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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.

45.54.92.129

129.92.54.45.in-addr.arpa

Zone 92.54.45.in-addr.arpa152 queries in 1.4 s2026-11-09 06:11:06 UTCNot DNSSEC-signed

WHOIS for 45.54.92.129 →TextJSON
  • Warning ns01.herokudns.net (45.54.92.1) answers REFUSED for 92.54.45.in-addr.arpa.
  • Warning ns01.herokudns.net (2607:f740:e651::1) answers REFUSED for 92.54.45.in-addr.arpa.
  • Warning ns02.herokudns.net (45.54.92.65) answers REFUSED for 92.54.45.in-addr.arpa.
  • Warning ns02.herokudns.net (2607:f740:e651:4::1) answers REFUSED for 92.54.45.in-addr.arpa.
  • Warning ns03.herokudns.net (45.54.92.129) answers REFUSED for 92.54.45.in-addr.arpa.
  • Warning ns03.herokudns.net (2607:f740:e651:8::1) answers REFUSED for 92.54.45.in-addr.arpa.
  • Warning ns04.herokudns.net (45.54.92.193) answers REFUSED for 92.54.45.in-addr.arpa.
  • Warning ns04.herokudns.net (2607:f740:e651:c::1) answers REFUSED for 92.54.45.in-addr.arpa.
  • Warning The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.herokudns.net, ns02.herokudns.net, ns03.herokudns.net, ns04.herokudns.net but 92.54.45.in-addr.arpa itself lists dns1.p06.nsone.net, dns2.p06.nsone.net, dns3.p06.nsone.net, dns4.p06.nsone.net. Make the two lists match.
  • Note 92.54.45.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of dns4.p01.nsone.net (198.51.45.65), an authoritative server: no cache in between, so these are the live values.

PTR Reverse pointer

3600PTRns03.herokudns.net.
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 i.root-servers.net 192.36.148.176.3 ms

    Referral to in-addr.arpa. signed (4 DS)

    • c.in-addr-servers.arpa 196.216.169.10 2001:43f8:110::10
    • e.in-addr-servers.arpa 203.119.86.101 2001:dd8:6::101
    • a.in-addr-servers.arpa 199.180.182.53 2620:37:e000::53
    • f.in-addr-servers.arpa 193.0.9.1 2a13:27c0:30::1
    • b.in-addr-servers.arpa 199.253.183.183 2001:500:87::87
    • d.in-addr-servers.arpa 200.10.60.53 2001:13c7:7010::53

    192.5.5.241 failed: NOERROR

  2. in-addr.arpa.asked a.in-addr-servers.arpa 199.180.182.5390 ms

    Referral to 45.in-addr.arpa. signed (1 DS)

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

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

    203.119.86.101 failed: NOERROR

  3. 45.in-addr.arpa.asked u.arin.net 204.61.216.506.9 ms

    Referral to 92.54.45.in-addr.arpa. unsigned delegation

    • ns02.herokudns.net 45.54.92.65 2607:f740:e651:4::1
    • ns01.herokudns.net 45.54.92.1 2607:f740:e651::1
    • dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
    • dns3.p01.nsone.net 198.51.44.65 2620:4d:4000:6259:7:1:0:3
    • dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
    • dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2
    • ns04.herokudns.net 45.54.92.193 2607:f740:e651:c::1
    • ns03.herokudns.net 45.54.92.129 2607:f740:e651:8::1

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

    193.0.9.10 failed: NOERROR

  4. 92.54.45.in-addr.arpa.asked dns1.p01.nsone.net 198.51.44.115 ms

    Answer (authoritative):

    129.92.54.45.in-addr.arpa.3600PTRns03.herokudns.net.

