JMKfpSxeIFv05z9fjKb6Bh79vgqo6GEpAjPUkiFHTP1AL5tND97mbc6qsVNSBz7T7uR0xWQdgHWw3WguUFIiYRxfv8TU/idmbfUrcJAK6JgzZ"},{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAZjfIKnAeapznwJRck+b3nnvLsPMT08VVLqjR6CPfOf3kK91UnUlT2hWnjNE7NE6y5qP00fwZOWAz0pl7eQ4MJPOG+NWDcmmKUZotkNxCxZSURI4VWPWiTYm2s9pdwFTIp28Cp//xavUwX/v4IwaH/Qvr+0QB9kuNtX3jdUKrALz"},{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAav9RPQI5e0OyvSKzeuzTXXvL/TZznp1O8ujCJgop/xJuF3oQ2S+wjU+qojNFC1Ty9lEXuzLFLJ+5W9v0TU64dB2b8291a0sh5zfIIwlZ83/kLodDO+w/62y6qDbXbQuxqw5GX69LnbBOfXMoqzxtEPVLRoROhuv9XYXXTVr8DOz"},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAd02vTk7Wgpg3+dL3tS4ikMPFETPq3dlZyYDEdOdsZ66BQp9Gatxq/oc/FhbJQGKJKR38f3oZp4PM/HbAWWQbqp7qXuRV5WmcofllMGssSnngr7UJTV6oM+pov1s+NYYkWtnigXZ5ycHMLN6/dgG6c0OXQsFBgMEOLvogcjDbj20wG2vALw6e8Muaf3Oq1bABuDiBvQGeSlfW8ykRsrv4EbLiIe6ZXDtAPXia1mL0q71Conz/yzq2FS0sHKt0wG0jogw3vKztTTpBVIcwLK+jIyGQpwaD6Il7msYmffmpTTVLycl6Q0I7zHYJFW9RdCoy7cf+wBaBlGlG75mvoqz/M8="}]} | 0.00000337243 | 17,879,620 | 2026-07-10 | WHOIS | — | — | 2026-05-21 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] KYOTO-U.AC.JP\r\ng. [Organization] Kyoto University\r\nl. [Organization Type] University\r\nm. [Administrative Contact] MN41916JP\r\nn. [Technical Contact] MN41916JP\r\np. [Name Server] ns1.kuins.kyoto-u.ac.jp\r\np. [Name Server] ns2.kuins.kyoto-u.ac.jp\r\np. [Name Server] dns-x.sinet.ad.jp\r\ns. [Signing Key] 54071 8 2 (\r\n 8543D38D7FB4DEEAE4D88276534D4CB1\r\n 704D22AE77B8C0834C3C7F6C3D70AE24 )\r\n[State] Connected (2027/03/31)\r\n[Registered Date] \r\n[Connected Date] 2012/01/20\r\n[Last Update] 2026/05/21 10:00:44 (JST)"} | Domain is active |
| tohoku.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 130.34.11.111 | JP | {"youtube":["https://youtube.com/user/tohokuuniversitypr"],"facebook":["https://facebook.com/TohokuUniversityPR"],"linkedin":["https://linkedin.com/school/tohoku-univ"],"instagram":["https://instagram.com/tohoku_uni"],"x-twitter":["https://x.com/TohokuUniPR"]} | 2026-07-08 | jQuery, Favicon, Typekit, jsDelivr, Open Graph, Priority Hints, Google Font API, Google Analytics GA4, Google Workspace, Apache HTTP Server | 2026-06-29 | TRUE | {"A":["130.34.11.111"],"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":["dns-x.sinet.ad.jp","ns1.tohoku.ac.jp","ns2.tohoku.ac.jp","ns4.tohoku.ac.jp"],"SOA":{"mname":"ns1.tohoku.ac.jp","retry":1800,"rname":"postmaster.tohoku.ac.jp","expire":2419200,"serial":2026060200,"minimum":1200,"refresh":3600},"TXT":["C8E9C1C6E32530A235EC4678581BF971","MS=F57F6D585ABC3948FCE12DD3A37737B914D77ABF","adobe-idp-site-verification=479f2f198c8f61d8af3fb4114324a2b7b8fbe76124576bc04ae429bd236ed145","google-site-verification=yDn9bqi4HP0IxDzINOPSAfHlhHT6-ExApZIeGXxIemg","v=spf1 include:_spf.google.com ~all"]} | 0.0000021401 | 17,599,984 | 2026-07-10 | WHOIS | — | — | 2026-04-01 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] TOHOKU.AC.JP\r\ng. [Organization] Tohoku University\r\nl. [Organization Type] University\r\nm. [Administrative Contact] NM22956JP\r\nn. [Technical Contact] NM22956JP\r\np. [Name Server] ns1.tohoku.ac.jp\r\np. [Name Server] ns2.tohoku.ac.jp\r\np. [Name Server] ns4.tohoku.ac.jp\r\np. [Name Server] dns-x.sinet.ad.jp\r\ns. [Signing Key] \r\n[State] Connected (2027/03/31)\r\n[Registered Date] \r\n[Connected Date] 2012/01/19\r\n[Last Update] 2026/04/01 01:00:51 (JST)"} | Domain is active |
