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.

45.54.16.193

193.16.54.45.in-addr.arpa

Zone 16.54.45.in-addr.arpa140 queries in 1.1 s2026-11-09 06:11:23 UTCNot DNSSEC-signed

WHOIS for 45.54.16.193 →Text JSON

Warning The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net but 16.54.45.in-addr.arpa itself lists dns1.p06.nsone.net, dns2.p06.nsone.net, dns3.p06.nsone.net, dns4.p06.nsone.net, ns01.jetbluedns.com, ns02.jetbluedns.com, ns03.jetbluedns.com, ns04.jetbluedns.com. Make the two lists match.
Note 16.54.45.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

ns04.jetbluedns.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 i.root-servers.net 192.36.148.176.0 ms
Referral to in-addr.arpa. signed (4 DS)
- 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
- 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
- b.in-addr-servers.arpa 199.253.183.183 2001:500:87::87
- e.in-addr-servers.arpa 203.119.86.101 2001:dd8:6::101
in-addr.arpa.asked f.in-addr-servers.arpa 193.0.9.112 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.
203.119.86.101 failed: NOERROR
45.in-addr.arpa.asked u.arin.net 204.61.216.505.7 ms
Referral to 16.54.45.in-addr.arpa. unsigned delegation
- 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
- dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
No glue for dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, dns1.p01.nsone.net: addresses looked up via a resolver.
16.54.45.in-addr.arpa.asked dns3.p01.nsone.net 198.51.44.6513 ms
Answer (authoritative):
193.16.54.45.in-addr.arpa. 3600 PTR ns04.jetbluedns.com.
198.51.44.1 failed: NOERROR

Nameservers

Every address of every nameserver, asked for 16.54.45.in-addr.arpa's SOA. "Parent" means the 45.in-addr.arpa zone delegates to it; "zone" means 16.54.45.in-addr.arpa lists it itself.

Nameserver

Listed in

Address

Status

Serial

Time

dns1.p01.nsone.net

parent

198.51.44.1 glue

authoritative

1502190598

16 ms

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

authoritative

1502190598

14 ms

dns1.p06.nsone.net

zone

198.51.44.6

authoritative

1502190598

16 ms

2620:4d:4000:6259:7:6:0:1

authoritative

1502190598

16 ms

dns2.p01.nsone.net

parent

198.51.45.1 glue

authoritative

1502190598

7.0 ms

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

authoritative

1502190598

15 ms

dns2.p06.nsone.net

zone

198.51.45.6

authoritative

1502190598

6.9 ms

2a00:edc0:6259:7:6::2

authoritative

1502190598

14 ms

dns3.p01.nsone.net

parent

198.51.44.65 glue

authoritative

1502190598

15 ms

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

authoritative

1502190598

15 ms

dns3.p06.nsone.net

zone

198.51.44.70

authoritative

1502190598

15 ms

2620:4d:4000:6259:7:6:0:3

authoritative

1502190598

15 ms

dns4.p01.nsone.net

parent

198.51.45.65 glue

authoritative

1502190598

6.7 ms

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

authoritative

1502190598

14 ms

dns4.p06.nsone.net

zone

198.51.45.70

authoritative

1502190598

6.8 ms

2a00:edc0:6259:7:6::4

authoritative

1502190598

13 ms

ns01.jetbluedns.com

zone

45.54.16.1

authoritative

1502190598

102 ms

ns02.jetbluedns.com

zone

45.54.16.65

authoritative

1502190598

101 ms

ns03.jetbluedns.com

zone

45.54.16.129

authoritative

1502190598

93 ms

ns04.jetbluedns.com

zone

45.54.16.193

authoritative

1502190598

91 ms

DNSSEC

16.54.45.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.p06.nsone.net

nameserver

198.51.44.6

dns1.p06.nsone.net ✓

2620:4d:4000:6259:7:6:0:1

dns1.p06.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 ✓

dns2.p06.nsone.net

nameserver

198.51.45.6

dns2.p06.nsone.net ✓

2a00:edc0:6259:7:6::2

dns2.p06.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.p06.nsone.net

nameserver

198.51.44.70

dns3.p06.nsone.net ✓

2620:4d:4000:6259:7:6:0:3

dns3.p06.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.p06.nsone.net

nameserver

198.51.45.70

dns4.p06.nsone.net ✓

2a00:edc0:6259:7:6::4

dns4.p06.nsone.net ✓

ns01.jetbluedns.com

nameserver

45.54.16.1

ns01.jetbluedns.com ✓

ns02.jetbluedns.com

nameserver

45.54.16.65

ns02.jetbluedns.com ✓

ns03.jetbluedns.com

nameserver

45.54.16.129

ns03.jetbluedns.com ✓

ns04.jetbluedns.com

nameserver · PTR target

45.54.16.193

ns04.jetbluedns.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

ns04.jetbluedns.com.

TTL 3600

Google 8.8.8.8

ns04.jetbluedns.com.

TTL 3600

Quad9 9.9.9.9

ns04.jetbluedns.com.

TTL 3600

OpenDNS 208.67.222.222

ns04.jetbluedns.com.