    45.54.92.1 failed: REFUSED

Nameservers

Every address of every nameserver, asked for 92.54.45.in-addr.arpa's SOA. "Parent" means the 45.in-addr.arpa zone delegates to it; "zone" means 92.54.45.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p01.nsone.netparent198.51.44.1 glueauthoritative166383619815 ms
2620:4d:4000:6259:7:1:0:1 glueauthoritative166383619814 ms
dns1.p06.nsone.netzone198.51.44.6authoritative166383619816 ms
2620:4d:4000:6259:7:6:0:1authoritative166383619816 ms
dns2.p01.nsone.netparent198.51.45.1 glueauthoritative16638361987.2 ms
2a00:edc0:6259:7:1::2 glueauthoritative166383619813 ms
dns2.p06.nsone.netzone198.51.45.6authoritative16638361986.9 ms
2a00:edc0:6259:7:6::2authoritative166383619815 ms
dns3.p01.nsone.netparent198.51.44.65 glueauthoritative166383619818 ms
2620:4d:4000:6259:7:1:0:3 glueauthoritative166383619815 ms
dns3.p06.nsone.netzone198.51.44.70authoritative166383619815 ms
2620:4d:4000:6259:7:6:0:3authoritative166383619814 ms
dns4.p01.nsone.netparent198.51.45.65 glueauthoritative16638361986.7 ms
2a00:edc0:6259:7:1::4 glueauthoritative166383619813 ms
dns4.p06.nsone.netzone198.51.45.70authoritative16638361988.1 ms
2a00:edc0:6259:7:6::4authoritative166383619813 ms
ns01.herokudns.netparent45.54.92.1 glueREFUSED16 ms
2607:f740:e651::1 glueREFUSED16 ms
ns02.herokudns.netparent45.54.92.65 glueREFUSED17 ms
2607:f740:e651:4::1 glueREFUSED16 ms
ns03.herokudns.netparent45.54.92.129 glueREFUSED16 ms
2607:f740:e651:8::1 glueREFUSED16 ms
ns04.herokudns.netparent45.54.92.193 glueREFUSED16 ms
2607:f740:e651:c::1 glueREFUSED17 ms

DNSSEC

92.54.45.in-addr.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 ✓
dns1.p06.nsone.net
nameserver
198.51.44.6dns1.p06.nsone.net ✓
2620:4d:4000:6259:7:6:0:1dns1.p06.nsone.net ✓
dns2.p01.nsone.net
nameserver
198.51.45.1dns2.p01.nsone.net ✓
2a00:edc0:6259:7:1::2dns2.p01.nsone.net ✓
dns2.p06.nsone.net
nameserver
198.51.45.6dns2.p06.nsone.net ✓
2a00:edc0:6259:7:6::2dns2.p06.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 ✓
dns3.p06.nsone.net
nameserver
198.51.44.70dns3.p06.nsone.net ✓
2620:4d:4000:6259:7:6:0:3dns3.p06.nsone.net ✓
dns4.p01.nsone.net
nameserver
198.51.45.65dns4.p01.nsone.net ✓
2a00:edc0:6259:7:1::4dns4.p01.nsone.net ✓
dns4.p06.nsone.net
nameserver
198.51.45.70dns4.p06.nsone.net ✓
2a00:edc0:6259:7:6::4dns4.p06.nsone.net ✓
ns01.herokudns.net
nameserver
45.54.92.1ns01.herokudns.net ✓
2607:f740:e651::1ns01.herokudns.net ✓
ns02.herokudns.net
nameserver
45.54.92.65ns02.herokudns.net ✓
2607:f740:e651:4::1ns02.herokudns.net ✓
ns03.herokudns.net
nameserver · PTR target
45.54.92.129ns03.herokudns.net ✓
2607:f740:e651:8::1ns03.herokudns.net ✓
ns04.herokudns.net
nameserver
45.54.92.193ns04.herokudns.net ✓
2607:f740:e651:c::1ns04.herokudns.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 1.1.1.1ns03.herokudns.net.
TTL 3600
Google 8.8.8.8ns03.herokudns.net.
TTL 3600
Quad9 9.9.9.9ns03.herokudns.net.
TTL 3600
OpenDNS 208.67.222.222ns03.herokudns.net.
TTL 3600

Text dump

; DNS report for 129.92.54.45.in-addr.arpa (45.54.92.129)
; 2026-11-09 06:11:06 UTC, 152 queries in 1.39 s, zone 92.54.45.in-addr.arpa