| umin.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 130.69.92.10 | JP | {"x-twitter":["https://twitter.com/umin_announce"]} | 2026-07-09 | HSTS, Slick, HTTP/2, jQuery, Favicon, Twitter, Modernizr, Open Graph, DreamWeaver, ZURB Foundation | 2026-07-05 | TRUE | {"A":["130.69.92.10"],"MX":[{"host":"mailgw.umin.ac.jp","priority":10}],"NS":["db.umin.ac.jp","ilsa.umin.ac.jp"],"SOA":{"mname":"db.umin.ac.jp","retry":3600,"rname":"postmast-ctr.umin.ac.jp","expire":604800,"serial":2026040200,"minimum":86400,"refresh":10800},"TXT":["google-site-verification=xR7VNy0VZWXBo71NTMR4jKzU6U8Tcu3baafEzuCAsjc","v=spf1 +ip4:130.69.92.0/24 +ip4:130.69.94.0/24 ~all"]} | 0.00000143627 | 17,265,538 | 2026-07-12 | WHOIS | — | — | 2025-08-01 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] UMIN.AC.JP\r\ng. [Organization] University Hospital Medical Information Network\r\nl. [Organization Type] AC\r\nm. [Administrative Contact] TK4944JP\r\nn. [Technical Contact] TK566JP\r\np. [Name Server] db.umin.ac.jp\r\np. [Name Server] ilsa.umin.ac.jp\r\ns. [Signing Key] \r\n[State] Connected (2026/07/31)\r\n[Registered Date] 1996/07/30\r\n[Connected Date] 1997/04/08\r\n[Last Update] 2025/08/01 01:03:26 (JST)"} | Domain is active |
| titech.ac.jp | ac.jp | jp | ICANN | HTTP 200 | 131.112.125.17 | JP | {"youtube":["https://youtube.com/@sciencetokyo_ja"],"facebook":["https://facebook.com/sciencetokyo.official.ja"],"linkedin":["https://linkedin.com/school/sciencetokyo"],"instagram":["https://instagram.com/sciencetokyo_ja"],"x-twitter":["https://x.com/sciencetokyo_ja"]} | 2026-07-08 | HSTS, HTTP/2, jQuery 3.4.1, Favicon, Open Graph, Google Analytics GA4, Apache HTTP Server, Google Site Verification | 2026-06-29 | TRUE | {"A":["131.112.125.17"],"MX":[{"host":"filter.nap.gsic.titech.ac.jp","priority":10}],"NS":["ns.fujisawa.wide.ad.jp","titechns2-o.noc.titech.ac.jp","titechns2-s.noc.titech.ac.jp"],"SOA":{"mname":"ns1.noc.titech.ac.jp","retry":600,"rname":"noc-admin.noc.titech.ac.jp","expire":3600000,"serial":2026061901,"minimum":3600,"refresh":3600},"TXT":["google-site-verification=sEA5LrILIEApBN_TmrcwgzYpGxnjq6bV9lluZGkgTJE","v=spf1 include:_spf.m.titech.ac.jp ~all"]} | 0.00000131206 | 17,866,198 | 2026-07-10 | WHOIS | — | — | 2026-04-01 | — | {"raw_response":"[ JPRS database provides information on network administration. Its use is ]\r\n[ restricted to network administration purposes. For further information, ]\r\n[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]\r\n[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]\r\nDomain Information:\r\na. [Domain Name] TITECH.AC.JP\r\ng. [Organization] Institute of Science Tokyo\r\nl. [Organization Type] University\r\nm. [Administrative Contact] YK87359JP\r\nn. [Technical Contact] YS79730JP\r\np. [Name Server] ns.fujisawa.wide.ad.jp\r\np. [Name Server] titechns2-o.noc.titech.ac.jp\r\np. [Name Server] titechns2-s.noc.titech.ac.jp\r\ns. [Signing Key] \r\n[State] Connected (2027/03/31)\r\n[Registered Date] \r\n[Connected Date] 2025/05/26\r\n[Last Update] 2026/04/01 01:01:40 (JST)"} | Domain is active |
| … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … |
Showing 5 of 3,691 rows · All active domains · Every live domain with its TLD and domain type.
