.arpa
Download .arpa domains
227 active domains
Generic top-level domain · Operated by IANA · Established 1985
gTLD
Dataset updated · 2026-07-15
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About .arpa
.arpa is one of the oldest and most technically important top-level domains on the internet, originally created as part of the ARPANET infrastructure in 1985. Managed exclusively by IANA (Internet Assigned Numbers Authority) on behalf of the Internet Architecture Board (IAB), .arpa is an infrastructure TLD not available for public registration. Its primary use is for technical internet functions, including reverse DNS lookups (in-addr.arpa for IPv4 and ip6.arpa for IPv6), which allow IP addresses to be mapped back to domain names.
The .arpa TLD's name derives from the Advanced Research Projects Agency (ARPA), the U.S. government agency that funded the development of the internet's precursor. Today, .arpa underpins critical internet routing and addressing functions, and its subdomains are essential to the correct operation of email, web browsing, and network diagnostics. Despite its low public profile, .arpa is one of the most queried TLDs in the DNS system, as reverse DNS lookups occur constantly across the global internet infrastructure.
At a glance
TypeGeneric (gTLD)
RegistryIANA
Established1985
IDN supportNo
DNSSECYes
New domain registrations
—
last week
—
last month
Active domains227
registered in this zone
Active websites1
resolved successfully in the last export
DNS227
domains with DNS records
Countries0
countries represented (by hosting IP)
RDAP & WHOIS227
domains with RDAP & WHOIS records
Database preview of .arpa 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-arpa-all-2026-07-15.jsonl.zst · 227 rows · 1.0 KB · 22 columns
Daily fresh export
| Domain | TLD | Domain type |
|---|---|---|
| ip6.arpa | arpa | ICANN |
| in-addr.arpa | arpa | ICANN |
| lex.urn.arpa | arpa | ICANN |
| 203.in-addr.arpa | arpa | ICANN |
| 195.in-addr.arpa | arpa | ICANN |
| … | … | … |
| Domain | TLD | Domain type | Country by IP | PR value | Harmonic value | Domain creation date | Domain expiration date |
|---|---|---|---|---|---|---|---|
| ip6.arpa | arpa | ICANN | — | 0.0000000929311 | 13,636,105 | 2001-11-10 | — |
| in-addr.arpa | arpa | ICANN | — | 0.0000000504849 | 13,658,324 | 1994-09-27 | — |
| lex.urn.arpa | arpa | ICANN | — | 0.0000000368899 | 13,813,906 | 2002-10-01 | — |
| 203.in-addr.arpa | arpa | ICANN | — | 0.0000000368898 | 13,813,836 | — | — |
| 195.in-addr.arpa | arpa | ICANN | — | 0.0000000304479 | 12,491,975 | — | — |
| … | … | … | … | … | … | … | … |
| Domain | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ip6.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-05-15 | — | 0.0000000929311 | 13,636,105 | 2001-11-10 | — |
| in-addr.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-05-14 | — | 0.0000000504849 | 13,658,324 | 1994-09-27 | — |
| lex.urn.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-05-18 | — | 0.0000000368899 | 13,813,906 | 2002-10-01 | — |
| 203.in-addr.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-04-21 | — | 0.0000000368898 | 13,813,836 | — | — |
| 195.in-addr.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-04-21 | — | 0.0000000304479 | 12,491,975 | — | — |
| … | … | … | … | … | … | … | … | … | … | … | … | … |
| Domain | TLD | Domain type | DNS last data checked | DNS Status | DNS records |
|---|---|---|---|---|---|
