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.

2001:502:f3ff::10

0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa

Zone f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa124 queries in 0.8 s2026-11-09 06:03:13 UTCNot DNSSEC-signed

WHOIS for 2001:502:f3ff::10 →Text JSON

Warning The parent zone delegates to udns1.ultradns.net, udns2.ultradns.net but f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa itself lists pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk. Make the two lists match.
Note f.f.3.f.2.0.5.0.1.0.0.2.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

86400

PTR

u1.amazonaws.com.

ANY query: refused politely (RFC 8482)

3600

HINFO

"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

.asked f.root-servers.net 192.5.5.2416.4 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
ip6.arpa.asked a.ip6-servers.arpa 199.180.182.5394 ms
Referral to 5.0.1.0.0.2.ip6.arpa. signed (1 DS)
- r.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
- y.arin.net 192.82.134.30 2001:500:127::30
- x.arin.net 199.180.180.63 2001:500:f0::63
- u.arin.net 204.61.216.50 2001:500:14:6050:ad::1
No glue for r.arin.net, arin.authdns.ripe.net, z.arin.net, y.arin.net, x.arin.net, u.arin.net: addresses looked up via a resolver.
5.0.1.0.0.2.ip6.arpa.asked y.arin.net 192.82.134.306.5 ms
Referral to f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa. unsigned delegation
- udns1.ultradns.net 204.69.234.1 2001:502:f3ff::d
- udns2.ultradns.net 204.74.101.1 2610:a1:1014::d
No glue for udns1.ultradns.net, udns2.ultradns.net: addresses looked up via a resolver.
f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa.asked udns1.ultradns.net 204.69.234.16.0 ms
Answer (authoritative):
0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa. 86400 PTR u1.amazonaws.com.
204.74.101.1 failed: NOERROR

Nameservers

Every address of every nameserver, asked for f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa's SOA. "Parent" means the 5.0.1.0.0.2.ip6.arpa zone delegates to it; "zone" means f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa lists it itself.

Nameserver

Listed in

Address

Status

Serial

Time

pdns1.ultradns.net

zone

204.74.108.1

authoritative

2013031861

5.7 ms

2001:502:f3ff::1

authoritative

2013031861

5.8 ms

pdns2.ultradns.net

zone

204.74.109.1

authoritative

2013031861

6.2 ms

2610:a1:1014::1

authoritative

2013031861

6.5 ms

pdns3.ultradns.org

zone

199.7.68.1

authoritative

2013031861

6.7 ms

2610:a1:1015::1

authoritative

2013031861

6.9 ms

pdns4.ultradns.org

zone

199.7.69.1

authoritative

2013031861

30 ms

2001:502:4612::1

authoritative

2013031861

30 ms

pdns5.ultradns.info

zone

204.74.114.1

authoritative

2013031861

7.0 ms

2610:a1:1016::1

authoritative

2013031861

7.3 ms

pdns6.ultradns.co.uk

zone

204.74.115.1

authoritative

2013031861

17 ms

2610:a1:1017::1

authoritative

2013031861

18 ms

udns1.ultradns.net

parent

204.69.234.1 glue

authoritative

2013031861

7.4 ms

2001:502:f3ff::d glue

authoritative

2013031861

7.6 ms

udns2.ultradns.net

parent

204.74.101.1 glue

authoritative

2013031861

30 ms

2610:a1:1014::d glue

authoritative

2013031861

7.9 ms

DNSSEC

f.f.3.f.2.0.5.0.1.0.0.2.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.

Host

Address

Reverse DNS (PTR)

pdns1.ultradns.net

nameserver

204.74.108.1

pdns1.ultradns.net ✓

2001:502:f3ff::1

pdns1.ultradns.net ✓

pdns2.ultradns.net

nameserver

204.74.109.1

pdns2.ultradns.net ✓

2610:a1:1014::1

pdns2.ultradns.net ✓

pdns3.ultradns.org

nameserver

199.7.68.1

pdns3.ultradns.org ✓

2610:a1:1015::1

pdns3.ultradns.org ✓

pdns4.ultradns.org

nameserver

199.7.69.1

pdns4.ultradns.org ✓

2001:502:4612::1

pdns4.ultradns.org ✓

pdns5.ultradns.info

nameserver

204.74.114.1

pdns5.ultradns.info ✓

2610:a1:1016::1

pdns5.ultradns.info ✓

pdns6.ultradns.co.uk

nameserver

204.74.115.1

pdns6.ultradns.co.uk ✓

2610:a1:1017::1

pdns6.ultradns.co.uk ✓

udns1.ultradns.net

nameserver

204.69.234.1

udns1.ultradns.net ✓

2001:502:f3ff::d

udns1.ultradns.net ✓

udns2.ultradns.net

nameserver

204.74.101.1

udns2.ultradns.net ✓

2610:a1:1014::d

udns2.ultradns.net ✓

u1.amazonaws.com

PTR target

156.154.64.10

u1.amazonaws.com ✓

2001:502:f3ff::10

u1.amazonaws.com ✓

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.

