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.

45.54.21.1

1.21.54.45.in-addr.arpa

Zone 21.54.45.in-addr.arpa143 queries in 1.6 s2026-11-09 05:55:00 UTCNot DNSSEC-signed

WHOIS for 45.54.21.1 →Text JSON

Warning ns01.cheesydns.com (45.54.21.1) answers REFUSED for 21.54.45.in-addr.arpa.
Warning ns02.cheesydns.com (45.54.21.65) answers REFUSED for 21.54.45.in-addr.arpa.
Warning ns03.cheesydns.com (45.54.21.129) answers REFUSED for 21.54.45.in-addr.arpa.
Warning ns04.cheesydns.com (45.54.21.193) answers REFUSED for 21.54.45.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.cheesydns.com, ns02.cheesydns.com, ns03.cheesydns.com, ns04.cheesydns.com but 21.54.45.in-addr.arpa itself lists dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net. Make the two lists match.
Note 21.54.45.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

3600

PTR

ns01.cheesydns.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 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
193.0.14.129 failed: NOERROR
in-addr.arpa.asked d.in-addr-servers.arpa 200.10.60.53117 ms
Referral to 45.in-addr.arpa. signed (1 DS)
- r.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
- u.arin.net 204.61.216.50 2001:500:14:6050:ad::1
- x.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, y.arin.net, z.arin.net, u.arin.net, x.arin.net, arin.authdns.ripe.net: addresses looked up via a resolver.
45.in-addr.arpa.asked y.arin.net 192.82.134.306.3 ms
Referral to 21.54.45.in-addr.arpa. unsigned delegation
- ns01.cheesydns.com 45.54.21.1
- ns03.cheesydns.com 45.54.21.129
- dns3.p01.nsone.net 198.51.44.65 2620:4d:4000:6259:7:1:0:3
- dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
- ns04.cheesydns.com 45.54.21.193
- dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
- ns02.cheesydns.com 45.54.21.65
- dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2
No glue for ns01.cheesydns.com, ns03.cheesydns.com, dns3.p01.nsone.net, dns1.p01.nsone.net, ns04.cheesydns.com, dns4.p01.nsone.net, ns02.cheesydns.com, dns2.p01.nsone.net: addresses looked up via a resolver.
21.54.45.in-addr.arpa.asked dns4.p01.nsone.net 198.51.45.655.8 ms
Answer (authoritative):
1.21.54.45.in-addr.arpa. 3600 PTR ns01.cheesydns.com.
45.54.21.65 failed: REFUSED

Nameservers

Every address of every nameserver, asked for 21.54.45.in-addr.arpa's SOA. "Parent" means the 45.in-addr.arpa zone delegates to it; "zone" means 21.54.45.in-addr.arpa lists it itself.

Nameserver

Listed in

Address

Status

Serial

Time

dns1.p01.nsone.net

parent

198.51.44.1 glue

authoritative

1657772435

17 ms

2620:4d:4000:6259:7:1:0:1 glue

authoritative

1657772435

14 ms

dns1.p08.nsone.net

zone

198.51.44.8

authoritative

1657772435

13 ms

2620:4d:4000:6259:7:8:0:1

authoritative

1657772435

14 ms

dns2.p01.nsone.net

parent

198.51.45.1 glue

authoritative

1657772435

6.2 ms

2a00:edc0:6259:7:1::2 glue

authoritative

1657772435

13 ms

dns2.p08.nsone.net

zone

198.51.45.8

authoritative

1657772435

6.3 ms

2a00:edc0:6259:7:8::2

authoritative

1657772435

13 ms

dns3.p01.nsone.net

parent

198.51.44.65 glue

authoritative

1657772435

14 ms

2620:4d:4000:6259:7:1:0:3 glue

authoritative

1657772435

18 ms

dns3.p08.nsone.net

zone

198.51.44.72

authoritative

1657772435

14 ms

2620:4d:4000:6259:7:8:0:3

authoritative

1657772435

14 ms

dns4.p01.nsone.net

parent

198.51.45.65 glue

authoritative

1657772435

6.1 ms

2a00:edc0:6259:7:1::4 glue

authoritative

1657772435

12 ms

dns4.p08.nsone.net

zone

198.51.45.72

authoritative

1657772435

6.1 ms

2a00:edc0:6259:7:8::4

authoritative

1657772435

13 ms

ns01.cheesydns.com

parent

45.54.21.1 glue

REFUSED

92 ms

ns02.cheesydns.com

parent

45.54.21.65 glue

REFUSED

92 ms

ns03.cheesydns.com

parent

45.54.21.129 glue

REFUSED

100 ms

ns04.cheesydns.com

parent

45.54.21.193 glue

REFUSED

93 ms

DNSSEC

21.54.45.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.

