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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.

45.54.23.65

65.23.54.45.in-addr.arpa

Zone 23.54.45.in-addr.arpa140 queries in 1.0 s2026-11-09 06:11:07 UTCNot DNSSEC-signed

WHOIS for 45.54.23.65 →TextJSON
  • Warning The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.informaticadns.com, ns02.informaticadns.com, ns03.informaticadns.com, ns04.informaticadns.com but 23.54.45.in-addr.arpa itself lists dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.informaticadns.com, ns02.informaticadns.com, ns03.informaticadns.com, ns04.informaticadns.com. Make the two lists match.
  • Note 23.54.45.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

3600PTRns02.informaticadns.com.
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 e.root-servers.net 192.203.230.1034 ms

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

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

    192.33.4.12 failed: NOERROR

  2. in-addr.arpa.asked b.in-addr-servers.arpa 199.253.183.1836.0 ms

    Referral to 45.in-addr.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. 45.in-addr.arpa.asked u.arin.net 204.61.216.506.1 ms

    Referral to 23.54.45.in-addr.arpa. unsigned delegation

    • ns01.informaticadns.com 45.54.23.1
    • dns3.p01.nsone.net 198.51.44.65 2620:4d:4000:6259:7:1:0:3
    • ns03.informaticadns.com 45.54.23.129
    • dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2
    • dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
    • dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
    • ns02.informaticadns.com 45.54.23.65
    • ns04.informaticadns.com 45.54.23.193

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

  4. 23.54.45.in-addr.arpa.asked ns04.informaticadns.com 45.54.23.19390 ms

    Answer (authoritative):

    65.23.54.45.in-addr.arpa.3600PTRns02.informaticadns.com.

Nameservers

Every address of every nameserver, asked for 23.54.45.in-addr.arpa's SOA. "Parent" means the 45.in-addr.arpa zone delegates to it; "zone" means 23.54.45.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p01.nsone.netparent198.51.44.1 glueauthoritative157163059314 ms
2620:4d:4000:6259:7:1:0:1 glueauthoritative157163059314 ms
dns1.p03.nsone.netzone198.51.44.3authoritative157163059314 ms
2620:4d:4000:6259:7:3:0:1authoritative157163059314 ms
dns2.p01.nsone.netparent198.51.45.1 glueauthoritative157163059310 ms
2a00:edc0:6259:7:1::2 glueauthoritative157163059313 ms
dns2.p03.nsone.netzone198.51.45.3authoritative15716305936.2 ms
2a00:edc0:6259:7:3::2authoritative157163059313 ms
dns3.p01.nsone.netparent198.51.44.65 glueauthoritative157163059314 ms
2620:4d:4000:6259:7:1:0:3 glueauthoritative157163059313 ms
dns3.p03.nsone.netzone198.51.44.67authoritative157163059314 ms
2620:4d:4000:6259:7:3:0:3authoritative157163059313 ms
dns4.p01.nsone.netparent198.51.45.65 glueauthoritative15716305935.9 ms
2a00:edc0:6259:7:1::4 glueauthoritative157163059312 ms
dns4.p03.nsone.netzone198.51.45.67authoritative15716305936.1 ms
2a00:edc0:6259:7:3::4authoritative157163059313 ms
ns01.informaticadns.comparent + zone45.54.23.1 glueauthoritative157163059391 ms
ns02.informaticadns.comparent + zone45.54.23.65 glueauthoritative157163059391 ms
ns03.informaticadns.comparent + zone45.54.23.129 glueauthoritative157163059391 ms
ns04.informaticadns.comparent + zone45.54.23.193 glueauthoritative157163059392 ms

