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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.

Try example.com, gmail.com, www.github.com, dnssec-failed.org, 1.1.1.1. A URL, e-mail address or IP address works too.

2a04:4e42:600::81

1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.0.2.4.e.4.4.0.a.2.ip6.arpa

Zone 0.a.2.ip6.arpa20 queries in 0.2 s2026-11-09 05:35:08 UTC

WHOIS for 2a04:4e42:600::81 →TextJSON
  • Problem 1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.0.2.4.e.4.4.0.a.2.ip6.arpa doesn't exist (NXDOMAIN from 0.a.2.ip6.arpa's nameservers).

Resolution trace

  1. .asked f.root-servers.net 192.5.5.2416.7 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

    199.7.83.42 failed: NOERROR

  2. ip6.arpa.asked b.ip6-servers.arpa 199.253.182.1826.2 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
    • ns4.apnic.net 202.12.31.53 2001:dd8:12::53
    • pri.authdns.ripe.net 193.0.9.5 2a13:27c0:30::5
    • rirns.arin.net 199.253.249.53 2620:38:2000::53

    No glue for ns3.lacnic.net, ns3.afrinic.net, ns4.apnic.net, pri.authdns.ripe.net, rirns.arin.net: addresses looked up via a resolver.

    193.0.9.2 failed: NOERROR

  3. 0.a.2.ip6.arpa.asked ns3.afrinic.net 204.61.216.1005.7 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.

ResolverPTR
Cloudflare 1.1.1.1NXDOMAIN
validated
Google 8.8.8.8NXDOMAIN
validated
Quad9 9.9.9.9NXDOMAIN
validated
OpenDNS 208.67.222.222NXDOMAIN
validated

Text dump

; DNS report for 1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.0.2.4.e.4.4.0.a.2.ip6.arpa (2a04:4e42:600::81)
; 2026-11-09 05:35:08 UTC, 20 queries in 0.16 s, zone 0.a.2.ip6.arpa

;; FINDINGS
;  [ERROR] 1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.0.2.4.e.4.4.0.a.2.ip6.arpa doesn't exist (NXDOMAIN from 0.a.2.ip6.arpa's nameservers).

;; TRACE
;  1.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.0.2.4.e.4.4.0.a.2.ip6.arpa PTR
;  . @f.root-servers.net (192.5.5.241) 6.7 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. @b.ip6-servers.arpa (199.253.182.182) 6.2 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	ns4.apnic.net.	; 202.12.31.53 2001:dd8:12::53
0.a.2.ip6.arpa.		NS	pri.authdns.ripe.net.	; 193.0.9.5 2a13:27c0:30::5
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. @ns3.afrinic.net (204.61.216.100) 5.7 ms [NXDOMAIN qr aa]: NXDOMAIN

;; PUBLIC RESOLVERS
;  Cloudflare PTR   NXDOMAIN  ad
;  Google     PTR   NXDOMAIN  ad
;  Quad9      PTR   NXDOMAIN  ad
;  OpenDNS    PTR   NXDOMAIN  ad