;; FINDINGS
;  [WARN] ns01.herokudns.net (45.54.92.1) answers REFUSED for 92.54.45.in-addr.arpa.
;  [WARN] ns01.herokudns.net (2607:f740:e651::1) answers REFUSED for 92.54.45.in-addr.arpa.
;  [WARN] ns02.herokudns.net (45.54.92.65) answers REFUSED for 92.54.45.in-addr.arpa.
;  [WARN] ns02.herokudns.net (2607:f740:e651:4::1) answers REFUSED for 92.54.45.in-addr.arpa.
;  [WARN] ns03.herokudns.net (45.54.92.129) answers REFUSED for 92.54.45.in-addr.arpa.
;  [WARN] ns03.herokudns.net (2607:f740:e651:8::1) answers REFUSED for 92.54.45.in-addr.arpa.
;  [WARN] ns04.herokudns.net (45.54.92.193) answers REFUSED for 92.54.45.in-addr.arpa.
;  [WARN] ns04.herokudns.net (2607:f740:e651:c::1) answers REFUSED for 92.54.45.in-addr.arpa.
;  [WARN] The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.herokudns.net, ns02.herokudns.net, ns03.herokudns.net, ns04.herokudns.net but 92.54.45.in-addr.arpa itself lists dns1.p06.nsone.net, dns2.p06.nsone.net, dns3.p06.nsone.net, dns4.p06.nsone.net. Make the two lists match.
;  [INFO] 92.54.45.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from dns4.p01.nsone.net (198.51.45.65))
129.92.54.45.in-addr.arpa.	3600	IN	PTR	ns03.herokudns.net.

