DNS lookup
Everything DNS says about a domain: traced from the root servers down, every record type asked of the domain's own nameservers, each nameserver checked, then every hostname and policy record it points at followed, with SPF, DMARC, DKIM and DNSSEC checked along the way.
2a04:4e42::81
1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.4.e.4.4.0.a.2.ip6.arpa
Zone 0.a.2.ip6.arpa20 queries in 1.0 s2026-11-09 05:35:08 UTC
- Problem 1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.4.e.4.4.0.a.2.ip6.arpa doesn't exist (NXDOMAIN from 0.a.2.ip6.arpa's nameservers).
Resolution trace
- .asked d.root-servers.net 199.7.91.136.0 ms
Referral to ip6.arpa. signed (3 DS)
- a.ip6-servers.arpa 199.180.182.53 2620:37:e000::53
- b.ip6-servers.arpa 199.253.182.182 2001:500:86::86
- c.ip6-servers.arpa 196.216.169.11 2001:43f8:110::11
- d.ip6-servers.arpa 200.7.86.53 2001:13c7:7012::53
- e.ip6-servers.arpa 203.119.86.101 2001:dd8:6::101
- f.ip6-servers.arpa 193.0.9.2 2a13:27c0:30::2
- ip6.arpa.asked d.ip6-servers.arpa 200.7.86.53117 ms
Referral to 0.a.2.ip6.arpa. signed (1 DS)
- ns3.lacnic.net 200.3.13.14 2001:13c7:7002:3000::14
- ns3.afrinic.net 204.61.216.100 2001:500:14:6100:ad::1
- pri.authdns.ripe.net 193.0.9.5 2a13:27c0:30::5
- ns4.apnic.net 202.12.31.53 2001:dd8:12::53
- rirns.arin.net 199.253.249.53 2620:38:2000::53
No glue for ns3.lacnic.net, ns3.afrinic.net, pri.authdns.ripe.net, ns4.apnic.net, rirns.arin.net: addresses looked up via a resolver.
203.119.86.101 failed: NOERROR
- 0.a.2.ip6.arpa.asked pri.authdns.ripe.net 193.0.9.512 ms
NXDOMAIN: this name does not exist.
Public resolvers
What four public resolvers answer right now, from their caches. Highlighted values differ from the authoritative answer: either a recent change they haven't picked up yet (the TTL says how long until they do), or, for A and AAAA, a CDN or geo-routed site handing each resolver location its own addresses.
| Resolver | PTR |
|---|---|
| Cloudflare 1.1.1.1 | NXDOMAIN validated |
| Google 8.8.8.8 | NXDOMAIN validated |
| Quad9 9.9.9.9 | NXDOMAIN validated |
| OpenDNS 208.67.222.222 | NXDOMAIN validated |
Text dump
; DNS report for 1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.4.e.4.4.0.a.2.ip6.arpa (2a04:4e42::81) ; 2026-11-09 05:35:08 UTC, 20 queries in 1.00 s, zone 0.a.2.ip6.arpa ;; FINDINGS ; [ERROR] 1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.4.e.4.4.0.a.2.ip6.arpa doesn't exist (NXDOMAIN from 0.a.2.ip6.arpa's nameservers). ;; TRACE ; 1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.4.e.4.4.0.a.2.ip6.arpa PTR ; . @d.root-servers.net (199.7.91.13) 6.0 ms [NOERROR qr]: referral to ip6.arpa. ip6.arpa. NS a.ip6-servers.arpa. ; 199.180.182.53 2620:37:e000::53 ip6.arpa. NS b.ip6-servers.arpa. ; 199.253.182.182 2001:500:86::86 ip6.arpa. NS c.ip6-servers.arpa. ; 196.216.169.11 2001:43f8:110::11 ip6.arpa. NS d.ip6-servers.arpa. ; 200.7.86.53 2001:13c7:7012::53 ip6.arpa. NS e.ip6-servers.arpa. ; 203.119.86.101 2001:dd8:6::101 ip6.arpa. NS f.ip6-servers.arpa. ; 193.0.9.2 2a13:27c0:30::2 ip6.arpa. 86400 IN DS 13880 8 2 068554EFCB5861F42AF93EF8E79C442A86C16FC5652E6B6D2419ED527F344D17 ip6.arpa. 86400 IN DS 45094 8 2 E6B54E0A20CE1EDBFCB6879C02F5782059CECB043A31D804A04AFA51AF01D5FB ip6.arpa. 86400 IN DS 64060 8 2 8A11501086330132BE2C23F22DEDF0634AD5FF668B4AA1988E172C6A2A4E5F7B ; ip6.arpa. @d.ip6-servers.arpa (200.7.86.53) 117 ms [NOERROR qr]: referral to 0.a.2.ip6.arpa. 0.a.2.ip6.arpa. NS ns3.lacnic.net. ; 200.3.13.14 2001:13c7:7002:3000::14 0.a.2.ip6.arpa. NS ns3.afrinic.net. ; 204.61.216.100 2001:500:14:6100:ad::1 0.a.2.ip6.arpa. NS pri.authdns.ripe.net. ; 193.0.9.5 2a13:27c0:30::5 0.a.2.ip6.arpa. NS ns4.apnic.net. ; 202.12.31.53 2001:dd8:12::53 0.a.2.ip6.arpa. NS rirns.arin.net. ; 199.253.249.53 2620:38:2000::53 0.a.2.ip6.arpa. 86400 IN DS 6737 13 2 F346C2BE7A1D04F367DC2B24556FA5F6AE515F4C005C7D44508B31E8D79C9694 ; 0.a.2.ip6.arpa. @pri.authdns.ripe.net (193.0.9.5) 12 ms [NXDOMAIN qr aa]: NXDOMAIN ;; PUBLIC RESOLVERS ; Cloudflare PTR NXDOMAIN ad ; Google PTR NXDOMAIN ad ; Quad9 PTR NXDOMAIN ad ; OpenDNS PTR NXDOMAIN ad