TTL 3600

Text dump

; DNS report for 193.16.54.45.in-addr.arpa (45.54.16.193)
; 2026-11-09 06:11:23 UTC, 140 queries in 1.11 s, zone 16.54.45.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 but 16.54.45.in-addr.arpa itself lists dns1.p06.nsone.net, dns2.p06.nsone.net, dns3.p06.nsone.net, dns4.p06.nsone.net, ns01.jetbluedns.com, ns02.jetbluedns.com, ns03.jetbluedns.com, ns04.jetbluedns.com. Make the two lists match.
;  [INFO] 16.54.45.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))
193.16.54.45.in-addr.arpa.	3600	IN	PTR	ns04.jetbluedns.com.

;; TRACE
;  193.16.54.45.in-addr.arpa PTR
;  . @i.root-servers.net (192.36.148.17) 6.0 ms [NOERROR qr]: referral to in-addr.arpa.
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.		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	b.in-addr-servers.arpa.	; 199.253.183.183 2001:500:87::87
in-addr.arpa.		NS	e.in-addr-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
in-addr.arpa.	86400	IN	DS	53696 8 2 13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D424F04DF
in-addr.arpa.	86400	IN	DS	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
in-addr.arpa.	86400	IN	DS	63982 8 2 AAF4FB5D213EF25AE44679032EBE3514C487D7ABD99D7F5FEC3383D030733C73
in-addr.arpa.	86400	IN	DS	54956 8 2 E0E2BF5CFBD66572CA05EC18267D91509BA6A9405AF05C3FD4141DFA45200C08
;  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	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) 5.7 ms [NOERROR qr]: referral to 16.54.45.in-addr.arpa.
16.54.45.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
16.54.45.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
16.54.45.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
16.54.45.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
;  16.54.45.in-addr.arpa. @dns3.p01.nsone.net (198.51.44.65) 13 ms [NOERROR qr aa]: answer
193.16.54.45.in-addr.arpa.	3600	IN	PTR	ns04.jetbluedns.com.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             ok                        1502190598  16 ms
;    2620:4d:4000:6259:7:1:0:1               ok                        1502190598  14 ms
;  dns1.p06.nsone.net [zone]
;    198.51.44.6                             ok                        1502190598  16 ms
;    2620:4d:4000:6259:7:6:0:1               ok                        1502190598  16 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             ok                        1502190598  7.0 ms
;    2a00:edc0:6259:7:1::2                   ok                        1502190598  15 ms
;  dns2.p06.nsone.net [zone]
;    198.51.45.6                             ok                        1502190598  6.9 ms
;    2a00:edc0:6259:7:6::2                   ok                        1502190598  14 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            ok                        1502190598  15 ms
;    2620:4d:4000:6259:7:1:0:3               ok                        1502190598  15 ms
;  dns3.p06.nsone.net [zone]
;    198.51.44.70                            ok                        1502190598  15 ms
;    2620:4d:4000:6259:7:6:0:3               ok                        1502190598  15 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            ok                        1502190598  6.7 ms
;    2a00:edc0:6259:7:1::4                   ok                        1502190598  14 ms
;  dns4.p06.nsone.net [zone]
;    198.51.45.70                            ok                        1502190598  6.8 ms
;    2a00:edc0:6259:7:6::4                   ok                        1502190598  13 ms
;  ns01.jetbluedns.com [zone]
;    45.54.16.1                              ok                        1502190598  102 ms
;  ns02.jetbluedns.com [zone]
;    45.54.16.65                             ok                        1502190598  101 ms
;  ns03.jetbluedns.com [zone]
;    45.54.16.129                            ok                        1502190598  93 ms
;  ns04.jetbluedns.com [zone]
;    45.54.16.193                            ok                        1502190598  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.p06.nsone.net (nameserver)
;    198.51.44.6                             PTR dns1.p06.nsone.net (confirmed)
;    2620:4d:4000:6259:7:6:0:1               PTR dns1.p06.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.p06.nsone.net (nameserver)
;    198.51.45.6                             PTR dns2.p06.nsone.net (confirmed)
;    2a00:edc0:6259:7:6::2                   PTR dns2.p06.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.p06.nsone.net (nameserver)
;    198.51.44.70                            PTR dns3.p06.nsone.net (confirmed)
;    2620:4d:4000:6259:7:6:0:3               PTR dns3.p06.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.p06.nsone.net (nameserver)
;    198.51.45.70                            PTR dns4.p06.nsone.net (confirmed)
;    2a00:edc0:6259:7:6::4                   PTR dns4.p06.nsone.net (confirmed)
;  ns01.jetbluedns.com (nameserver)
;    45.54.16.1                              PTR ns01.jetbluedns.com (confirmed)
;  ns02.jetbluedns.com (nameserver)
;    45.54.16.65                             PTR ns02.jetbluedns.com (confirmed)
;  ns03.jetbluedns.com (nameserver)
;    45.54.16.129                            PTR ns03.jetbluedns.com (confirmed)
;  ns04.jetbluedns.com (nameserver; PTR target)
;    45.54.16.193                            PTR ns04.jetbluedns.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   ns04.jetbluedns.com.  ttl 3600
;  Google     PTR   ns04.jetbluedns.com.  ttl 3600
;  Quad9      PTR   ns04.jetbluedns.com.  ttl 3600
;  OpenDNS    PTR   ns04.jetbluedns.com.  ttl 3600