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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.

45.54.68.193

193.68.54.45.in-addr.arpa

Zone 68.54.45.in-addr.arpa142 queries in 1.4 s2026-11-09 06:11:21 UTCNot DNSSEC-signed

WHOIS for 45.54.68.193 →TextJSON
  • Warning The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.athenahealth-dns.com, ns02.athenahealth-dns.com, ns03.athenahealth-dns.com, ns04.athenahealth-dns.com but 68.54.45.in-addr.arpa itself lists dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net, ns01.athenahealth-dns.com, ns02.athenahealth-dns.com, ns03.athenahealth-dns.com, ns04.athenahealth-dns.com. Make the two lists match.
  • Note 68.54.45.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

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.

PTR Reverse pointer

3600PTRns04.athenahealth-dns.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 i.root-servers.net 192.36.148.175.9 ms

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

    • 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
    • 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
    • f.in-addr-servers.arpa 193.0.9.1 2a13:27c0:30::1

    170.247.170.2 failed: NOERROR

  2. in-addr.arpa.asked f.in-addr-servers.arpa 193.0.9.112 ms

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

    • y.arin.net 192.82.134.30 2001:500:127::30
    • 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
    • arin.authdns.ripe.net 193.0.9.10 2a13:27c0:30::10
    • z.arin.net 199.180.180.63 2001:500:f0::63

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

    200.10.60.53 failed: NOERROR

  3. 45.in-addr.arpa.asked arin.authdns.ripe.net 193.0.9.1012 ms

    Referral to 68.54.45.in-addr.arpa. unsigned delegation

    • dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2
    • ns04.athenahealth-dns.com 45.54.68.193
    • dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
    • ns01.athenahealth-dns.com 45.54.68.1
    • ns02.athenahealth-dns.com 45.54.68.65
    • ns03.athenahealth-dns.com 45.54.68.129
    • 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

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

  4. 68.54.45.in-addr.arpa.asked ns04.athenahealth-dns.com 45.54.68.19391 ms

    Answer (authoritative):

    193.68.54.45.in-addr.arpa.3600PTRns04.athenahealth-dns.com.

Nameservers

Every address of every nameserver, asked for 68.54.45.in-addr.arpa's SOA. "Parent" means the 45.in-addr.arpa zone delegates to it; "zone" means 68.54.45.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p01.nsone.netparent198.51.44.1 glueauthoritative154106422217 ms
2620:4d:4000:6259:7:1:0:1 glueauthoritative154106422214 ms
dns1.p08.nsone.netzone198.51.44.8authoritative154106422214 ms
2620:4d:4000:6259:7:8:0:1authoritative154106422213 ms
dns2.p01.nsone.netparent198.51.45.1 glueauthoritative15410642226.0 ms
2a00:edc0:6259:7:1::2 glueauthoritative154106422214 ms
dns2.p08.nsone.netzone198.51.45.8authoritative15410642226.6 ms
2a00:edc0:6259:7:8::2authoritative154106422213 ms
dns3.p01.nsone.netparent198.51.44.65 glueauthoritative154106422214 ms
2620:4d:4000:6259:7:1:0:3 glueauthoritative154106422214 ms
dns3.p08.nsone.netzone198.51.44.72authoritative154106422214 ms
2620:4d:4000:6259:7:8:0:3authoritative154106422215 ms
dns4.p01.nsone.netparent198.51.45.65 glueauthoritative15410642226.4 ms
2a00:edc0:6259:7:1::4 glueauthoritative154106422214 ms
dns4.p08.nsone.netzone198.51.45.72authoritative15410642226.5 ms
2a00:edc0:6259:7:8::4authoritative154106422213 ms
ns01.athenahealth-dns.comparent + zone45.54.68.1 glueauthoritative154106422290 ms
ns02.athenahealth-dns.comparent + zone45.54.68.65 glueauthoritative154106422290 ms
ns03.athenahealth-dns.comparent + zone45.54.68.129 glueauthoritative154106422290 ms
ns04.athenahealth-dns.comparent + zone45.54.68.193 glueauthoritative154106422291 ms

DNSSEC

68.54.45.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.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.p01.nsone.net
nameserver
198.51.45.1dns2.p01.nsone.net ✓
2a00:edc0:6259:7:1::2dns2.p01.nsone.net ✓
dns2.p08.nsone.net
nameserver
198.51.45.8dns2.p08.nsone.net ✓
2a00:edc0:6259:7:8::2dns2.p08.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.p08.nsone.net
nameserver
198.51.44.72dns3.p08.nsone.net ✓
2620:4d:4000:6259:7:8:0:3dns3.p08.nsone.net ✓
dns4.p01.nsone.net
nameserver
198.51.45.65dns4.p01.nsone.net ✓
2a00:edc0:6259:7:1::4dns4.p01.nsone.net ✓
dns4.p08.nsone.net
nameserver
198.51.45.72dns4.p08.nsone.net ✓
2a00:edc0:6259:7:8::4dns4.p08.nsone.net ✓
ns01.athenahealth-dns.com
nameserver
45.54.68.1ns01.athenahealth-dns.com ✓
ns02.athenahealth-dns.com
nameserver
45.54.68.65ns02.athenahealth-dns.com ✓
ns03.athenahealth-dns.com
nameserver
45.54.68.129ns03.athenahealth-dns.com ✓
ns04.athenahealth-dns.com
nameserver · PTR target
45.54.68.193ns04.athenahealth-dns.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 1.1.1.1ns04.athenahealth-dns.com.
TTL 3600
Google 8.8.8.8ns04.athenahealth-dns.com.
TTL 3600
Quad9 9.9.9.9ns04.athenahealth-dns.com.
TTL 3600
OpenDNS 208.67.222.222ns04.athenahealth-dns.com.
TTL 3600