Host

Address

Reverse DNS (PTR)

dns1.p01.nsone.net

nameserver

198.51.44.1

dns1.p01.nsone.net ✓

2620:4d:4000:6259:7:1:0:1

dns1.p01.nsone.net ✓

dns1.p08.nsone.net

nameserver

198.51.44.8

ns8.demysdns.com, dns1.p08.nsone.net ✓

2620:4d:4000:6259:7:8:0:1

dns1.p08.nsone.net, ns8.demysdns.com ✓

dns2.p01.nsone.net

nameserver

198.51.45.1

dns2.p01.nsone.net ✓

2a00:edc0:6259:7:1::2

dns2.p01.nsone.net ✓

dns2.p08.nsone.net

nameserver

198.51.45.8

dns2.p08.nsone.net ✓

2a00:edc0:6259:7:8::2

dns2.p08.nsone.net ✓

dns3.p01.nsone.net

nameserver

198.51.44.65

dns3.p01.nsone.net ✓

2620:4d:4000:6259:7:1:0:3

dns3.p01.nsone.net ✓

dns3.p08.nsone.net

nameserver

198.51.44.72

dns3.p08.nsone.net ✓

2620:4d:4000:6259:7:8:0:3

dns3.p08.nsone.net ✓

dns4.p01.nsone.net

nameserver

198.51.45.65

dns4.p01.nsone.net ✓

2a00:edc0:6259:7:1::4

dns4.p01.nsone.net ✓

dns4.p08.nsone.net

nameserver

198.51.45.72

dns4.p08.nsone.net ✓

2a00:edc0:6259:7:8::4

dns4.p08.nsone.net ✓

ns01.cheesydns.com

nameserver · PTR target

45.54.21.1

ns01.cheesydns.com ✓

ns02.cheesydns.com

nameserver

45.54.21.65

ns02.cheesydns.com ✓

ns03.cheesydns.com

nameserver

45.54.21.129

ns03.cheesydns.com ✓

ns04.cheesydns.com

nameserver

45.54.21.193

ns04.cheesydns.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

ns01.cheesydns.com.

TTL 3600

Google 8.8.8.8

ns01.cheesydns.com.

TTL 3600

Quad9 9.9.9.9

ns01.cheesydns.com.

TTL 3600

OpenDNS 208.67.222.222

ns01.cheesydns.com.

TTL 3600

Text dump

; DNS report for 1.21.54.45.in-addr.arpa (45.54.21.1)
; 2026-11-09 05:55:00 UTC, 143 queries in 1.62 s, zone 21.54.45.in-addr.arpa

;; FINDINGS
;  [WARN] ns01.cheesydns.com (45.54.21.1) answers REFUSED for 21.54.45.in-addr.arpa.
;  [WARN] ns02.cheesydns.com (45.54.21.65) answers REFUSED for 21.54.45.in-addr.arpa.
;  [WARN] ns03.cheesydns.com (45.54.21.129) answers REFUSED for 21.54.45.in-addr.arpa.
;  [WARN] ns04.cheesydns.com (45.54.21.193) answers REFUSED for 21.54.45.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.cheesydns.com, ns02.cheesydns.com, ns03.cheesydns.com, ns04.cheesydns.com but 21.54.45.in-addr.arpa itself lists dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net. Make the two lists match.
;  [INFO] 21.54.45.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))
1.21.54.45.in-addr.arpa.	3600	IN	PTR	ns01.cheesydns.com.