| ip6.arpa | arpa | ICANN | 2026-07-11 | TRUE | {"DS":[{"digest":"068554efcb5861f42af93ef8e79c442a86c16fc5652e6b6d2419ed527f344d17","key_tag":13880,"algorithm":8,"digest_type":2},{"digest":"8a11501086330132be2c23f22dedf0634ad5ff668b4aa1988e172c6a2a4e5f7b","key_tag":64060,"algorithm":8,"digest_type":2},{"digest":"e6b54e0a20ce1edbfcb6879c02f5782059cecb043a31d804a04afa51af01d5fb","key_tag":45094,"algorithm":8,"digest_type":2}],"NS":["a.ip6-servers.arpa","b.ip6-servers.arpa","c.ip6-servers.arpa","d.ip6-servers.arpa","e.ip6-servers.arpa","f.ip6-servers.arpa"],"SOA":{"mname":"b.ip6-servers.arpa","retry":900,"rname":"nstld.iana.org","expire":604800,"serial":2026022515,"minimum":3600,"refresh":1800},"DNSKEY":[{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAZuV3D47mDLqI7GZY30GPX+O3kpT8s6k+Q2Iz9/mF5ua+XbncDI6VLDsnw4/r8lj3XC2LUhX/Pt4FdwzPonYf0bZAFShq2n7Sftb4oBOjX6Pel8PKYp6RkWjy4Wo351uBQxBOq+XkbYOeh46dJ9sk8iHBJFu35UP4OSBNm+0qWeB"},{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAdiTygbxKgCYFKx/ByKiFegRN+6Dkh2PiQwiDMsE1SaGOratXd5eZRXqQiqn8J9tnhFAxap2KmZ7pCTbdy3Xq1/nOMLpDgF5W8HWNMcWSClf0zfHty1DxPmawBk0mj3L3TgO6wIzxOuZxCchvOjkE9hy2xxUGmP8jQQogocy0mLj"},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAa8bJ22d6oorQjwmAivlT8diruwB75t3hz7G/FHOgFxTKnbRzkCtFItnxaBvD+lygqsj38amSqwsLYnNvejL/9kSzMdntRc5fC+9E+0m9Wq+liYSm60IxKvSL0fzApA80UgD1rpRtelBrkyiJyj3byiRcEDJhRXPmyQOqNDnVpq3tTDPlkwEAF7uAmp3qKRZWJF6VswoAFqya7pMiCt8M+No+xiWZro87ZqTwRUBMJWKafO5ONH+HoZDvDeP+CNsKyt5GTROX+UxxT8xSueJidceJsKaI75HvEOp0kLAr8TPSvg4eBkk5Pgn+LvNBQ3ZdPMfHIKSLbZ+J3OOJJIkgpk="},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAb+iy1CqMSS2fAoZhqeG0b1MxbegsUt94GIYCOe4PRQYiyVZb0Wi3s2RpSNoC1XNz1ne1CYAq2B0/XCwXzBVBppG4zJ6Hr4LAoXBRmlLSmNlbqbNJ8WCy0y5c6CNMKGRfd9KPzko1MO1wLbTRFiFDjE2h602c3K1qawngVcbRLMNnttAWJU2q+8BzdN26YeDdpsSFdPI+CbifItfwFfJx8BOIQkcOJX8gjFxs9bvGuXTaf7qLzyNFklZG7NY63ooOdVYV9UoZH0bcdVSRg4a/Ilqryvb9eBeihkWs1+h57ppQGcR61ryfQqGc+19hSvO9DM1+X2g9uFzdxs3zg5e3n8="}]} |
| in-addr.arpa | arpa | ICANN | 2026-07-11 | TRUE | {"DS":[{"digest":"13e5501c56b20394da921b51412d48b7089c5eb6957a7c58553c4d4d424f04df","key_tag":53696,"algorithm":8,"digest_type":2},{"digest":"5cafccec201d1933b4c9f6a9c8f51e51f3b39979058ac21b8df1b1f281cbc6f2","key_tag":47054,"algorithm":8,"digest_type":2},{"digest":"aaf4fb5d213ef25ae44679032ebe3514c487d7abd99d7f5fec3383d030733c73","key_tag":63982,"algorithm":8,"digest_type":2},{"digest":"e0e2bf5cfbd66572ca05ec18267d91509ba6a9405af05c3fd4141dfa45200c08","key_tag":54956,"algorithm":8,"digest_type":2}],"NS":["a.in-addr-servers.arpa","b.in-addr-servers.arpa","c.in-addr-servers.arpa","d.in-addr-servers.arpa","e.in-addr-servers.arpa","f.in-addr-servers.arpa"],"SOA":{"mname":"b.in-addr-servers.arpa","retry":900,"rname":"nstld.iana.org","expire":604800,"serial":2026023083,"minimum":3600,"refresh":1800},"DNSKEY":[{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAaU/BBSt6weqX35dhPyUe0XlQMTNU7Skvf+WZztcDbsexjixVP5y+3QryKV4BLgApUIAs14y9Vp/75ibHh0sfvDpzUz/QqJ+nywiRN3Sg42Wlg/tCbUFBZ2fDKOhfC69Lxv+OfOZkGSH/CaxXNjrfjldqBXRyoMSlFIl0ecYO33b"},{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAaz/5oy0pjvJ1+8Nfq0Vu/MmNBUOn8XZ5aoobVz1CRE6bImJFmgMPG5Zpuk7AqPUxrVJn3dY2FEvHTJum9grYxy+xWv2nGmPMTq8c5JbyooZ3P3x0KpWpRCRXFlJJQJyd+EWAVpXPab2+4I3pA4wvoTUe1jn8OD2F3cJANmalsNl"},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAbNX16PjL99cu7CpO7Nt5EXoq8k6TCZpzxz13wCITdkwIce4UrzUqw7b76WH7N3KKAb4uJgmswkujk+gYMqnMAwNBFELrCDDkflw2AIjFPXBd2Txw8o3H5of2uIbAijm76B562VIiT3p0RIP1SH4eA+wHwYmqM3o/PiYfCxQD1c+EJx6b6dRcKAfeX4XMSsM6DyI6tjLGZ//w/IspRnbRb6Q36zWNyPPY2+5fqkaJ/94OKapvXTCUpWsNqKYlOxMwovwW9a2uBIgldzSq9mCtGUXU7mRZkwUIpnzA5Qe+lYdimWnzve7BXVs8ZZUyNhlDMlWYUrYHiaJ0uESYAWZQ98="},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAbdOaEhLDa/H2m+hbXBHiAUE95PgpL2358lkJCBmb2Dn7aImc5sqoaEa48hlabMuG2PfnbWd3ttpVXX6mwLRMppyhJeBbr1q2YWtzi+Xx5modXLKSDPuLliLUQ1oPnq2QWK7BUNwmV70gQSOx78vkisDqFzocC2aiFAi+D2r45GPvtBMbjfCA1FB0SELeUCsxhgoAHphO5T6ITCrOccM7XX7A4qRbcbS65HOcbT+UDG9OoXjmw2j8mWgJXrpwvdsskaISrTivzcqadgOinSgAL3bVYFKCkiVBmx87d88v+OuK+358xsUIU+0MzXUidLS8086BpdiEW4cJ6c08oDyC10="}]} |