Text dump

; DNS report for 193.68.54.45.in-addr.arpa (45.54.68.193)
; 2026-11-09 06:11:21 UTC, 142 queries in 1.41 s, zone 68.54.45.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.athenahealth-dns.com, ns02.athenahealth-dns.com, ns03.athenahealth-dns.com, ns04.athenahealth-dns.com but 68.54.45.in-addr.arpa itself lists dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net, ns01.athenahealth-dns.com, ns02.athenahealth-dns.com, ns03.athenahealth-dns.com, ns04.athenahealth-dns.com. Make the two lists match.
;  [INFO] 68.54.45.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from dns2.p01.nsone.net (198.51.45.1))
193.68.54.45.in-addr.arpa.	3600	IN	PTR	ns04.athenahealth-dns.com.

;; TRACE
;  193.68.54.45.in-addr.arpa PTR
;  . @i.root-servers.net (192.36.148.17) 5.9 ms [NOERROR qr]: referral to in-addr.arpa.
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	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	f.in-addr-servers.arpa.	; 193.0.9.1 2a13:27c0:30::1
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.	86400	IN	DS	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
;  in-addr.arpa. @f.in-addr-servers.arpa (193.0.9.1) 12 ms [NOERROR qr]: referral to 45.in-addr.arpa.
45.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
45.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
45.in-addr.arpa.		NS	r.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	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
45.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
45.in-addr.arpa.	86400	IN	DS	9136 8 2 97414863B7A0FDE713FB174990E9B43DE47467707010C01380743425EE6D146B
;  45.in-addr.arpa. @arin.authdns.ripe.net (193.0.9.10) 12 ms [NOERROR qr]: referral to 68.54.45.in-addr.arpa.
68.54.45.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
68.54.45.in-addr.arpa.		NS	ns04.athenahealth-dns.com.	; 45.54.68.193
68.54.45.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
68.54.45.in-addr.arpa.		NS	ns01.athenahealth-dns.com.	; 45.54.68.1
68.54.45.in-addr.arpa.		NS	ns02.athenahealth-dns.com.	; 45.54.68.65
68.54.45.in-addr.arpa.		NS	ns03.athenahealth-dns.com.	; 45.54.68.129
68.54.45.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
68.54.45.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
;  68.54.45.in-addr.arpa. @ns04.athenahealth-dns.com (45.54.68.193) 91 ms [NOERROR qr aa]: answer
193.68.54.45.in-addr.arpa.	3600	IN	PTR	ns04.athenahealth-dns.com.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             ok                        1541064222  17 ms
;    2620:4d:4000:6259:7:1:0:1               ok                        1541064222  14 ms
;  dns1.p08.nsone.net [zone]
;    198.51.44.8                             ok                        1541064222  14 ms
;    2620:4d:4000:6259:7:8:0:1               ok                        1541064222  13 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             ok                        1541064222  6.0 ms
;    2a00:edc0:6259:7:1::2                   ok                        1541064222  14 ms
;  dns2.p08.nsone.net [zone]
;    198.51.45.8                             ok                        1541064222  6.6 ms
;    2a00:edc0:6259:7:8::2                   ok                        1541064222  13 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            ok                        1541064222  14 ms
;    2620:4d:4000:6259:7:1:0:3               ok                        1541064222  14 ms
;  dns3.p08.nsone.net [zone]
;    198.51.44.72                            ok                        1541064222  14 ms
;    2620:4d:4000:6259:7:8:0:3               ok                        1541064222  15 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            ok                        1541064222  6.4 ms
;    2a00:edc0:6259:7:1::4                   ok                        1541064222  14 ms
;  dns4.p08.nsone.net [zone]
;    198.51.45.72                            ok                        1541064222  6.5 ms
;    2a00:edc0:6259:7:8::4                   ok                        1541064222  13 ms
;  ns01.athenahealth-dns.com [parent+zone]
;    45.54.68.1                              ok                        1541064222  90 ms
;  ns02.athenahealth-dns.com [parent+zone]
;    45.54.68.65                             ok                        1541064222  90 ms
;  ns03.athenahealth-dns.com [parent+zone]
;    45.54.68.129                            ok                        1541064222  90 ms
;  ns04.athenahealth-dns.com [parent+zone]
;    45.54.68.193                            ok                        1541064222  91 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.athenahealth-dns.com (nameserver)
;    45.54.68.1                              PTR ns01.athenahealth-dns.com (confirmed)
;  ns02.athenahealth-dns.com (nameserver)
;    45.54.68.65                             PTR ns02.athenahealth-dns.com (confirmed)
;  ns03.athenahealth-dns.com (nameserver)
;    45.54.68.129                            PTR ns03.athenahealth-dns.com (confirmed)
;  ns04.athenahealth-dns.com (nameserver; PTR target)
;    45.54.68.193                            PTR ns04.athenahealth-dns.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   ns04.athenahealth-dns.com.  ttl 3600
;  Google     PTR   ns04.athenahealth-dns.com.  ttl 3600
;  Quad9      PTR   ns04.athenahealth-dns.com.  ttl 3600
;  OpenDNS    PTR   ns04.athenahealth-dns.com.  ttl 3600