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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:e05a::1

1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa

Zone 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa60 queries in 2.6 s2026-11-09 05:55:18 UTC

WHOIS for 2607:f740:e05a::1 →TextJSON
  • Problem 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa doesn't exist (NXDOMAIN from 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa's nameservers). The domain isn't registered, or its registration has lapsed.

Resolution trace

  1. .asked f.root-servers.net 192.5.5.2416.3 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
  2. ip6.arpa.asked d.ip6-servers.arpa 200.7.86.53117 ms

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

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

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

    203.119.86.101 failed: NOERROR

  3. 0.6.2.ip6.arpa.asked arin.authdns.ripe.net 193.0.9.1011 ms

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

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

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

  4. 0.4.7.f.7.0.6.2.ip6.arpa.asked ns2.vrdns.net 209.177.157.693 ms

    Referral to a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa. unsigned delegation

    • dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
    • dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
    • ns01.amcndns.com 45.54.99.1 2607:f740:e05a::1
    • ns03.amcndns.net 45.54.99.129 2607:f740:e05a:8::1
    • ns04.amcndns.net 45.54.99.193 2607:f740:e05a:c::1
    • dns3.p01.nsone.net 198.51.44.65 2620:4d:4000:6259:7:1:0:3
    • ns01.amcndns.net 45.54.99.1 2607:f740:e05a::1
    • ns04.amcndns.com 45.54.99.193 2607:f740:e05a:c::1
    • ns03.amcndns.com 45.54.99.129 2607:f740:e05a:8::1
    • ns02.amcndns.com 45.54.99.65 2607:f740:e05a:4::1
    • dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2
    • ns02.amcndns.net 45.54.99.65 2607:f740:e05a:4::1

    No glue for dns4.p01.nsone.net, dns1.p01.nsone.net, ns01.amcndns.com, ns03.amcndns.net, ns04.amcndns.net, dns3.p01.nsone.net, ns01.amcndns.net, ns04.amcndns.com, ns03.amcndns.com, ns02.amcndns.com, dns2.p01.nsone.net, ns02.amcndns.net: addresses looked up via a resolver.

  5. a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.asked dns3.p01.nsone.net 198.51.44.6514 ms

    NXDOMAIN: this name does not exist.

    45.54.99.1 failed: REFUSED

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 1.1.1.1timed out
Google 8.8.8.8NXDOMAIN
Quad9 9.9.9.9NXDOMAIN
OpenDNS 208.67.222.222timed out

Text dump

; DNS report for 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa (2607:f740:e05a::1)
; 2026-11-09 05:55:18 UTC, 60 queries in 2.56 s, zone 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa

;; FINDINGS
;  [ERROR] 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa doesn't exist (NXDOMAIN from 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa's nameservers). The domain isn't registered, or its registration has lapsed.

;; TRACE
;  1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa PTR
;  . @f.root-servers.net (192.5.5.241) 6.3 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 0.6.2.ip6.arpa.
0.6.2.ip6.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
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	r.arin.net.	; 199.180.180.63 2001:500:f0::63
0.6.2.ip6.arpa.		NS	x.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.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
0.6.2.ip6.arpa.	86400	IN	DS	38329 8 2 A1341E46247644D35D5E6E2DDD0A9AA680152C25A7356487A9D597BB7FBFFD79
;  0.6.2.ip6.arpa. @arin.authdns.ripe.net (193.0.9.10) 11 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	ns1.vrdns.com.	; 104.225.4.101
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	ns3.vrdns.info.	; 208.111.40.6
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. @ns2.vrdns.net (209.177.157.6) 93 ms [NOERROR qr]: referral to a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns01.amcndns.com.	; 45.54.99.1 2607:f740:e05a::1
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns03.amcndns.net.	; 45.54.99.129 2607:f740:e05a:8::1
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns04.amcndns.net.	; 45.54.99.193 2607:f740:e05a:c::1
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns01.amcndns.net.	; 45.54.99.1 2607:f740:e05a::1
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns04.amcndns.com.	; 45.54.99.193 2607:f740:e05a:c::1
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns03.amcndns.com.	; 45.54.99.129 2607:f740:e05a:8::1
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns02.amcndns.com.	; 45.54.99.65 2607:f740:e05a:4::1
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa.		NS	ns02.amcndns.net.	; 45.54.99.65 2607:f740:e05a:4::1
;  a.5.0.e.0.4.7.f.7.0.6.2.ip6.arpa. @dns3.p01.nsone.net (198.51.44.65) 14 ms [NXDOMAIN qr aa]: NXDOMAIN

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