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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.

198.51.45.73

73.45.51.198.in-addr.arpa

Zone 45.51.198.in-addr.arpa98 queries in 1.0 s2026-11-09 05:34:56 UTCDNSSEC signed

WHOIS for 198.51.45.73 →TextJSON

No problems found.

Records

Asked directly of dns2.p08.nsone.net (198.51.45.8), an authoritative server: no cache in between, so these are the live values. Each set is DNSSEC-signed.

PTR Reverse pointer

3600PTRdns4.p09.nsone.net.
3600PTRns7.demysdns.com.
ANY query: 1 records
60NSEC\000.73.45.51.198.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

  1. .asked a.root-servers.net 198.41.0.412 ms

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

    • 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
    • a.in-addr-servers.arpa 199.180.182.53 2620:37:e000::53
    • 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

    193.0.14.129 failed: NOERROR

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

    Referral to 198.in-addr.arpa. signed (1 DS)

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

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

    196.216.169.10 failed: NOERROR

  3. 198.in-addr.arpa.asked x.arin.net 199.180.180.6391 ms

    Referral to 45.51.198.in-addr.arpa. signed (1 DS)

    • dns1.p08.nsone.net 198.51.44.8 2620:4d:4000:6259:7:8:0:1
    • dns4.p08.nsone.net 198.51.45.72 2a00:edc0:6259:7:8::4
    • dns3.p08.nsone.net 198.51.44.72 2620:4d:4000:6259:7:8:0:3
    • dns2.p08.nsone.net 198.51.45.8 2a00:edc0:6259:7:8::2

    No glue for dns1.p08.nsone.net, dns4.p08.nsone.net, dns3.p08.nsone.net, dns2.p08.nsone.net: addresses looked up via a resolver.

  4. 45.51.198.in-addr.arpa.asked dns4.p08.nsone.net 198.51.45.726.5 ms

    Answer (authoritative):

    73.45.51.198.in-addr.arpa.3600PTRdns4.p09.nsone.net.
    73.45.51.198.in-addr.arpa.3600PTRns7.demysdns.com.

    198.51.44.72 failed: NOERROR

Nameservers

Every address of every nameserver, asked for 45.51.198.in-addr.arpa's SOA. "Parent" means the 198.in-addr.arpa zone delegates to it; "zone" means 45.51.198.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p08.nsone.netparent + zone198.51.44.8 glueauthoritative162499198213 ms
2620:4d:4000:6259:7:8:0:1 glueauthoritative162499198213 ms
dns2.p08.nsone.netparent + zone198.51.45.8 glueauthoritative16249919826.3 ms
2a00:edc0:6259:7:8::2 glueauthoritative162499198214 ms
dns3.p08.nsone.netparent + zone198.51.44.72 glueauthoritative162499198214 ms
2620:4d:4000:6259:7:8:0:3 glueauthoritative162499198214 ms
dns4.p08.nsone.netparent + zone198.51.45.72 glueauthoritative16249919827.0 ms
2a00:edc0:6259:7:8::4 glueauthoritative162499198214 ms

DNSSEC

45.51.198.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 tagAlgorithmDigestMatches a DNSKEY
4855313 ECDSAP256SHA256SHA-256yes, digest verified

DNSKEYs in the zone

Key tagRoleAlgorithmSize
48553KSK (signs keys)13 ECDSAP256SHA256256 bits
12196ZSK (signs records)13 ECDSAP256SHA256256 bits

Signatures

OverValid fromExpiresLeft
PTR2026-11-09 04:342026-11-10 06:34 UTC1 d
NSEC2026-11-09 04:342026-11-10 06:34 UTC1 d
DNSKEY2026-11-08 16:142026-11-15 17:14 UTC6.5 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.

HostAddressReverse DNS (PTR)
dns1.p08.nsone.net
nameserver
198.51.44.8ns8.demysdns.com, dns1.p08.nsone.net ✓
2620:4d:4000:6259:7:8:0:1dns1.p08.nsone.net, ns8.demysdns.com ✓
dns2.p08.nsone.net
nameserver
198.51.45.8dns2.p08.nsone.net ✓
2a00:edc0:6259:7:8::2dns2.p08.nsone.net ✓
dns3.p08.nsone.net
nameserver
198.51.44.72dns3.p08.nsone.net ✓
2620:4d:4000:6259:7:8:0:3dns3.p08.nsone.net ✓
dns4.p08.nsone.net
nameserver
198.51.45.72dns4.p08.nsone.net ✓
2a00:edc0:6259:7:8::4dns4.p08.nsone.net ✓
dns4.p09.nsone.net
PTR target
198.51.45.73ns7.demysdns.com, dns4.p09.nsone.net ✓
2a00:edc0:6259:7:9::4dns4.p09.nsone.net, ns7.demysdns.com ✓
ns7.demysdns.com
PTR target
198.51.45.73ns7.demysdns.com, dns4.p09.nsone.net ✓
2a00:edc0:6259:7:9::4dns4.p09.nsone.net, ns7.demysdns.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 1.1.1.1dns4.p09.nsone.net.
ns7.demysdns.com.
TTL 3600 · validated
Google 8.8.8.8dns4.p09.nsone.net.
ns7.demysdns.com.
TTL 1470 · validated
Quad9 9.9.9.9dns4.p09.nsone.net.
ns7.demysdns.com.
TTL 3600 · validated
OpenDNS 208.67.222.222dns4.p09.nsone.net.
ns7.demysdns.com.
TTL 60 · validated

Text dump

; DNS report for 73.45.51.198.in-addr.arpa (198.51.45.73)
; 2026-11-09 05:34:56 UTC, 98 queries in 1.02 s, zone 45.51.198.in-addr.arpa

;; FINDINGS
;  [OK] No problems found.

