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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.

2607:f740:e623:4::1

1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.0.0.3.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa

Zone 0.4.7.f.7.0.6.2.ip6.arpa32 queries in 1.1 s2026-11-09 06:13:15 UTC

WHOIS for 2607:f740:e623:4::1 →TextJSON
  • Problem 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.0.0.3.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa doesn't exist (NXDOMAIN from 0.4.7.f.7.0.6.2.ip6.arpa's nameservers).

Resolution trace

  1. .asked i.root-servers.net 192.36.148.175.8 ms

    Referral to ip6.arpa. signed (3 DS)

    • d.ip6-servers.arpa 200.7.86.53 2001:13c7:7012::53
    • f.ip6-servers.arpa 193.0.9.2 2a13:27c0:30::2
    • a.ip6-servers.arpa 199.180.182.53 2620:37:e000::53
    • c.ip6-servers.arpa 196.216.169.11 2001:43f8:110::11
    • b.ip6-servers.arpa 199.253.182.182 2001:500:86::86
    • e.ip6-servers.arpa 203.119.86.101 2001:dd8:6::101

    199.7.91.13 failed: NOERROR

  2. ip6.arpa.asked c.ip6-servers.arpa 196.216.169.11169 ms

    Referral to 0.6.2.ip6.arpa. signed (1 DS)

    • r.arin.net 199.180.180.63 2001:500:f0::63
    • u.arin.net 204.61.216.50 2001:500:14:6050:ad::1
    • x.arin.net 199.180.180.63 2001:500:f0::63
    • y.arin.net 192.82.134.30 2001:500:127::30
    • z.arin.net 199.180.180.63 2001:500:f0::63
    • arin.authdns.ripe.net 193.0.9.10 2a13:27c0:30::10

    No glue for r.arin.net, u.arin.net, x.arin.net, y.arin.net, z.arin.net, arin.authdns.ripe.net: addresses looked up via a resolver.

    203.119.86.101 failed: NOERROR

  3. 0.6.2.ip6.arpa.asked x.arin.net 199.180.180.6390 ms

    Referral to 0.4.7.f.7.0.6.2.ip6.arpa. unsigned delegation

    • ns3.vrdns.info 208.111.40.6
    • ns2.vrdns.net 209.177.157.6
    • ns1.vrdns.com 104.225.4.101
    • ns4.vrdns.co.uk 176.58.88.95

    No glue for ns3.vrdns.info, ns2.vrdns.net, ns1.vrdns.com, ns4.vrdns.co.uk: addresses looked up via a resolver.

    199.180.180.63 failed: NOERROR

  4. 0.4.7.f.7.0.6.2.ip6.arpa.asked ns4.vrdns.co.uk 176.58.88.9520 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
Google 8.8.8.8NXDOMAIN
Quad9 9.9.9.9NXDOMAIN
OpenDNS 208.67.222.222NXDOMAIN

Text dump

; DNS report for 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.0.0.3.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa (2607:f740:e623:4::1)
; 2026-11-09 06:13:15 UTC, 32 queries in 1.10 s, zone 0.4.7.f.7.0.6.2.ip6.arpa

;; FINDINGS
;  [ERROR] 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.0.0.3.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa doesn't exist (NXDOMAIN from 0.4.7.f.7.0.6.2.ip6.arpa's nameservers).

;; TRACE
;  1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.0.0.3.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa PTR
;  . @i.root-servers.net (192.36.148.17) 5.8 ms [NOERROR qr]: referral to ip6.arpa.
ip6.arpa.		NS	d.ip6-servers.arpa.	; 200.7.86.53 2001:13c7:7012::53
ip6.arpa.		NS	f.ip6-servers.arpa.	; 193.0.9.2 2a13:27c0:30::2
ip6.arpa.		NS	a.ip6-servers.arpa.	; 199.180.182.53 2620:37:e000::53
ip6.arpa.		NS	c.ip6-servers.arpa.	; 196.216.169.11 2001:43f8:110::11
ip6.arpa.		NS	b.ip6-servers.arpa.	; 199.253.182.182 2001:500:86::86
ip6.arpa.		NS	e.ip6-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
ip6.arpa.	86400	IN	DS	64060 8 2 8A11501086330132BE2C23F22DEDF0634AD5FF668B4AA1988E172C6A2A4E5F7B
ip6.arpa.	86400	IN	DS	45094 8 2 E6B54E0A20CE1EDBFCB6879C02F5782059CECB043A31D804A04AFA51AF01D5FB
ip6.arpa.	86400	IN	DS	13880 8 2 068554EFCB5861F42AF93EF8E79C442A86C16FC5652E6B6D2419ED527F344D17
;  ip6.arpa. @c.ip6-servers.arpa (196.216.169.11) 169 ms [NOERROR qr]: referral to 0.6.2.ip6.arpa.
0.6.2.ip6.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
0.6.2.ip6.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
0.6.2.ip6.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
0.6.2.ip6.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
0.6.2.ip6.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
0.6.2.ip6.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
0.6.2.ip6.arpa.	86400	IN	DS	38329 8 2 A1341E46247644D35D5E6E2DDD0A9AA680152C25A7356487A9D597BB7FBFFD79
;  0.6.2.ip6.arpa. @x.arin.net (199.180.180.63) 90 ms [NOERROR qr]: referral to 0.4.7.f.7.0.6.2.ip6.arpa.
0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns3.vrdns.info.	; 208.111.40.6
0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns2.vrdns.net.	; 209.177.157.6
0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns1.vrdns.com.	; 104.225.4.101
0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns4.vrdns.co.uk.	; 176.58.88.95
;  0.4.7.f.7.0.6.2.ip6.arpa. @ns4.vrdns.co.uk (176.58.88.95) 20 ms [NXDOMAIN qr aa]: NXDOMAIN

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