Top technologies on .ac.jp
| Technology | Sites | Share |
|---|---|---|
| jQuery | 2K | 74.5% |
| Google Analytics | 2K | 66.9% |
| Open Graph | 2K | 58.8% |
| PHP | 2K | 53.5% |
| Nginx | 1K | 47.9% |
Top countries on .ac.jp
| Country | Sites | Share |
|---|---|---|
| 🇯🇵 Japan | 3K | 95.3% |
| 🇺🇸 United States | 133 | 4.6% |
| 🇩🇪 Germany | 3 | 0.1% |
| 🇫🇷 France | 1 | 0.0% |
| 🇨🇦 Canada | 1 | 0.0% |
The .ac.jp dataset
Everything we have on 3,691 .ac.jp domains in one downloadable file — fresh export every day. Same columns and cadence as any top-level TLD.
Buy a dataset to download .ac.jp
The full .ac.jp slice (15.4 KB JSONL, fresh daily exports) lives inside each dataset. Get one from €29 to €599 per month and download immediately.
How to download the .ac.jp domain list
The complete .ac.jp domain list is available as one structured file. Every entry in the list is a single registered domain exported with its full record, so you can work it all offline instead of crawling it yourself.
Pick the dataset that fits your use case, then download the .ac.jp list in JSONL (zstd-compressed) — the very same list that powers our API. A free sample of the list is available before you pay, and you can re-download the latest export any time during your access month.
Each .ac.jp list includes, for every domain:
- DNS, RDAP and WHOIS records — registrar and dates across the full list.
- Detected technologies for each site in the list.
- Hosting IP, country and PageRank / Harmonic ranking.
- A daily-refreshed export, so the list you receive is never stale.
Frequently asked questions
How many .ac.jp domains are there?
webatla tracks 4K active .ac.jp domains, re-exported every day — each with its DNS, RDAP/WHOIS, detected technologies, IP, hosting country and ranking.
Can I download the full list of .ac.jp domains?
Yes, the full .ac.jp list downloads as structured JSONL (zstd). A free sample is available first.
What's included for each domain, and how fresh is it?
Every domain carries the full schema — DNS, RDAP/WHOIS, technologies, IP & country, PageRank and Harmonic — re-exported daily.
How do I download the .ac.jp domain list?
Choose a dataset, and the full .ac.jp list is then yours as a single JSONL file in your account. You can re-download the list anytime during your access month, and a free sample is available to download first.
What format is the .ac.jp list in?
The list is yours to download as JSONL compressed with zstd, one domain per line, ready to load straight into any database or script. The exact same list is also reachable through our API.
Can I download just the .ac.jp domains, or the whole database?
Both. Each dataset is a single downloadable file, buy just the one you need for .ac.jp. Or buy All data for the entire database: every dataset combined (identity, ranking, technologies, DNS and RDAP/WHOIS) in one file. Daily fresh export.
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