DNSSEC

23.54.45.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.p03.nsone.net
nameserver
198.51.44.3dns1.p03.nsone.net ✓
2620:4d:4000:6259:7:3:0:1dns1.p03.nsone.net ✓
dns2.p01.nsone.net
nameserver
198.51.45.1dns2.p01.nsone.net ✓
2a00:edc0:6259:7:1::2dns2.p01.nsone.net ✓
dns2.p03.nsone.net
nameserver
198.51.45.3dns2.p03.nsone.net ✓
2a00:edc0:6259:7:3::2dns2.p03.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.p03.nsone.net
nameserver
198.51.44.67dns3.p03.nsone.net ✓
2620:4d:4000:6259:7:3:0:3dns3.p03.nsone.net ✓
dns4.p01.nsone.net
nameserver
198.51.45.65dns4.p01.nsone.net ✓
2a00:edc0:6259:7:1::4dns4.p01.nsone.net ✓
dns4.p03.nsone.net
nameserver
198.51.45.67dns4.p03.nsone.net ✓
2a00:edc0:6259:7:3::4dns4.p03.nsone.net ✓
ns01.informaticadns.com
nameserver
45.54.23.1ns01.informaticadns.com ✓
ns02.informaticadns.com
nameserver · PTR target
45.54.23.65ns02.informaticadns.com ✓
ns03.informaticadns.com
nameserver
45.54.23.129ns03.informaticadns.com ✓
ns04.informaticadns.com
nameserver
45.54.23.193ns04.informaticadns.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.

ResolverPTR
Cloudflare 1.1.1.1ns02.informaticadns.com.
TTL 3600
Google 8.8.8.8ns02.informaticadns.com.
TTL 3600
Quad9 9.9.9.9ns02.informaticadns.com.
TTL 3600
OpenDNS 208.67.222.222ns02.informaticadns.com.
TTL 3600

Text dump

; DNS report for 65.23.54.45.in-addr.arpa (45.54.23.65)
; 2026-11-09 06:11:07 UTC, 140 queries in 0.97 s, zone 23.54.45.in-addr.arpa

;; FINDINGS
;  [WARN] The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.informaticadns.com, ns02.informaticadns.com, ns03.informaticadns.com, ns04.informaticadns.com but 23.54.45.in-addr.arpa itself lists dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.informaticadns.com, ns02.informaticadns.com, ns03.informaticadns.com, ns04.informaticadns.com. Make the two lists match.
;  [INFO] 23.54.45.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))
65.23.54.45.in-addr.arpa.	3600	IN	PTR	ns02.informaticadns.com.