| lex.urn.arpa | arpa | ICANN | 2026-07-02 | TRUE | {"NAPTR":[{"flags":"","order":100,"regexp":"","service":"","preference":10,"replacement":"lex-nameserver.nic.it"}]} |
| 203.in-addr.arpa | arpa | ICANN | 2026-07-10 | TRUE | {"DS":[{"digest":"31f1bfc2f95fbeb1cea109d86641f6f533ac143f873e58b3266ebe69d817945c","key_tag":62187,"algorithm":13,"digest_type":2}],"NS":["apnic.authdns.ripe.net","ns1.apnic.net","ns2.apnic.net","ns3.lacnic.net","rirns.arin.net"],"SOA":{"mname":"ns.apnic.net","retry":1800,"rname":"read-txt-record-of-zone-first-dns-admin.apnic.net","expire":604800,"serial":3006153214,"minimum":3600,"refresh":7200},"TXT":["'203/8 zone'"],"DNSKEY":[{"flags":256,"protocol":3,"algorithm":13,"public_key":"tYyoBTfwYu8E9MzCUQ/NpH9E745A7borclcuT2LcG93QFiwAWzXC+8gTB8KTC159SdkKWsBHw9ZZ0qWMhWWGhw=="},{"flags":257,"protocol":3,"algorithm":13,"public_key":"4H3UQtxJd+rqlNeGwNHy27oAdMU1d27RrSvNBM9E8Sr1q/9bTUA3xNTyPOPWyIICWeVbHv0HBRQgSpq+z0w8TQ=="}]} |
| 195.in-addr.arpa | arpa | ICANN | 2026-07-06 | TRUE | {"DS":[{"digest":"cbb1f07734a7c632f37c3729d0f0654e747be2abe1f8242ed93e13bc879ca740","key_tag":59166,"algorithm":13,"digest_type":2}],"NS":["ns3.afrinic.net","ns3.lacnic.net","ns4.apnic.net","pri.authdns.ripe.net","rirns.arin.net"],"SOA":{"mname":"pri.authdns.ripe.net","retry":600,"rname":"dns.ripe.net","expire":864000,"serial":1783289456,"minimum":3600,"refresh":3600},"DNSKEY":[{"flags":257,"protocol":3,"algorithm":13,"public_key":"DjH9KxyFdUypfwA0eZKTWVSDff0nhUs2pwknXUBHKYAWo6B4l5brn/xrUp9ZZvk2xFV7AdULTEDIgOoV24RHHg=="}]} |
| … | … | … | … | … | … |
| 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 |
|---|---|---|---|---|---|---|---|---|
| ip6.arpa | 2026-07-07 | WHOIS | 2001-11-10 | — | 2025-07-10 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: IP6.ARPA\n\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington Delaware 19801\naddress: United States\n\ncontact: administrative\nname: Internet Architecture Board (IAB)\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington DE 19801\naddress: United States\nphone: +1 510 492 4080\nfax-no: +1 510 492 4001\ne-mail: iab@iab.org\n\ncontact: technical\nname: Internet Assigned Numbers Authority (IANA)\norganisation: Internet Corporation for Assigned Names and Numbers (ICANN)\naddress: 12025 Waterfront Drive\naddress: Suite 300\naddress: Los Angeles CA 90094\naddress: United States\nphone: +1 310 301 5800\nfax-no: +1 310 823 8649\ne-mail: tld-contact@iana.org\n\nnserver: A.IP6-SERVERS.ARPA 199.180.182.53 2620:37:e000::53\nnserver: B.IP6-SERVERS.ARPA 199.253.182.182 2001:500:86::86\nnserver: C.IP6-SERVERS.ARPA 196.216.169.11 2001:43f8:110::11\nnserver: D.IP6-SERVERS.ARPA 200.7.86.53 2001:13c7:7012::53\nnserver: E.IP6-SERVERS.ARPA 2001:dd8:6::101 203.119.86.101\nnserver: F.IP6-SERVERS.ARPA 193.0.9.2 2a13:27c0:30::2\nds-rdata: 13880 8 2 068554EFCB5861F42AF93EF8E79C442A86C16FC5652E6B6D2419ED527F344D17\nds-rdata: 45094 8 2 E6B54E0A20CE1EDBFCB6879C02F5782059CECB043A31D804A04AFA51AF01D5FB\nds-rdata: 64060 8 2 8A11501086330132BE2C23F22DEDF0634AD5FF668B4AA1988E172C6A2A4E5F7B\n\nremarks: This domain is administered as part of the .ARPA zone\nremarks: management, described at https://iana.org/domains/arpa\n\ncreated: 2001-11-10\nchanged: 2025-07-10\nsource: IANA"} | Domain is active |
