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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:e621::1

1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa

Zone 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa72 queries in 2.6 s2026-11-09 05:55:24 UTCNot DNSSEC-signed

WHOIS for 2607:f740:e621::1 →TextJSON
  • Problem Resolution of 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa stops at 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa: none of its nameservers answered.
  • Problem None of 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa's nameservers gave an authoritative answer, so the zone is effectively offline.
  • Warning dns1.p01.nsone.net (198.51.44.1) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
  • Warning dns1.p01.nsone.net (2620:4d:4000:6259:7:1:0:1) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
  • Warning dns2.p01.nsone.net (198.51.45.1) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
  • Warning dns2.p01.nsone.net (2a00:edc0:6259:7:1::2) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
  • Warning dns3.p01.nsone.net (198.51.44.65) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
  • Warning dns3.p01.nsone.net (2620:4d:4000:6259:7:1:0:3) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
  • Warning dns4.p01.nsone.net (198.51.45.65) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
  • Warning dns4.p01.nsone.net (2a00:edc0:6259:7:1::4) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
  • Note 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Resolution trace

  1. .asked a.root-servers.net 198.41.0.412 ms

    Referral to ip6.arpa. signed (3 DS)

    • b.ip6-servers.arpa 199.253.182.182 2001:500:86::86
    • 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
    • e.ip6-servers.arpa 203.119.86.101 2001:dd8:6::101
  2. ip6.arpa.asked f.ip6-servers.arpa 193.0.9.211 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.

  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

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

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

    199.180.180.63 failed: NOERROR

  4. 0.4.7.f.7.0.6.2.ip6.arpa.asked ns3.vrdns.info 208.111.40.6143 ms

    Referral to 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa. unsigned delegation

    • dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
    • dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2
    • dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
    • dns3.p01.nsone.net 198.51.44.65 2620:4d:4000:6259:7:1:0:3

    No glue for dns1.p01.nsone.net, dns2.p01.nsone.net, dns4.p01.nsone.net, dns3.p01.nsone.net: addresses looked up via a resolver.

    104.225.4.101 failed: NOERROR

  5. 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.

    No nameserver of 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa answered.

    198.51.45.65 failed: REFUSED

    198.51.44.1 failed: REFUSED

    198.51.44.65 failed: REFUSED

    198.51.45.1 failed: REFUSED

    2620:4d:4000:6259:7:1:0:3 failed: REFUSED

    2a00:edc0:6259:7:1::2 failed: REFUSED

Nameservers

Every address of every nameserver, asked for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa's SOA. "Parent" means the 0.4.7.f.7.0.6.2.ip6.arpa zone delegates to it; "zone" means 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p01.nsone.netparent198.51.44.1 glueREFUSED14 ms
2620:4d:4000:6259:7:1:0:1 glueREFUSED13 ms
dns2.p01.nsone.netparent198.51.45.1 glueREFUSED5.8 ms
2a00:edc0:6259:7:1::2 glueREFUSED13 ms
dns3.p01.nsone.netparent198.51.44.65 glueREFUSED16 ms
2620:4d:4000:6259:7:1:0:3 glueREFUSED13 ms
dns4.p01.nsone.netparent198.51.45.65 glueREFUSED5.9 ms
2a00:edc0:6259:7:1::4 glueREFUSED13 ms

DNSSEC

1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa isn't signed: no DS at the parent and no DNSKEY in the zone.

Hosts and reverse DNS

Every hostname the records point at, resolved to its addresses; each address's PTR (reverse DNS), with ✓ where the PTR name resolves back to the same address.