;; TRACE
;  129.92.54.45.in-addr.arpa PTR
;  . @i.root-servers.net (192.36.148.17) 6.3 ms [NOERROR qr]: referral to in-addr.arpa.
in-addr.arpa.		NS	c.in-addr-servers.arpa.	; 196.216.169.10 2001:43f8:110::10
in-addr.arpa.		NS	e.in-addr-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
in-addr.arpa.		NS	a.in-addr-servers.arpa.	; 199.180.182.53 2620:37:e000::53
in-addr.arpa.		NS	f.in-addr-servers.arpa.	; 193.0.9.1 2a13:27c0:30::1
in-addr.arpa.		NS	b.in-addr-servers.arpa.	; 199.253.183.183 2001:500:87::87
in-addr.arpa.		NS	d.in-addr-servers.arpa.	; 200.10.60.53 2001:13c7:7010::53
in-addr.arpa.	86400	IN	DS	53696 8 2 13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D424F04DF
in-addr.arpa.	86400	IN	DS	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
in-addr.arpa.	86400	IN	DS	63982 8 2 AAF4FB5D213EF25AE44679032EBE3514C487D7ABD99D7F5FEC3383D030733C73
in-addr.arpa.	86400	IN	DS	54956 8 2 E0E2BF5CFBD66572CA05EC18267D91509BA6A9405AF05C3FD4141DFA45200C08
;  in-addr.arpa. @a.in-addr-servers.arpa (199.180.182.53) 90 ms [NOERROR qr]: referral to 45.in-addr.arpa.
45.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
45.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
45.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
45.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
45.in-addr.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
45.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
45.in-addr.arpa.	86400	IN	DS	9136 8 2 97414863B7A0FDE713FB174990E9B43DE47467707010C01380743425EE6D146B
;  45.in-addr.arpa. @u.arin.net (204.61.216.50) 6.9 ms [NOERROR qr]: referral to 92.54.45.in-addr.arpa.
92.54.45.in-addr.arpa.		NS	ns02.herokudns.net.	; 45.54.92.65 2607:f740:e651:4::1
92.54.45.in-addr.arpa.		NS	ns01.herokudns.net.	; 45.54.92.1 2607:f740:e651::1
92.54.45.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
92.54.45.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
92.54.45.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
92.54.45.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
92.54.45.in-addr.arpa.		NS	ns04.herokudns.net.	; 45.54.92.193 2607:f740:e651:c::1
92.54.45.in-addr.arpa.		NS	ns03.herokudns.net.	; 45.54.92.129 2607:f740:e651:8::1
;  92.54.45.in-addr.arpa. @dns1.p01.nsone.net (198.51.44.1) 15 ms [NOERROR qr aa]: answer
129.92.54.45.in-addr.arpa.	3600	IN	PTR	ns03.herokudns.net.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             ok                        1663836198  15 ms
;    2620:4d:4000:6259:7:1:0:1               ok                        1663836198  14 ms
;  dns1.p06.nsone.net [zone]
;    198.51.44.6                             ok                        1663836198  16 ms
;    2620:4d:4000:6259:7:6:0:1               ok                        1663836198  16 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             ok                        1663836198  7.2 ms
;    2a00:edc0:6259:7:1::2                   ok                        1663836198  13 ms
;  dns2.p06.nsone.net [zone]
;    198.51.45.6                             ok                        1663836198  6.9 ms
;    2a00:edc0:6259:7:6::2                   ok                        1663836198  15 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            ok                        1663836198  18 ms
;    2620:4d:4000:6259:7:1:0:3               ok                        1663836198  15 ms
;  dns3.p06.nsone.net [zone]
;    198.51.44.70                            ok                        1663836198  15 ms
;    2620:4d:4000:6259:7:6:0:3               ok                        1663836198  14 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            ok                        1663836198  6.7 ms
;    2a00:edc0:6259:7:1::4                   ok                        1663836198  13 ms
;  dns4.p06.nsone.net [zone]
;    198.51.45.70                            ok                        1663836198  8.1 ms
;    2a00:edc0:6259:7:6::4                   ok                        1663836198  13 ms
;  ns01.herokudns.net [parent]
;    45.54.92.1                              REFUSED                               16 ms
;    2607:f740:e651::1                       REFUSED                               16 ms
;  ns02.herokudns.net [parent]
;    45.54.92.65                             REFUSED                               17 ms
;    2607:f740:e651:4::1                     REFUSED                               16 ms
;  ns03.herokudns.net [parent]
;    45.54.92.129                            REFUSED                               16 ms
;    2607:f740:e651:8::1                     REFUSED                               16 ms
;  ns04.herokudns.net [parent]
;    45.54.92.193                            REFUSED                               16 ms
;    2607:f740:e651:c::1                     REFUSED                               17 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)
;  dns1.p06.nsone.net (nameserver)
;    198.51.44.6                             PTR dns1.p06.nsone.net (confirmed)
;    2620:4d:4000:6259:7:6:0:1               PTR dns1.p06.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)
;  dns2.p06.nsone.net (nameserver)
;    198.51.45.6                             PTR dns2.p06.nsone.net (confirmed)
;    2a00:edc0:6259:7:6::2                   PTR dns2.p06.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)
;  dns3.p06.nsone.net (nameserver)
;    198.51.44.70                            PTR dns3.p06.nsone.net (confirmed)
;    2620:4d:4000:6259:7:6:0:3               PTR dns3.p06.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)
;  dns4.p06.nsone.net (nameserver)
;    198.51.45.70                            PTR dns4.p06.nsone.net (confirmed)
;    2a00:edc0:6259:7:6::4                   PTR dns4.p06.nsone.net (confirmed)
;  ns01.herokudns.net (nameserver)
;    45.54.92.1                              PTR ns01.herokudns.net (confirmed)
;    2607:f740:e651::1                       PTR ns01.herokudns.net (confirmed)
;  ns02.herokudns.net (nameserver)
;    45.54.92.65                             PTR ns02.herokudns.net (confirmed)
;    2607:f740:e651:4::1                     PTR ns02.herokudns.net (confirmed)
;  ns03.herokudns.net (nameserver; PTR target)
;    45.54.92.129                            PTR ns03.herokudns.net (confirmed)
;    2607:f740:e651:8::1                     PTR ns03.herokudns.net (confirmed)
;  ns04.herokudns.net (nameserver)
;    45.54.92.193                            PTR ns04.herokudns.net (confirmed)
;    2607:f740:e651:c::1                     PTR ns04.herokudns.net (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   ns03.herokudns.net.  ttl 3600
;  Google     PTR   ns03.herokudns.net.  ttl 3600
;  Quad9      PTR   ns03.herokudns.net.  ttl 3600
;  OpenDNS    PTR   ns03.herokudns.net.  ttl 3600