;; RECORDS (authoritative, from dns2.p08.nsone.net (198.51.45.8))
73.45.51.198.in-addr.arpa.	3600	IN	PTR	dns4.p09.nsone.net.
73.45.51.198.in-addr.arpa.	3600	IN	PTR	ns7.demysdns.com.
73.45.51.198.in-addr.arpa.	3600	IN	RRSIG	PTR 13 6 3600 20261110063455 20261109043455 12196 45.51.198.in-addr.arpa. DkmpVlkuM5DBvytI9BApxHh5S4LUv5veJcw7O3aVltORcnj+mJnYmuzRDYeG4bpcBdeWb2UD57bQwLeZ8l0c4g==

;; TRACE
;  73.45.51.198.in-addr.arpa PTR
;  . @a.root-servers.net (198.41.0.4) 12 ms [NOERROR qr]: referral to in-addr.arpa.
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.		NS	a.in-addr-servers.arpa.	; 199.180.182.53 2620:37:e000::53
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.	86400	IN	DS	63982 8 2 AAF4FB5D213EF25AE44679032EBE3514C487D7ABD99D7F5FEC3383D030733C73
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	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
;  in-addr.arpa. @a.in-addr-servers.arpa (199.180.182.53) 90 ms [NOERROR qr]: referral to 198.in-addr.arpa.
198.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
198.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
198.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
198.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
198.in-addr.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
198.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
198.in-addr.arpa.	86400	IN	DS	38425 8 2 5D11A7E945A7A04DBC9C5E6FB02A87319AABB8A4C44F336F2640BE95A322EC84
;  198.in-addr.arpa. @x.arin.net (199.180.180.63) 91 ms [NOERROR qr]: referral to 45.51.198.in-addr.arpa.
45.51.198.in-addr.arpa.		NS	dns1.p08.nsone.net.	; 198.51.44.8 2620:4d:4000:6259:7:8:0:1
45.51.198.in-addr.arpa.		NS	dns4.p08.nsone.net.	; 198.51.45.72 2a00:edc0:6259:7:8::4
45.51.198.in-addr.arpa.		NS	dns3.p08.nsone.net.	; 198.51.44.72 2620:4d:4000:6259:7:8:0:3
45.51.198.in-addr.arpa.		NS	dns2.p08.nsone.net.	; 198.51.45.8 2a00:edc0:6259:7:8::2
45.51.198.in-addr.arpa.	86400	IN	DS	48553 13 2 FCDF757052D12A81A2FD16CB2F3CEC843187521E025402882CCD3D6425F83EAA
;  45.51.198.in-addr.arpa. @dns4.p08.nsone.net (198.51.45.72) 6.5 ms [NOERROR qr aa]: answer
73.45.51.198.in-addr.arpa.	3600	IN	PTR	dns4.p09.nsone.net.
73.45.51.198.in-addr.arpa.	3600	IN	PTR	ns7.demysdns.com.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p08.nsone.net [parent+zone]
;    198.51.44.8                             ok                        1624991982  13 ms
;    2620:4d:4000:6259:7:8:0:1               ok                        1624991982  13 ms
;  dns2.p08.nsone.net [parent+zone]
;    198.51.45.8                             ok                        1624991982  6.3 ms
;    2a00:edc0:6259:7:8::2                   ok                        1624991982  14 ms
;  dns3.p08.nsone.net [parent+zone]
;    198.51.44.72                            ok                        1624991982  14 ms
;    2620:4d:4000:6259:7:8:0:3               ok                        1624991982  14 ms
;  dns4.p08.nsone.net [parent+zone]
;    198.51.45.72                            ok                        1624991982  7.0 ms
;    2a00:edc0:6259:7:8::4                   ok                        1624991982  14 ms

;; DNSSEC: signed (Cloudflare: secure, Google: secure)
45.51.198.in-addr.arpa.	86400	IN	DS	48553 13 2 FCDF757052D12A81A2FD16CB2F3CEC843187521E025402882CCD3D6425F83EAA	; matches DNSKEY
45.51.198.in-addr.arpa.	60	IN	DNSKEY	257 3 13 t+4DPP+MFZ0Cr7gAXiDYv6HTyXzq/O2ESVRLc/ysuh5xBXKIsjsj5baV1HzhBNo2F7mbsevsEo0/6UEL8+JBmA==	; tag 48553
45.51.198.in-addr.arpa.	60	IN	DNSKEY	256 3 13 3u9onSaqbxIlglXMHjh5Plcah8n2pXj0QuBVY/6YTdC6L/eUEYPDh57nOVJ8dd3fkPMrjt2Oij6J9EeLqyeuBw==	; tag 12196

;; HOSTS
;  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.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.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.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)
;  dns4.p09.nsone.net (PTR target)
;    198.51.45.73                            PTR ns7.demysdns.com, dns4.p09.nsone.net (confirmed)
;    2a00:edc0:6259:7:9::4                   PTR dns4.p09.nsone.net, ns7.demysdns.com (confirmed)
;  ns7.demysdns.com (PTR target)
;    198.51.45.73                            PTR ns7.demysdns.com, dns4.p09.nsone.net (confirmed)
;    2a00:edc0:6259:7:9::4                   PTR dns4.p09.nsone.net, ns7.demysdns.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   dns4.p09.nsone.net., ns7.demysdns.com.  ttl 3600  ad
;  Google     PTR   dns4.p09.nsone.net., ns7.demysdns.com.  ttl 1470  ad
;  Quad9      PTR   dns4.p09.nsone.net., ns7.demysdns.com.  ttl 3600  ad
;  OpenDNS    PTR   dns4.p09.nsone.net., ns7.demysdns.com.  ttl 60  ad