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.

198.51.44.66

66.44.51.198.in-addr.arpa

Zone 44.51.198.in-addr.arpa94 queries in 0.5 s2026-11-09 06:11:27 UTCDNSSEC signed

WHOIS for 198.51.44.66 →Text JSON

No problems found.

Records

Asked directly of dns2.p01.nsone.net (198.51.45.1), an authoritative server: no cache in between, so these are the live values. Each set is DNSSEC-signed.

PTR Reverse pointer

3600

PTR

dns3.p02.nsone.net.

ANY query: 1 records

NSEC

\000.66.44.51.198.in-addr.arpa. PTR RRSIG NSEC

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 l.root-servers.net 199.7.83.426.0 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
192.5.5.241 failed: NOERROR
in-addr.arpa.asked a.in-addr-servers.arpa 199.180.182.5392 ms
Referral to 198.in-addr.arpa. signed (1 DS)
- x.arin.net 199.180.180.63 2001:500:f0::63
- arin.authdns.ripe.net 193.0.9.10 2a13:27c0:30::10
- r.arin.net 199.180.180.63 2001:500:f0::63
- u.arin.net 204.61.216.50 2001:500:14:6050:ad::1
- z.arin.net 199.180.180.63 2001:500:f0::63
- y.arin.net 192.82.134.30 2001:500:127::30
No glue for x.arin.net, arin.authdns.ripe.net, r.arin.net, u.arin.net, z.arin.net, y.arin.net: addresses looked up via a resolver.
200.10.60.53 failed: NOERROR
198.in-addr.arpa.asked arin.authdns.ripe.net 193.0.9.1011 ms
Referral to 44.51.198.in-addr.arpa. signed (1 DS)
- dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
- dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2
- 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
No glue for dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net: addresses looked up via a resolver.
44.51.198.in-addr.arpa.asked dns2.p01.nsone.net 198.51.45.16.0 ms
Answer (authoritative):
66.44.51.198.in-addr.arpa. 3600 PTR dns3.p02.nsone.net.

Nameservers

Every address of every nameserver, asked for 44.51.198.in-addr.arpa's SOA. "Parent" means the 198.in-addr.arpa zone delegates to it; "zone" means 44.51.198.in-addr.arpa lists it itself.

Nameserver

Listed in

Address

Status

Serial

Time

dns1.p01.nsone.net

parent + zone

198.51.44.1 glue

authoritative

1624991843

14 ms

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

authoritative

1624991843

14 ms

dns2.p01.nsone.net

parent + zone

198.51.45.1 glue

authoritative

1624991843

6.1 ms

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

authoritative

1624991843

14 ms

dns3.p01.nsone.net

parent + zone

198.51.44.65 glue

authoritative

1624991843

14 ms

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

authoritative

1624991843

14 ms

dns4.p01.nsone.net

parent + zone

198.51.45.65 glue

authoritative

1624991843

6.1 ms

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

authoritative

1624991843

13 ms

DNSSEC

44.51.198.in-addr.arpa is signed, and the 198.in-addr.arpa. zone vouches for it with 1 DS record.

Validating resolvers: Cloudflare secure Google secure

DS at the parent

Key tag

Algorithm

Digest

Matches a DNSKEY

48553

13 ECDSAP256SHA256

SHA-256

yes, digest verified

DNSKEYs in the zone

Key tag

Role

Algorithm

Size

48553

KSK (signs keys)

13 ECDSAP256SHA256

256 bits

12196

ZSK (signs records)

13 ECDSAP256SHA256

256 bits

Signatures

Over

Valid from

Expires

Left

PTR

2026-11-09 05:11

2026-11-10 07:11 UTC

1 d

NSEC

2026-11-09 05:11

2026-11-10 07:11 UTC

1 d

DNSKEY

2026-11-08 16:14

2026-11-15 17:14 UTC

6.5 d

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 ✓

dns2.p01.nsone.net

nameserver

198.51.45.1

dns2.p01.nsone.net ✓

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

dns2.p01.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 ✓

dns4.p01.nsone.net

nameserver

198.51.45.65

dns4.p01.nsone.net ✓

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

dns4.p01.nsone.net ✓

dns3.p02.nsone.net

PTR target

198.51.44.66

dns3.p02.nsone.net ✓

2620:4d:4000:6259:7:2:0:3

dns3.p02.nsone.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.

Resolver

PTR

Cloudflare 1.1.1.1

dns3.p02.nsone.net.

TTL 3600 · validated

Google 8.8.8.8

dns3.p02.nsone.net.

TTL 2017 · validated

Quad9 9.9.9.9

dns3.p02.nsone.net.