| in-addr.arpa | 2026-07-12 | WHOIS | 1994-09-27 | — | 2025-07-10 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: IN-ADDR.ARPA\n\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington Delaware 19801\naddress: United States\n\ncontact: administrative\nname: Internet Architecture Board (IAB)\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington Delaware 19801\naddress: United States\nphone: +1 510 492 4080\nfax-no: +1 510 492 4001\ne-mail: iab@iab.org\n\ncontact: technical\nname: Internet Assigned Numbers Authority (IANA)\norganisation: Internet Corporation for Assigned Names and Numbers (ICANN)\naddress: 12025 Waterfront Drive\naddress: Suite 300\naddress: Los Angeles California 90094\naddress: US\nphone: +1 310 301 5800\nfax-no: +1 310 823 8649\ne-mail: tld-contact@iana.org\n\nnserver: A.IN-ADDR-SERVERS.ARPA 199.180.182.53 2620:37:e000::53\nnserver: B.IN-ADDR-SERVERS.ARPA 199.253.183.183 2001:500:87:0:0:0:0:87\nnserver: C.IN-ADDR-SERVERS.ARPA 196.216.169.10 2001:43f8:110::10\nnserver: D.IN-ADDR-SERVERS.ARPA 200.10.60.53 2001:13c7:7010::53\nnserver: E.IN-ADDR-SERVERS.ARPA 2001:dd8:6::101 203.119.86.101\nnserver: F.IN-ADDR-SERVERS.ARPA 193.0.9.1 2a13:27c0:30::1\nds-rdata: 53696 8 2 13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D424F04DF\nds-rdata: 47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2\nds-rdata: 63982 8 2 AAF4FB5D213EF25AE44679032EBE3514C487D7ABD99D7F5FEC3383D030733C73\nds-rdata: 54956 8 2 E0E2BF5CFBD66572CA05EC18267D91509BA6A9405AF05C3FD4141DFA45200C08\n\nremarks: This domain is administered as part of the .ARPA zone\nremarks: management, described at https://iana.org/domains/arpa\n\ncreated: 1994-09-27\nchanged: 2025-07-10\nsource: IANA"} | Domain is active |
| lex.urn.arpa | 2026-07-08 | WHOIS | 2002-10-01 | — | 2026-05-22 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: URN.ARPA\n\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington DE 19801\naddress: United States\n\ncontact: administrative\nname: Internet Architecture Board (IAB)\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington DE 19801\naddress: United States\nphone: +1 510 492 4080\nfax-no: +1 510 492 4001\ne-mail: iab@iab.org\n\ncontact: technical\nname: Internet Assigned Numbers Authority (IANA)\norganisation: Internet Corporation for Assigned Names and Numbers (ICANN)\naddress: 12025 Waterfront Drive\naddress: Suite 300\naddress: Los Angeles CA 90094\naddress: United States\nphone: +1 310 301 5800\nfax-no: +1 310 823 8649\ne-mail: tld-contact@iana.org\n\nnserver: A.IANA-SERVERS.NET\nnserver: B.IANA-SERVERS.NET\nnserver: C.IANA-SERVERS.NET\nnserver: NS3.LACNIC.NET\nnserver: NS4.APNIC.NET\nds-rdata: 45052 8 2 7685B675F93ADA412CFE534820C8DCC55654B1711F677BA83A8564C12943F695\nds-rdata: 28996 8 2 8E66D01A1E5864BCDB8E1F85579AEC7C8C536C9D6FC7032EE708E869FD27F3D3\nds-rdata: 34555 8 2 BD743967DEF1CAF0812FE9EFF2371D3ADF29E27251DB272145A5D523C92F7101\n\nremarks: This domain is administered as part of the .ARPA zone\nremarks: management, described at https://iana.org/domains/arpa\n\ncreated: 2002-10-01\nchanged: 2026-05-22\nsource: IANA"} | Domain is active |
| 203.in-addr.arpa | 2026-07-12 | WHOIS | — | — | 2026-06-08 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: 203.in-addr.arpa\n\norganisation: APNIC\n\nnserver: apnic.authdns.ripe.net.\nnserver: ns1.apnic.net.\nnserver: ns2.apnic.net.\nnserver: ns3.lacnic.net.\nnserver: rirns.arin.net.\nds-rdata: 62187 13 2 31F1BFC2F95FBEB1CEA109D86641F6F533AC143F873E58B3266EBE69D817945C\n\nwhois: whois.apnic.net\n\nchanged: 1993-05\nchanged: 2026-06-08\nsource: IANA"} | Domain is active |