;; TRACE
;  65.23.54.45.in-addr.arpa PTR
;  . @e.root-servers.net (192.203.230.10) 34 ms [NOERROR qr]: referral to in-addr.arpa.
in-addr.arpa.		NS	a.in-addr-servers.arpa.	; 199.180.182.53 2620:37:e000::53
in-addr.arpa.		NS	b.in-addr-servers.arpa.	; 199.253.183.183 2001:500:87::87
in-addr.arpa.		NS	c.in-addr-servers.arpa.	; 196.216.169.10 2001:43f8:110::10
in-addr.arpa.		NS	d.in-addr-servers.arpa.	; 200.10.60.53 2001:13c7:7010::53
in-addr.arpa.		NS	e.in-addr-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
in-addr.arpa.		NS	f.in-addr-servers.arpa.	; 193.0.9.1 2a13:27c0:30::1
in-addr.arpa.	86400	IN	DS	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
in-addr.arpa.	86400	IN	DS	53696 8 2 13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D424F04DF
in-addr.arpa.	86400	IN	DS	54956 8 2 E0E2BF5CFBD66572CA05EC18267D91509BA6A9405AF05C3FD4141DFA45200C08
in-addr.arpa.	86400	IN	DS	63982 8 2 AAF4FB5D213EF25AE44679032EBE3514C487D7ABD99D7F5FEC3383D030733C73
;  in-addr.arpa. @b.in-addr-servers.arpa (199.253.183.183) 6.0 ms [NOERROR qr]: referral to 45.in-addr.arpa.
45.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
45.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
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.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
45.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
45.in-addr.arpa.	86400	IN	DS	9136 8 2 97414863B7A0FDE713FB174990E9B43DE47467707010C01380743425EE6D146B
;  45.in-addr.arpa. @u.arin.net (204.61.216.50) 6.1 ms [NOERROR qr]: referral to 23.54.45.in-addr.arpa.
23.54.45.in-addr.arpa.		NS	ns01.informaticadns.com.	; 45.54.23.1
23.54.45.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
23.54.45.in-addr.arpa.		NS	ns03.informaticadns.com.	; 45.54.23.129
23.54.45.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
23.54.45.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
23.54.45.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
23.54.45.in-addr.arpa.		NS	ns02.informaticadns.com.	; 45.54.23.65
23.54.45.in-addr.arpa.		NS	ns04.informaticadns.com.	; 45.54.23.193
;  23.54.45.in-addr.arpa. @ns04.informaticadns.com (45.54.23.193) 90 ms [NOERROR qr aa]: answer
65.23.54.45.in-addr.arpa.	3600	IN	PTR	ns02.informaticadns.com.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             ok                        1571630593  14 ms
;    2620:4d:4000:6259:7:1:0:1               ok                        1571630593  14 ms
;  dns1.p03.nsone.net [zone]
;    198.51.44.3                             ok                        1571630593  14 ms
;    2620:4d:4000:6259:7:3:0:1               ok                        1571630593  14 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             ok                        1571630593  10 ms
;    2a00:edc0:6259:7:1::2                   ok                        1571630593  13 ms
;  dns2.p03.nsone.net [zone]
;    198.51.45.3                             ok                        1571630593  6.2 ms
;    2a00:edc0:6259:7:3::2                   ok                        1571630593  13 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            ok                        1571630593  14 ms
;    2620:4d:4000:6259:7:1:0:3               ok                        1571630593  13 ms
;  dns3.p03.nsone.net [zone]
;    198.51.44.67                            ok                        1571630593  14 ms
;    2620:4d:4000:6259:7:3:0:3               ok                        1571630593  13 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            ok                        1571630593  5.9 ms
;    2a00:edc0:6259:7:1::4                   ok                        1571630593  12 ms
;  dns4.p03.nsone.net [zone]
;    198.51.45.67                            ok                        1571630593  6.1 ms
;    2a00:edc0:6259:7:3::4                   ok                        1571630593  13 ms
;  ns01.informaticadns.com [parent+zone]
;    45.54.23.1                              ok                        1571630593  91 ms
;  ns02.informaticadns.com [parent+zone]
;    45.54.23.65                             ok                        1571630593  91 ms
;  ns03.informaticadns.com [parent+zone]
;    45.54.23.129                            ok                        1571630593  91 ms
;  ns04.informaticadns.com [parent+zone]
;    45.54.23.193                            ok                        1571630593  92 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.p03.nsone.net (nameserver)
;    198.51.44.3                             PTR dns1.p03.nsone.net (confirmed)
;    2620:4d:4000:6259:7:3:0:1               PTR dns1.p03.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.p03.nsone.net (nameserver)
;    198.51.45.3                             PTR dns2.p03.nsone.net (confirmed)
;    2a00:edc0:6259:7:3::2                   PTR dns2.p03.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.p03.nsone.net (nameserver)
;    198.51.44.67                            PTR dns3.p03.nsone.net (confirmed)
;    2620:4d:4000:6259:7:3:0:3               PTR dns3.p03.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.p03.nsone.net (nameserver)
;    198.51.45.67                            PTR dns4.p03.nsone.net (confirmed)
;    2a00:edc0:6259:7:3::4                   PTR dns4.p03.nsone.net (confirmed)
;  ns01.informaticadns.com (nameserver)
;    45.54.23.1                              PTR ns01.informaticadns.com (confirmed)
;  ns02.informaticadns.com (nameserver; PTR target)
;    45.54.23.65                             PTR ns02.informaticadns.com (confirmed)
;  ns03.informaticadns.com (nameserver)
;    45.54.23.129                            PTR ns03.informaticadns.com (confirmed)
;  ns04.informaticadns.com (nameserver)
;    45.54.23.193                            PTR ns04.informaticadns.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   ns02.informaticadns.com.  ttl 3600
;  Google     PTR   ns02.informaticadns.com.  ttl 3600
;  Quad9      PTR   ns02.informaticadns.com.  ttl 3600
;  OpenDNS    PTR   ns02.informaticadns.com.  ttl 3600