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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.

2610:a1:32d1::53

3.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.d.2.3.1.a.0.0.0.1.6.2.ip6.arpa

Zone 1.a.0.0.0.1.6.2.ip6.arpa108 queries in 1.1 s2026-11-09 06:03:15 UTCNot DNSSEC-signed

WHOIS for 2610:a1:32d1::53 →TextJSON
  • Note 1.a.0.0.0.1.6.2.ip6.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of pdns1.ultradns.net (204.74.108.1), an authoritative server: no cache in between, so these are the live values.

PTR Reverse pointer

3600PTRdns-01.ultradns2.org.
ANY query: refused politely (RFC 8482)
3600HINFO"RFC8482" ""

No records of type A, AAAA, CNAME, DNAME, NS, SOA, MX, TXT, CAA, HTTPS, SVCB, SRV, NAPTR, DS, DNSKEY, CDS, CDNSKEY, NSEC3PARAM, TLSA, SSHFP, LOC, HINFO, RP, URI, SPF, OPENPGPKEY, ZONEMD, CSYNC.

Resolution trace

  1. .asked h.root-servers.net 198.97.190.536.2 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

    192.112.36.4 failed: NOERROR

  2. ip6.arpa.asked d.ip6-servers.arpa 200.7.86.53118 ms

    Referral to 0.0.0.1.6.2.ip6.arpa. signed (1 DS)

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

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

  3. 0.0.0.1.6.2.ip6.arpa.asked r.arin.net 199.180.180.6390 ms

    Referral to 1.a.0.0.0.1.6.2.ip6.arpa. unsigned delegation

    • pdns3.ultradns.org 199.7.68.1 2610:a1:1015::1
    • pdns1.ultradns.net 204.74.108.1 2001:502:f3ff::1
    • pdns5.ultradns.info 204.74.114.1 2610:a1:1016::1
    • pdns6.ultradns.co.uk 204.74.115.1 2610:a1:1017::1
    • pdns2.ultradns.net 204.74.109.1 2610:a1:1014::1
    • pdns4.ultradns.org 199.7.69.1 2001:502:4612::1

    No glue for pdns3.ultradns.org, pdns1.ultradns.net, pdns5.ultradns.info, pdns6.ultradns.co.uk, pdns2.ultradns.net, pdns4.ultradns.org: addresses looked up via a resolver.

    199.180.180.63 failed: NOERROR

  4. 1.a.0.0.0.1.6.2.ip6.arpa.asked pdns6.ultradns.co.uk 204.74.115.116 ms

    Answer (authoritative):

    3.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.d.2.3.1.a.0.0.0.1.6.2.ip6.arpa.3600PTRdns-01.ultradns2.org.

    199.7.69.1 failed: NOERROR

Nameservers

Every address of every nameserver, asked for 1.a.0.0.0.1.6.2.ip6.arpa's SOA. "Parent" means the 0.0.0.1.6.2.ip6.arpa zone delegates to it; "zone" means 1.a.0.0.0.1.6.2.ip6.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
pdns1.ultradns.netparent + zone204.74.108.1 glueauthoritative20220202315.7 ms
2001:502:f3ff::1 glueauthoritative20220202315.8 ms
pdns2.ultradns.netparent + zone204.74.109.1 glueauthoritative20220202316.0 ms
2610:a1:1014::1 glueauthoritative20220202316.1 ms
pdns3.ultradns.orgparent + zone199.7.68.1 glueauthoritative20220202316.2 ms
2610:a1:1015::1 glueauthoritative20220202316.3 ms
pdns4.ultradns.orgparent + zone199.7.69.1 glueauthoritative202202023129 ms
2001:502:4612::1 glueauthoritative202202023129 ms
pdns5.ultradns.infoparent + zone204.74.114.1 glueauthoritative20220202316.1 ms
2610:a1:1016::1 glueauthoritative20220202316.3 ms
pdns6.ultradns.co.ukparent + zone204.74.115.1 glueauthoritative202202023116 ms
2610:a1:1017::1 glueauthoritative202202023116 ms

DNSSEC

1.a.0.0.0.1.6.2.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)
pdns1.ultradns.net
nameserver
204.74.108.1pdns1.ultradns.net ✓
2001:502:f3ff::1pdns1.ultradns.net ✓
pdns2.ultradns.net
nameserver
204.74.109.1pdns2.ultradns.net ✓
2610:a1:1014::1pdns2.ultradns.net ✓
pdns3.ultradns.org
nameserver
199.7.68.1pdns3.ultradns.org ✓
2610:a1:1015::1pdns3.ultradns.org ✓
pdns4.ultradns.org
nameserver
199.7.69.1pdns4.ultradns.org ✓
2001:502:4612::1pdns4.ultradns.org ✓
pdns5.ultradns.info
nameserver
204.74.114.1pdns5.ultradns.info ✓
2610:a1:1016::1pdns5.ultradns.info ✓
pdns6.ultradns.co.uk
nameserver
204.74.115.1pdns6.ultradns.co.uk ✓
2610:a1:1017::1pdns6.ultradns.co.uk ✓
dns-01.ultradns2.org
PTR target
204.74.120.1dns-01.ultradns2.org ✓
2610:a1:32d1::53dns-01.ultradns2.org ✓

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 1.1.1.1dns-01.ultradns2.org.
TTL 3600
Google 8.8.8.8dns-01.ultradns2.org.
TTL 3600
Quad9 9.9.9.9dns-01.ultradns2.org.
TTL 3600
OpenDNS 208.67.222.222dns-01.ultradns2.org.
TTL 3600

Text dump

; DNS report for 3.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.d.2.3.1.a.0.0.0.1.6.2.ip6.arpa (2610:a1:32d1::53)
; 2026-11-09 06:03:15 UTC, 108 queries in 1.15 s, zone 1.a.0.0.0.1.6.2.ip6.arpa

;; FINDINGS
;  [INFO] 1.a.0.0.0.1.6.2.ip6.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from pdns1.ultradns.net (204.74.108.1))
3.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.d.2.3.1.a.0.0.0.1.6.2.ip6.arpa.	3600	IN	PTR	dns-01.ultradns2.org.