| 195.in-addr.arpa | 2026-07-09 | WHOIS | — | — | 2026-03-17 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: 195.in-addr.arpa\n\norganisation: RIPE NCC\n\nnserver: ns3.afrinic.net.\nnserver: ns3.lacnic.net.\nnserver: ns4.apnic.net.\nnserver: pri.authdns.ripe.net.\nnserver: rirns.arin.net.\nds-rdata: 59166 13 2 cbb1f07734a7c632f37c3729d0f0654e747be2abe1f8242ed93e13bc879ca740\n\nwhois: whois.ripe.net\n\nchanged: 1993-05\nchanged: 2026-03-17\nsource: IANA"} | Domain is active |
| … | … | … | … | … | … | … | … | … |
| Domain | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ip6.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-05-15 | — | 2026-07-11 | TRUE | {"DS":[{"digest":"068554efcb5861f42af93ef8e79c442a86c16fc5652e6b6d2419ed527f344d17","key_tag":13880,"algorithm":8,"digest_type":2},{"digest":"8a11501086330132be2c23f22dedf0634ad5ff668b4aa1988e172c6a2a4e5f7b","key_tag":64060,"algorithm":8,"digest_type":2},{"digest":"e6b54e0a20ce1edbfcb6879c02f5782059cecb043a31d804a04afa51af01d5fb","key_tag":45094,"algorithm":8,"digest_type":2}],"NS":["a.ip6-servers.arpa","b.ip6-servers.arpa","c.ip6-servers.arpa","d.ip6-servers.arpa","e.ip6-servers.arpa","f.ip6-servers.arpa"],"SOA":{"mname":"b.ip6-servers.arpa","retry":900,"rname":"nstld.iana.org","expire":604800,"serial":2026022515,"minimum":3600,"refresh":1800},"DNSKEY":[{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAZuV3D47mDLqI7GZY30GPX+O3kpT8s6k+Q2Iz9/mF5ua+XbncDI6VLDsnw4/r8lj3XC2LUhX/Pt4FdwzPonYf0bZAFShq2n7Sftb4oBOjX6Pel8PKYp6RkWjy4Wo351uBQxBOq+XkbYOeh46dJ9sk8iHBJFu35UP4OSBNm+0qWeB"},{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAdiTygbxKgCYFKx/ByKiFegRN+6Dkh2PiQwiDMsE1SaGOratXd5eZRXqQiqn8J9tnhFAxap2KmZ7pCTbdy3Xq1/nOMLpDgF5W8HWNMcWSClf0zfHty1DxPmawBk0mj3L3TgO6wIzxOuZxCchvOjkE9hy2xxUGmP8jQQogocy0mLj"},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAa8bJ22d6oorQjwmAivlT8diruwB75t3hz7G/FHOgFxTKnbRzkCtFItnxaBvD+lygqsj38amSqwsLYnNvejL/9kSzMdntRc5fC+9E+0m9Wq+liYSm60IxKvSL0fzApA80UgD1rpRtelBrkyiJyj3byiRcEDJhRXPmyQOqNDnVpq3tTDPlkwEAF7uAmp3qKRZWJF6VswoAFqya7pMiCt8M+No+xiWZro87ZqTwRUBMJWKafO5ONH+HoZDvDeP+CNsKyt5GTROX+UxxT8xSueJidceJsKaI75HvEOp0kLAr8TPSvg4eBkk5Pgn+LvNBQ3ZdPMfHIKSLbZ+J3OOJJIkgpk="},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAb+iy1CqMSS2fAoZhqeG0b1MxbegsUt94GIYCOe4PRQYiyVZb0Wi3s2RpSNoC1XNz1ne1CYAq2B0/XCwXzBVBppG4zJ6Hr4LAoXBRmlLSmNlbqbNJ8WCy0y5c6CNMKGRfd9KPzko1MO1wLbTRFiFDjE2h602c3K1qawngVcbRLMNnttAWJU2q+8BzdN26YeDdpsSFdPI+CbifItfwFfJx8BOIQkcOJX8gjFxs9bvGuXTaf7qLzyNFklZG7NY63ooOdVYV9UoZH0bcdVSRg4a/Ilqryvb9eBeihkWs1+h57ppQGcR61ryfQqGc+19hSvO9DM1+X2g9uFzdxs3zg5e3n8="}]} | 0.0000000929311 | 13,636,105 | 2026-07-07 | WHOIS | 2001-11-10 | — | 2025-07-10 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: IP6.ARPA\n\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington Delaware 19801\naddress: United States\n\ncontact: administrative\nname: Internet Architecture Board (IAB)\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington DE 19801\naddress: United States\nphone: +1 510 492 4080\nfax-no: +1 510 492 4001\ne-mail: iab@iab.org\n\ncontact: technical\nname: Internet Assigned Numbers Authority (IANA)\norganisation: Internet Corporation for Assigned Names and Numbers (ICANN)\naddress: 12025 Waterfront Drive\naddress: Suite 300\naddress: Los Angeles CA 90094\naddress: United States\nphone: +1 310 301 5800\nfax-no: +1 310 823 8649\ne-mail: tld-contact@iana.org\n\nnserver: A.IP6-SERVERS.ARPA 199.180.182.53 2620:37:e000::53\nnserver: B.IP6-SERVERS.ARPA 199.253.182.182 2001:500:86::86\nnserver: C.IP6-SERVERS.ARPA 196.216.169.11 2001:43f8:110::11\nnserver: D.IP6-SERVERS.ARPA 200.7.86.53 2001:13c7:7012::53\nnserver: E.IP6-SERVERS.ARPA 2001:dd8:6::101 203.119.86.101\nnserver: F.IP6-SERVERS.ARPA 193.0.9.2 2a13:27c0:30::2\nds-rdata: 13880 8 2 068554EFCB5861F42AF93EF8E79C442A86C16FC5652E6B6D2419ED527F344D17\nds-rdata: 45094 8 2 E6B54E0A20CE1EDBFCB6879C02F5782059CECB043A31D804A04AFA51AF01D5FB\nds-rdata: 64060 8 2 8A11501086330132BE2C23F22DEDF0634AD5FF668B4AA1988E172C6A2A4E5F7B\n\nremarks: This domain is administered as part of the .ARPA zone\nremarks: management, described at https://iana.org/domains/arpa\n\ncreated: 2001-11-10\nchanged: 2025-07-10\nsource: IANA"} | Domain is active |
| in-addr.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-05-14 | — | 2026-07-11 | TRUE | {"DS":[{"digest":"13e5501c56b20394da921b51412d48b7089c5eb6957a7c58553c4d4d424f04df","key_tag":53696,"algorithm":8,"digest_type":2},{"digest":"5cafccec201d1933b4c9f6a9c8f51e51f3b39979058ac21b8df1b1f281cbc6f2","key_tag":47054,"algorithm":8,"digest_type":2},{"digest":"aaf4fb5d213ef25ae44679032ebe3514c487d7abd99d7f5fec3383d030733c73","key_tag":63982,"algorithm":8,"digest_type":2},{"digest":"e0e2bf5cfbd66572ca05ec18267d91509ba6a9405af05c3fd4141dfa45200c08","key_tag":54956,"algorithm":8,"digest_type":2}],"NS":["a.in-addr-servers.arpa","b.in-addr-servers.arpa","c.in-addr-servers.arpa","d.in-addr-servers.arpa","e.in-addr-servers.arpa","f.in-addr-servers.arpa"],"SOA":{"mname":"b.in-addr-servers.arpa","retry":900,"rname":"nstld.iana.org","expire":604800,"serial":2026023083,"minimum":3600,"refresh":1800},"DNSKEY":[{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAaU/BBSt6weqX35dhPyUe0XlQMTNU7Skvf+WZztcDbsexjixVP5y+3QryKV4BLgApUIAs14y9Vp/75ibHh0sfvDpzUz/QqJ+nywiRN3Sg42Wlg/tCbUFBZ2fDKOhfC69Lxv+OfOZkGSH/CaxXNjrfjldqBXRyoMSlFIl0ecYO33b"},{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAaz/5oy0pjvJ1+8Nfq0Vu/MmNBUOn8XZ5aoobVz1CRE6bImJFmgMPG5Zpuk7AqPUxrVJn3dY2FEvHTJum9grYxy+xWv2nGmPMTq8c5JbyooZ3P3x0KpWpRCRXFlJJQJyd+EWAVpXPab2+4I3pA4wvoTUe1jn8OD2F3cJANmalsNl"},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAbNX16PjL99cu7CpO7Nt5EXoq8k6TCZpzxz13wCITdkwIce4UrzUqw7b76WH7N3KKAb4uJgmswkujk+gYMqnMAwNBFELrCDDkflw2AIjFPXBd2Txw8o3H5of2uIbAijm76B562VIiT3p0RIP1SH4eA+wHwYmqM3o/PiYfCxQD1c+EJx6b6dRcKAfeX4XMSsM6DyI6tjLGZ//w/IspRnbRb6Q36zWNyPPY2+5fqkaJ/94OKapvXTCUpWsNqKYlOxMwovwW9a2uBIgldzSq9mCtGUXU7mRZkwUIpnzA5Qe+lYdimWnzve7BXVs8ZZUyNhlDMlWYUrYHiaJ0uESYAWZQ98="},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAbdOaEhLDa/H2m+hbXBHiAUE95PgpL2358lkJCBmb2Dn7aImc5sqoaEa48hlabMuG2PfnbWd3ttpVXX6mwLRMppyhJeBbr1q2YWtzi+Xx5modXLKSDPuLliLUQ1oPnq2QWK7BUNwmV70gQSOx78vkisDqFzocC2aiFAi+D2r45GPvtBMbjfCA1FB0SELeUCsxhgoAHphO5T6ITCrOccM7XX7A4qRbcbS65HOcbT+UDG9OoXjmw2j8mWgJXrpwvdsskaISrTivzcqadgOinSgAL3bVYFKCkiVBmx87d88v+OuK+358xsUIU+0MzXUidLS8086BpdiEW4cJ6c08oDyC10="}]} | 0.0000000504849 | 13,658,324 | 2026-07-12 | WHOIS | 1994-09-27 | — | 2025-07-10 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: IN-ADDR.ARPA\n\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington Delaware 19801\naddress: United States\n\ncontact: administrative\nname: Internet Architecture Board (IAB)\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington Delaware 19801\naddress: United States\nphone: +1 510 492 4080\nfax-no: +1 510 492 4001\ne-mail: iab@iab.org\n\ncontact: technical\nname: Internet Assigned Numbers Authority (IANA)\norganisation: Internet Corporation for Assigned Names and Numbers (ICANN)\naddress: 12025 Waterfront