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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:a1:1015::1

1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.5.1.0.1.1.a.0.0.0.1.6.2.ip6.arpa

Zone 1.a.0.0.0.1.6.2.ip6.arpa105 queries in 1.9 s2026-11-09 06:03:17 UTCNot DNSSEC-signed

WHOIS for 2610:a1:1015::1 →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

86400PTRpdns3.ultradns.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 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
  2. ip6.arpa.asked b.ip6-servers.arpa 199.253.182.1826.2 ms

    Referral to 0.0.0.1.6.2.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. 0.0.0.1.6.2.ip6.arpa.asked u.arin.net 204.61.216.505.8 ms

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

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

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

  4. 1.a.0.0.0.1.6.2.ip6.arpa.asked pdns5.ultradns.info 204.74.114.16.5 ms

    Answer (authoritative):

    1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.5.1.0.1.1.a.0.0.0.1.6.2.ip6.arpa.86400PTRpdns3.ultradns.org.

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 glueauthoritative20220202315.6 ms
2001:502:f3ff::1 glueauthoritative20220202315.7 ms
pdns2.ultradns.netparent + zone204.74.109.1 glueauthoritative20220202315.8 ms
2610:a1:1014::1 glueauthoritative20220202316.2 ms
pdns3.ultradns.orgparent + zone199.7.68.1 glueauthoritative20220202316.0 ms
2610:a1:1015::1 glueauthoritative20220202316.4 ms
pdns4.ultradns.orgparent + zone199.7.69.1 glueauthoritative202202023129 ms
2001:502:4612::1 glueauthoritative202202023130 ms
pdns5.ultradns.infoparent + zone204.74.114.1 glueauthoritative20220202318.2 ms
2610:a1:1016::1 glueauthoritative20220202316.7 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 · PTR target
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 ✓

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 1.1.1.1pdns3.ultradns.org.
TTL 86400
Google 8.8.8.8pdns3.ultradns.org.
TTL 21600
Quad9 9.9.9.9timed out
OpenDNS 208.67.222.222pdns3.ultradns.org.
TTL 86400

Text dump

; DNS report for 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.5.1.0.1.1.a.0.0.0.1.6.2.ip6.arpa (2610:a1:1015::1)
; 2026-11-09 06:03:17 UTC, 105 queries in 1.92 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))
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.5.1.0.1.1.a.0.0.0.1.6.2.ip6.arpa.	86400	IN	PTR	pdns3.ultradns.org.

;; TRACE
;  1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.5.1.0.1.1.a.0.0.0.1.6.2.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 0.0.0.1.6.2.ip6.arpa.
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	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
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	y.arin.net.	; 192.82.134.30 2001:500:127::30
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.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
0.0.0.1.6.2.ip6.arpa.	86400	IN	DS	51226 8 2 E27CD80F947A0F49D230EC67CC9750D18965B11481A1F746A28267B5D1B65874
;  0.0.0.1.6.2.ip6.arpa. @u.arin.net (204.61.216.50) 5.8 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	pdns6.ultradns.co.uk.	; 204.74.115.1 2610:a1:1017::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.		NS	pdns2.ultradns.net.	; 204.74.109.1 2610:a1:1014::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	pdns3.ultradns.org.	; 199.7.68.1 2610:a1:1015::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. @pdns5.ultradns.info (204.74.114.1) 6.5 ms [NOERROR qr aa]: answer
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.5.1.0.1.1.a.0.0.0.1.6.2.ip6.arpa.	86400	IN	PTR	pdns3.ultradns.org.

;; NAMESERVERS (SOA asked of each address)
;  pdns1.ultradns.net [parent+zone]
;    204.74.108.1                            ok                        2022020231  5.6 ms
;    2001:502:f3ff::1                        ok                        2022020231  5.7 ms
;  pdns2.ultradns.net [parent+zone]
;    204.74.109.1                            ok                        2022020231  5.8 ms
;    2610:a1:1014::1                         ok                        2022020231  6.2 ms
;  pdns3.ultradns.org [parent+zone]
;    199.7.68.1                              ok                        2022020231  6.0 ms
;    2610:a1:1015::1                         ok                        2022020231  6.4 ms
;  pdns4.ultradns.org [parent+zone]
;    199.7.69.1                              ok                        2022020231  29 ms
;    2001:502:4612::1                        ok                        2022020231  30 ms
;  pdns5.ultradns.info [parent+zone]
;    204.74.114.1                            ok                        2022020231  8.2 ms
;    2610:a1:1016::1                         ok                        2022020231  6.7 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; PTR target)
;    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)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   pdns3.ultradns.org.  ttl 86400
;  Google     PTR   pdns3.ultradns.org.  ttl 21600
;  Quad9      PTR   timed out
;  OpenDNS    PTR   pdns3.ultradns.org.  ttl 86400