;; TRACE
;  3.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.d.2.3.1.a.0.0.0.1.6.2.ip6.arpa PTR
;  . @h.root-servers.net (198.97.190.53) 6.2 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) 118 ms [NOERROR qr]: referral to 0.0.0.1.6.2.ip6.arpa.
0.0.0.1.6.2.ip6.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
0.0.0.1.6.2.ip6.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
0.0.0.1.6.2.ip6.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
0.0.0.1.6.2.ip6.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
0.0.0.1.6.2.ip6.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
0.0.0.1.6.2.ip6.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
0.0.0.1.6.2.ip6.arpa.	86400	IN	DS	51226 8 2 E27CD80F947A0F49D230EC67CC9750D18965B11481A1F746A28267B5D1B65874
;  0.0.0.1.6.2.ip6.arpa. @r.arin.net (199.180.180.63) 90 ms [NOERROR qr]: referral to 1.a.0.0.0.1.6.2.ip6.arpa.
1.a.0.0.0.1.6.2.ip6.arpa.		NS	pdns3.ultradns.org.	; 199.7.68.1 2610:a1:1015::1
1.a.0.0.0.1.6.2.ip6.arpa.		NS	pdns1.ultradns.net.	; 204.74.108.1 2001:502:f3ff::1
1.a.0.0.0.1.6.2.ip6.arpa.		NS	pdns5.ultradns.info.	; 204.74.114.1 2610:a1:1016::1
1.a.0.0.0.1.6.2.ip6.arpa.		NS	pdns6.ultradns.co.uk.	; 204.74.115.1 2610:a1:1017::1
1.a.0.0.0.1.6.2.ip6.arpa.		NS	pdns2.ultradns.net.	; 204.74.109.1 2610:a1:1014::1
1.a.0.0.0.1.6.2.ip6.arpa.		NS	pdns4.ultradns.org.	; 199.7.69.1 2001:502:4612::1
;  1.a.0.0.0.1.6.2.ip6.arpa. @pdns6.ultradns.co.uk (204.74.115.1) 16 ms [NOERROR qr aa]: answer
3.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.d.2.3.1.a.0.0.0.1.6.2.ip6.arpa.	3600	IN	PTR	dns-01.ultradns2.org.

;; NAMESERVERS (SOA asked of each address)
;  pdns1.ultradns.net [parent+zone]
;    204.74.108.1                            ok                        2022020231  5.7 ms
;    2001:502:f3ff::1                        ok                        2022020231  5.8 ms
;  pdns2.ultradns.net [parent+zone]
;    204.74.109.1                            ok                        2022020231  6.0 ms
;    2610:a1:1014::1                         ok                        2022020231  6.1 ms
;  pdns3.ultradns.org [parent+zone]
;    199.7.68.1                              ok                        2022020231  6.2 ms
;    2610:a1:1015::1                         ok                        2022020231  6.3 ms
;  pdns4.ultradns.org [parent+zone]
;    199.7.69.1                              ok                        2022020231  29 ms
;    2001:502:4612::1                        ok                        2022020231  29 ms
;  pdns5.ultradns.info [parent+zone]
;    204.74.114.1                            ok                        2022020231  6.1 ms
;    2610:a1:1016::1                         ok                        2022020231  6.3 ms
;  pdns6.ultradns.co.uk [parent+zone]
;    204.74.115.1                            ok                        2022020231  16 ms
;    2610:a1:1017::1                         ok                        2022020231  16 ms

;; DNSSEC: unsigned

;; HOSTS
;  pdns1.ultradns.net (nameserver)
;    204.74.108.1                            PTR pdns1.ultradns.net (confirmed)
;    2001:502:f3ff::1                        PTR pdns1.ultradns.net (confirmed)
;  pdns2.ultradns.net (nameserver)
;    204.74.109.1                            PTR pdns2.ultradns.net (confirmed)
;    2610:a1:1014::1                         PTR pdns2.ultradns.net (confirmed)
;  pdns3.ultradns.org (nameserver)
;    199.7.68.1                              PTR pdns3.ultradns.org (confirmed)
;    2610:a1:1015::1                         PTR pdns3.ultradns.org (confirmed)
;  pdns4.ultradns.org (nameserver)
;    199.7.69.1                              PTR pdns4.ultradns.org (confirmed)
;    2001:502:4612::1                        PTR pdns4.ultradns.org (confirmed)
;  pdns5.ultradns.info (nameserver)
;    204.74.114.1                            PTR pdns5.ultradns.info (confirmed)
;    2610:a1:1016::1                         PTR pdns5.ultradns.info (confirmed)
;  pdns6.ultradns.co.uk (nameserver)
;    204.74.115.1                            PTR pdns6.ultradns.co.uk (confirmed)
;    2610:a1:1017::1                         PTR pdns6.ultradns.co.uk (confirmed)
;  dns-01.ultradns2.org (PTR target)
;    204.74.120.1                            PTR dns-01.ultradns2.org (confirmed)
;    2610:a1:32d1::53                        PTR dns-01.ultradns2.org (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   dns-01.ultradns2.org.  ttl 3600
;  Google     PTR   dns-01.ultradns2.org.  ttl 3600
;  Quad9      PTR   dns-01.ultradns2.org.  ttl 3600
;  OpenDNS    PTR   dns-01.ultradns2.org.  ttl 3600