TTL 3600 · validated

OpenDNS 208.67.222.222

dns3.p02.nsone.net.

TTL 11 · validated

Text dump

; DNS report for 66.44.51.198.in-addr.arpa (198.51.44.66)
; 2026-11-09 06:11:27 UTC, 94 queries in 0.49 s, zone 44.51.198.in-addr.arpa

;; FINDINGS
;  [OK] No problems found.

;; RECORDS (authoritative, from dns2.p01.nsone.net (198.51.45.1))
66.44.51.198.in-addr.arpa.	3600	IN	PTR	dns3.p02.nsone.net.
66.44.51.198.in-addr.arpa.	3600	IN	RRSIG	PTR 13 6 3600 20261110071127 20261109051127 12196 44.51.198.in-addr.arpa. gsMeNbJAHKCPRX9ZwuEUIxkeQXMQWc9BpAjTgdu9a+PbCBwcl/m6mu4U/fjluN2WbGqqPK84kpfwKtM1EQsbDg==

;; TRACE
;  66.44.51.198.in-addr.arpa PTR
;  . @l.root-servers.net (199.7.83.42) 6.0 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. @a.in-addr-servers.arpa (199.180.182.53) 92 ms [NOERROR qr]: referral to 198.in-addr.arpa.
198.in-addr.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
198.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
198.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
198.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
198.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
198.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
198.in-addr.arpa.	86400	IN	DS	38425 8 2 5D11A7E945A7A04DBC9C5E6FB02A87319AABB8A4C44F336F2640BE95A322EC84
;  198.in-addr.arpa. @arin.authdns.ripe.net (193.0.9.10) 11 ms [NOERROR qr]: referral to 44.51.198.in-addr.arpa.
44.51.198.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
44.51.198.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
44.51.198.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
44.51.198.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
44.51.198.in-addr.arpa.	86400	IN	DS	48553 13 2 7F391737DC99F1208362D84B49B70EE7DE0D88532EFBE5E355F008B92A24D44A
;  44.51.198.in-addr.arpa. @dns2.p01.nsone.net (198.51.45.1) 6.0 ms [NOERROR qr aa]: answer
66.44.51.198.in-addr.arpa.	3600	IN	PTR	dns3.p02.nsone.net.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent+zone]
;    198.51.44.1                             ok                        1624991843  14 ms
;    2620:4d:4000:6259:7:1:0:1               ok                        1624991843  14 ms
;  dns2.p01.nsone.net [parent+zone]
;    198.51.45.1                             ok                        1624991843  6.1 ms
;    2a00:edc0:6259:7:1::2                   ok                        1624991843  14 ms
;  dns3.p01.nsone.net [parent+zone]
;    198.51.44.65                            ok                        1624991843  14 ms
;    2620:4d:4000:6259:7:1:0:3               ok                        1624991843  14 ms
;  dns4.p01.nsone.net [parent+zone]
;    198.51.45.65                            ok                        1624991843  6.1 ms
;    2a00:edc0:6259:7:1::4                   ok                        1624991843  13 ms

;; DNSSEC: signed (Cloudflare: secure, Google: secure)
44.51.198.in-addr.arpa.	86400	IN	DS	48553 13 2 7F391737DC99F1208362D84B49B70EE7DE0D88532EFBE5E355F008B92A24D44A	; matches DNSKEY
44.51.198.in-addr.arpa.	60	IN	DNSKEY	257 3 13 t+4DPP+MFZ0Cr7gAXiDYv6HTyXzq/O2ESVRLc/ysuh5xBXKIsjsj5baV1HzhBNo2F7mbsevsEo0/6UEL8+JBmA==	; tag 48553
44.51.198.in-addr.arpa.	60	IN	DNSKEY	256 3 13 3u9onSaqbxIlglXMHjh5Plcah8n2pXj0QuBVY/6YTdC6L/eUEYPDh57nOVJ8dd3fkPMrjt2Oij6J9EeLqyeuBw==	; tag 12196

;; 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)
;  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)
;  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)
;  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)
;  dns3.p02.nsone.net (PTR target)
;    198.51.44.66                            PTR dns3.p02.nsone.net (confirmed)
;    2620:4d:4000:6259:7:2:0:3               PTR dns3.p02.nsone.net (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   dns3.p02.nsone.net.  ttl 3600  ad
;  Google     PTR   dns3.p02.nsone.net.  ttl 2017  ad
;  Quad9      PTR   dns3.p02.nsone.net.  ttl 3600  ad
;  OpenDNS    PTR   dns3.p02.nsone.net.  ttl 11  ad