;; TRACE
;  1.21.54.45.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. @d.in-addr-servers.arpa (200.10.60.53) 117 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	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	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	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. @y.arin.net (192.82.134.30) 6.3 ms [NOERROR qr]: referral to 21.54.45.in-addr.arpa.
21.54.45.in-addr.arpa.		NS	ns01.cheesydns.com.	; 45.54.21.1
21.54.45.in-addr.arpa.		NS	ns03.cheesydns.com.	; 45.54.21.129
21.54.45.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
21.54.45.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
21.54.45.in-addr.arpa.		NS	ns04.cheesydns.com.	; 45.54.21.193
21.54.45.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
21.54.45.in-addr.arpa.		NS	ns02.cheesydns.com.	; 45.54.21.65
21.54.45.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
;  21.54.45.in-addr.arpa. @dns4.p01.nsone.net (198.51.45.65) 5.8 ms [NOERROR qr aa]: answer
1.21.54.45.in-addr.arpa.	3600	IN	PTR	ns01.cheesydns.com.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             ok                        1657772435  17 ms
;    2620:4d:4000:6259:7:1:0:1               ok                        1657772435  14 ms
;  dns1.p08.nsone.net [zone]
;    198.51.44.8                             ok                        1657772435  13 ms
;    2620:4d:4000:6259:7:8:0:1               ok                        1657772435  14 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             ok                        1657772435  6.2 ms
;    2a00:edc0:6259:7:1::2                   ok                        1657772435  13 ms
;  dns2.p08.nsone.net [zone]
;    198.51.45.8                             ok                        1657772435  6.3 ms
;    2a00:edc0:6259:7:8::2                   ok                        1657772435  13 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            ok                        1657772435  14 ms
;    2620:4d:4000:6259:7:1:0:3               ok                        1657772435  18 ms
;  dns3.p08.nsone.net [zone]
;    198.51.44.72                            ok                        1657772435  14 ms
;    2620:4d:4000:6259:7:8:0:3               ok                        1657772435  14 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            ok                        1657772435  6.1 ms
;    2a00:edc0:6259:7:1::4                   ok                        1657772435  12 ms
;  dns4.p08.nsone.net [zone]
;    198.51.45.72                            ok                        1657772435  6.1 ms
;    2a00:edc0:6259:7:8::4                   ok                        1657772435  13 ms
;  ns01.cheesydns.com [parent]
;    45.54.21.1                              REFUSED                               92 ms
;  ns02.cheesydns.com [parent]
;    45.54.21.65                             REFUSED                               92 ms
;  ns03.cheesydns.com [parent]
;    45.54.21.129                            REFUSED                               100 ms
;  ns04.cheesydns.com [parent]
;    45.54.21.193                            REFUSED                               93 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.p08.nsone.net (nameserver)
;    198.51.44.8                             PTR ns8.demysdns.com, dns1.p08.nsone.net (confirmed)
;    2620:4d:4000:6259:7:8:0:1               PTR dns1.p08.nsone.net, ns8.demysdns.com (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.p08.nsone.net (nameserver)
;    198.51.45.8                             PTR dns2.p08.nsone.net (confirmed)
;    2a00:edc0:6259:7:8::2                   PTR dns2.p08.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.p08.nsone.net (nameserver)
;    198.51.44.72                            PTR dns3.p08.nsone.net (confirmed)
;    2620:4d:4000:6259:7:8:0:3               PTR dns3.p08.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.p08.nsone.net (nameserver)
;    198.51.45.72                            PTR dns4.p08.nsone.net (confirmed)
;    2a00:edc0:6259:7:8::4                   PTR dns4.p08.nsone.net (confirmed)
;  ns01.cheesydns.com (nameserver; PTR target)
;    45.54.21.1                              PTR ns01.cheesydns.com (confirmed)
;  ns02.cheesydns.com (nameserver)
;    45.54.21.65                             PTR ns02.cheesydns.com (confirmed)
;  ns03.cheesydns.com (nameserver)
;    45.54.21.129                            PTR ns03.cheesydns.com (confirmed)
;  ns04.cheesydns.com (nameserver)
;    45.54.21.193                            PTR ns04.cheesydns.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   ns01.cheesydns.com.  ttl 3600
;  Google     PTR   ns01.cheesydns.com.  ttl 3600
;  Quad9      PTR   ns01.cheesydns.com.  ttl 3600
;  OpenDNS    PTR   ns01.cheesydns.com.  ttl 3600