Drive\naddress: Suite 300\naddress: Los Angeles California 90094\naddress: US\nphone: +1 310 301 5800\nfax-no: +1 310 823 8649\ne-mail: tld-contact@iana.org\n\nnserver: A.IN-ADDR-SERVERS.ARPA 199.180.182.53 2620:37:e000::53\nnserver: B.IN-ADDR-SERVERS.ARPA 199.253.183.183 2001:500:87:0:0:0:0:87\nnserver: C.IN-ADDR-SERVERS.ARPA 196.216.169.10 2001:43f8:110::10\nnserver: D.IN-ADDR-SERVERS.ARPA 200.10.60.53 2001:13c7:7010::53\nnserver: E.IN-ADDR-SERVERS.ARPA 2001:dd8:6::101 203.119.86.101\nnserver: F.IN-ADDR-SERVERS.ARPA 193.0.9.1 2a13:27c0:30::1\nds-rdata: 53696 8 2 13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D424F04DF\nds-rdata: 47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2\nds-rdata: 63982 8 2 AAF4FB5D213EF25AE44679032EBE3514C487D7ABD99D7F5FEC3383D030733C73\nds-rdata: 54956 8 2 E0E2BF5CFBD66572CA05EC18267D91509BA6A9405AF05C3FD4141DFA45200C08\n\nremarks: This domain is administered as part of the .ARPA zone\nremarks: management, described at https://iana.org/domains/arpa\n\ncreated: 1994-09-27\nchanged: 2025-07-10\nsource: IANA"} | Domain is active |
| lex.urn.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-05-18 | — | 2026-07-02 | TRUE | {"NAPTR":[{"flags":"","order":100,"regexp":"","service":"","preference":10,"replacement":"lex-nameserver.nic.it"}]} | 0.0000000368899 | 13,813,906 | 2026-07-08 | WHOIS | 2002-10-01 | — | 2026-05-22 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: URN.ARPA\n\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington DE 19801\naddress: United States\n\ncontact: administrative\nname: Internet Architecture Board (IAB)\norganisation: Internet Architecture Board (IAB)\naddress: c/o IETF Administration LLC\naddress: 1000 N. West St.\naddress: Suite 1200\naddress: Wilmington DE 19801\naddress: United States\nphone: +1 510 492 4080\nfax-no: +1 510 492 4001\ne-mail: iab@iab.org\n\ncontact: technical\nname: Internet Assigned Numbers Authority (IANA)\norganisation: Internet Corporation for Assigned Names and Numbers (ICANN)\naddress: 12025 Waterfront Drive\naddress: Suite 300\naddress: Los Angeles CA 90094\naddress: United States\nphone: +1 310 301 5800\nfax-no: +1 310 823 8649\ne-mail: tld-contact@iana.org\n\nnserver: A.IANA-SERVERS.NET\nnserver: B.IANA-SERVERS.NET\nnserver: C.IANA-SERVERS.NET\nnserver: NS3.LACNIC.NET\nnserver: NS4.APNIC.NET\nds-rdata: 45052 8 2 7685B675F93ADA412CFE534820C8DCC55654B1711F677BA83A8564C12943F695\nds-rdata: 28996 8 2 8E66D01A1E5864BCDB8E1F85579AEC7C8C536C9D6FC7032EE708E869FD27F3D3\nds-rdata: 34555 8 2 BD743967DEF1CAF0812FE9EFF2371D3ADF29E27251DB272145A5D523C92F7101\n\nremarks: This domain is administered as part of the .ARPA zone\nremarks: management, described at https://iana.org/domains/arpa\n\ncreated: 2002-10-01\nchanged: 2026-05-22\nsource: IANA"} | Domain is active |
| 203.in-addr.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-04-21 | — | 2026-07-10 | TRUE | {"DS":[{"digest":"31f1bfc2f95fbeb1cea109d86641f6f533ac143f873e58b3266ebe69d817945c","key_tag":62187,"algorithm":13,"digest_type":2}],"NS":["apnic.authdns.ripe.net","ns1.apnic.net","ns2.apnic.net","ns3.lacnic.net","rirns.arin.net"],"SOA":{"mname":"ns.apnic.net","retry":1800,"rname":"read-txt-record-of-zone-first-dns-admin.apnic.net","expire":604800,"serial":3006153214,"minimum":3600,"refresh":7200},"TXT":["'203/8 zone'"],"DNSKEY":[{"flags":256,"protocol":3,"algorithm":13,"public_key":"tYyoBTfwYu8E9MzCUQ/NpH9E745A7borclcuT2LcG93QFiwAWzXC+8gTB8KTC159SdkKWsBHw9ZZ0qWMhWWGhw=="},{"flags":257,"protocol":3,"algorithm":13,"public_key":"4H3UQtxJd+rqlNeGwNHy27oAdMU1d27RrSvNBM9E8Sr1q/9bTUA3xNTyPOPWyIICWeVbHv0HBRQgSpq+z0w8TQ=="}]} | 0.0000000368898 | 13,813,836 | 2026-07-12 | WHOIS | — | — | 2026-06-08 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: 203.in-addr.arpa\n\norganisation: APNIC\n\nnserver: apnic.authdns.ripe.net.