HostAddressReverse DNS (PTR)
dns1.p01.nsone.net
nameserver
198.51.44.1dns1.p01.nsone.net ✓
2620:4d:4000:6259:7:1:0:1dns1.p01.nsone.net ✓
dns2.p01.nsone.net
nameserver
198.51.45.1dns2.p01.nsone.net ✓
2a00:edc0:6259:7:1::2dns2.p01.nsone.net ✓
dns3.p01.nsone.net
nameserver
198.51.44.65dns3.p01.nsone.net ✓
2620:4d:4000:6259:7:1:0:3dns3.p01.nsone.net ✓
dns4.p01.nsone.net
nameserver
198.51.45.65dns4.p01.nsone.net ✓
2a00:edc0:6259:7:1::4dns4.p01.nsone.net ✓

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

Text dump

; DNS report for 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa (2607:f740:e621::1)
; 2026-11-09 05:55:24 UTC, 72 queries in 2.64 s, zone 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa

;; FINDINGS
;  [ERROR] Resolution of 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa stops at 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa: none of its nameservers answered.
;  [ERROR] None of 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa's nameservers gave an authoritative answer, so the zone is effectively offline.
;  [WARN] dns1.p01.nsone.net (198.51.44.1) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
;  [WARN] dns1.p01.nsone.net (2620:4d:4000:6259:7:1:0:1) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
;  [WARN] dns2.p01.nsone.net (198.51.45.1) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
;  [WARN] dns2.p01.nsone.net (2a00:edc0:6259:7:1::2) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
;  [WARN] dns3.p01.nsone.net (198.51.44.65) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
;  [WARN] dns3.p01.nsone.net (2620:4d:4000:6259:7:1:0:3) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
;  [WARN] dns4.p01.nsone.net (198.51.45.65) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
;  [WARN] dns4.p01.nsone.net (2a00:edc0:6259:7:1::4) answers REFUSED for 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
;  [INFO] 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; TRACE
;  1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa PTR
;  . @a.root-servers.net (198.41.0.4) 12 ms [NOERROR qr]: referral to ip6.arpa.
ip6.arpa.		NS	b.ip6-servers.arpa.	; 199.253.182.182 2001:500:86::86
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	e.ip6-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
ip6.arpa.	86400	IN	DS	13880 8 2 068554EFCB5861F42AF93EF8E79C442A86C16FC5652E6B6D2419ED527F344D17
ip6.arpa.	86400	IN	DS	64060 8 2 8A11501086330132BE2C23F22DEDF0634AD5FF668B4AA1988E172C6A2A4E5F7B
ip6.arpa.	86400	IN	DS	45094 8 2 E6B54E0A20CE1EDBFCB6879C02F5782059CECB043A31D804A04AFA51AF01D5FB
;  ip6.arpa. @f.ip6-servers.arpa (193.0.9.2) 11 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	ns2.vrdns.net.	; 209.177.157.6
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.		NS	ns1.vrdns.com.	; 104.225.4.101
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. @ns3.vrdns.info (208.111.40.6) 143 ms [NOERROR qr]: referral to 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.
1.2.6.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
1.2.6.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
1.2.6.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
1.2.6.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
;  1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa.: failed: No nameserver of 1.2.6.e.0.4.7.f.7.0.6.2.ip6.arpa answered.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             REFUSED                               14 ms
;    2620:4d:4000:6259:7:1:0:1               REFUSED                               13 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             REFUSED                               5.8 ms
;    2a00:edc0:6259:7:1::2                   REFUSED                               13 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            REFUSED                               16 ms
;    2620:4d:4000:6259:7:1:0:3               REFUSED                               13 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            REFUSED                               5.9 ms
;    2a00:edc0:6259:7:1::4                   REFUSED                               13 ms

;; DNSSEC: unsigned

;; HOSTS
;  dns1.p01.nsone.net (nameserver)
;    198.51.44.1                             PTR dns1.p01.nsone.net (confirmed)
;    2620:4d:4000:6259:7:1:0:1               PTR dns1.p01.nsone.net (confirmed)
;  dns2.p01.nsone.net (nameserver)
;    198.51.45.1                             PTR dns2.p01.nsone.net (confirmed)
;    2a00:edc0:6259:7:1::2                   PTR dns2.p01.nsone.net (confirmed)
;  dns3.p01.nsone.net (nameserver)
;    198.51.44.65                            PTR dns3.p01.nsone.net (confirmed)
;    2620:4d:4000:6259:7:1:0:3               PTR dns3.p01.nsone.net (confirmed)
;  dns4.p01.nsone.net (nameserver)
;    198.51.45.65                            PTR dns4.p01.nsone.net (confirmed)
;    2a00:edc0:6259:7:1::4                   PTR dns4.p01.nsone.net (confirmed)

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