Resolver

PTR

Cloudflare 1.1.1.1

u1.amazonaws.com.

TTL 86400

Google 8.8.8.8

u1.amazonaws.com.

TTL 21600

Quad9 9.9.9.9

u1.amazonaws.com.

TTL 43200

OpenDNS 208.67.222.222

u1.amazonaws.com.

TTL 86400

Text dump

; DNS report for 0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa (2001:502:f3ff::10)
; 2026-11-09 06:03:13 UTC, 124 queries in 0.82 s, zone f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa

;; FINDINGS
;  [WARN] The parent zone delegates to udns1.ultradns.net, udns2.ultradns.net but f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa itself lists pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk. Make the two lists match.
;  [INFO] f.f.3.f.2.0.5.0.1.0.0.2.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))
0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa.	86400	IN	PTR	u1.amazonaws.com.

;; TRACE
;  0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa PTR
;  . @f.root-servers.net (192.5.5.241) 6.4 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. @a.ip6-servers.arpa (199.180.182.53) 94 ms [NOERROR qr]: referral to 5.0.1.0.0.2.ip6.arpa.
5.0.1.0.0.2.ip6.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
5.0.1.0.0.2.ip6.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
5.0.1.0.0.2.ip6.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
5.0.1.0.0.2.ip6.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
5.0.1.0.0.2.ip6.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
5.0.1.0.0.2.ip6.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
5.0.1.0.0.2.ip6.arpa.	86400	IN	DS	54676 8 2 FC5F72BAB09F5AC9A30AF8B3B83230A54AE80D0130C2793AF4297C7E4E9D32C1
;  5.0.1.0.0.2.ip6.arpa. @y.arin.net (192.82.134.30) 6.5 ms [NOERROR qr]: referral to f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa.
f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa.		NS	udns1.ultradns.net.	; 204.69.234.1 2001:502:f3ff::d
f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa.		NS	udns2.ultradns.net.	; 204.74.101.1 2610:a1:1014::d
;  f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa. @udns1.ultradns.net (204.69.234.1) 6.0 ms [NOERROR qr aa]: answer
0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.f.3.f.2.0.5.0.1.0.0.2.ip6.arpa.	86400	IN	PTR	u1.amazonaws.com.

;; NAMESERVERS (SOA asked of each address)
;  pdns1.ultradns.net [zone]
;    204.74.108.1                            ok                        2013031861  5.7 ms
;    2001:502:f3ff::1                        ok                        2013031861  5.8 ms
;  pdns2.ultradns.net [zone]
;    204.74.109.1                            ok                        2013031861  6.2 ms
;    2610:a1:1014::1                         ok                        2013031861  6.5 ms
;  pdns3.ultradns.org [zone]
;    199.7.68.1                              ok                        2013031861  6.7 ms
;    2610:a1:1015::1                         ok                        2013031861  6.9 ms
;  pdns4.ultradns.org [zone]
;    199.7.69.1                              ok                        2013031861  30 ms
;    2001:502:4612::1                        ok                        2013031861  30 ms
;  pdns5.ultradns.info [zone]
;    204.74.114.1                            ok                        2013031861  7.0 ms
;    2610:a1:1016::1                         ok                        2013031861  7.3 ms
;  pdns6.ultradns.co.uk [zone]
;    204.74.115.1                            ok                        2013031861  17 ms
;    2610:a1:1017::1                         ok                        2013031861  18 ms
;  udns1.ultradns.net [parent]
;    204.69.234.1                            ok                        2013031861  7.4 ms
;    2001:502:f3ff::d                        ok                        2013031861  7.6 ms
;  udns2.ultradns.net [parent]
;    204.74.101.1                            ok                        2013031861  30 ms
;    2610:a1:1014::d                         ok                        2013031861  7.9 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)
;  udns1.ultradns.net (nameserver)
;    204.69.234.1                            PTR udns1.ultradns.net (confirmed)
;    2001:502:f3ff::d                        PTR udns1.ultradns.net (confirmed)
;  udns2.ultradns.net (nameserver)
;    204.74.101.1                            PTR udns2.ultradns.net (confirmed)
;    2610:a1:1014::d                         PTR udns2.ultradns.net (confirmed)
;  u1.amazonaws.com (PTR target)
;    156.154.64.10                           PTR u1.amazonaws.com (confirmed)
;    2001:502:f3ff::10                       PTR u1.amazonaws.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   u1.amazonaws.com.  ttl 86400
;  Google     PTR   u1.amazonaws.com.  ttl 21600
;  Quad9      PTR   u1.amazonaws.com.  ttl 43200
;  OpenDNS    PTR   u1.amazonaws.com.  ttl 86400