\nnserver: ns1.apnic.net.\nnserver: ns2.apnic.net.\nnserver: ns3.lacnic.net.\nnserver: rirns.arin.net.\nds-rdata: 62187 13 2 31F1BFC2F95FBEB1CEA109D86641F6F533AC143F873E58B3266EBE69D817945C\n\nwhois: whois.apnic.net\n\nchanged: 1993-05\nchanged: 2026-06-08\nsource: IANA"} | Domain is active |
| 195.in-addr.arpa | arpa | ICANN | HTTP 0 | — | — | — | 2026-04-21 | — | 2026-07-06 | TRUE | {"DS":[{"digest":"cbb1f07734a7c632f37c3729d0f0654e747be2abe1f8242ed93e13bc879ca740","key_tag":59166,"algorithm":13,"digest_type":2}],"NS":["ns3.afrinic.net","ns3.lacnic.net","ns4.apnic.net","pri.authdns.ripe.net","rirns.arin.net"],"SOA":{"mname":"pri.authdns.ripe.net","retry":600,"rname":"dns.ripe.net","expire":864000,"serial":1783289456,"minimum":3600,"refresh":3600},"DNSKEY":[{"flags":257,"protocol":3,"algorithm":13,"public_key":"DjH9KxyFdUypfwA0eZKTWVSDff0nhUs2pwknXUBHKYAWo6B4l5brn/xrUp9ZZvk2xFV7AdULTEDIgOoV24RHHg=="}]} | 0.0000000304479 | 12,491,975 | 2026-07-09 | WHOIS | — | — | 2026-03-17 | — | {"raw_response":"% IANA WHOIS server\n% for more information on IANA, visit http://www.iana.org\n% This query returned 1 object\n\ndomain: 195.in-addr.arpa\n\norganisation: RIPE NCC\n\nnserver: ns3.afrinic.net.\nnserver: ns3.lacnic.net.\nnserver: ns4.apnic.net.\nnserver: pri.authdns.ripe.net.\nnserver: rirns.arin.net.\nds-rdata: 59166 13 2 cbb1f07734a7c632f37c3729d0f0654e747be2abe1f8242ed93e13bc879ca740\n\nwhois: whois.ripe.net\n\nchanged: 1993-05\nchanged: 2026-03-17\nsource: IANA"} | Domain is active |
| … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … |
Showing 5 of 227 rows · All active domains · Every live domain with its TLD and domain type.
TLD suffixes under .arpa
Public Suffix List entries that sit one level below .arpa.
| TLD suffix | Domain type | Count of domains | % of .arpa | |
|---|---|---|---|---|
| .uri.arpa | ICANN | 3 | 1.3% | View → |
| .urn.arpa | ICANN | 2 | 0.88% | View → |
| .iris.arpa | ICANN | 1 | 0.44% | View → |
| .e164.arpa | ICANN | 1 | 0.44% | View → |
| .home.arpa | ICANN | 1 | 0.44% | View → |
| .ip6.arpa | ICANN | 1 | 0.44% | View → |
Showing 6 of 6 suffixes registered under .arpa. Browse all TLD suffixes →
The .arpa dataset
Everything we have on 227 active .arpa domains in one downloadable file — fresh export every day.
Buy a dataset to download .arpa
The full .arpa slice (1.0 KB JSONL, fresh daily exports) lives inside each dataset. Get one from €29 to €599 per month and download immediately.
How to download the .arpa domain list
The complete .arpa 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 .arpa 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 .arpa 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 .arpa domains are there?
webatla tracks 227 active .arpa 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 .arpa domains?
Yes, the full .arpa 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 .arpa domain list?
Choose a dataset, and the full .arpa 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 .arpa 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 .arpa domains, or the whole database?
Both. Each dataset is a single downloadable file, buy just the one you need for .arpa. Or buy All data for the entire database: every dataset combined (identity, ranking, technologies, DNS and RDAP/WHOIS) in one file. Daily fresh export.
Other TLDs