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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.

119.23.111.170

170.111.23.119.in-addr.arpa

Zone 23.119.in-addr.arpa73 queries in 1.7 s2026-11-09 05:55:02 UTCNot DNSSEC-signed

WHOIS for 119.23.111.170 →TextJSON
  • Note All of 23.119.in-addr.arpa's nameservers are in one /24 network (140.205.122.0/24): one outage takes them all down.
  • Note 23.119.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of rdns2.alidns.com (140.205.122.243), an authoritative server: no cache in between, so these are the live values.

PTR Reverse pointer

3600PTRdns3.c01.nsone.net.cn.
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 g.root-servers.net 192.112.36.425 ms

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

    • e.in-addr-servers.arpa 203.119.86.101 2001:dd8:6::101
    • 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
    • a.in-addr-servers.arpa 199.180.182.53 2620:37:e000::53
    • 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 b.in-addr-servers.arpa 199.253.183.1836.1 ms

    Referral to 119.in-addr.arpa. signed (1 DS)

    • ns1.apnic.net 203.119.42.53 2001:dd8:e::53
    • ns2.apnic.net 203.119.95.53 2001:ddd::53
    • ns3.lacnic.net 200.3.13.14 2001:13c7:7002:3000::14
    • apnic.authdns.ripe.net 193.0.9.9 2a13:27c0:30::9
    • rirns.arin.net 199.253.249.53 2620:38:2000::53

    No glue for ns1.apnic.net, ns2.apnic.net, ns3.lacnic.net, apnic.authdns.ripe.net, rirns.arin.net: addresses looked up via a resolver.

  3. 119.in-addr.arpa.asked rirns.arin.net 199.253.249.5390 ms

    Referral to 23.119.in-addr.arpa. unsigned delegation

    • rdns2.alidns.com 140.205.122.243 2401:b180:4100::15
    • rdns1.alidns.com 140.205.122.253 2401:b180:4100::14

    No glue for rdns2.alidns.com, rdns1.alidns.com: addresses looked up via a resolver.

  4. 23.119.in-addr.arpa.asked rdns1.alidns.com 140.205.122.253195 ms

    Answer (authoritative):

    170.111.23.119.in-addr.arpa.3600PTRdns3.c01.nsone.net.cn.

    140.205.122.243 failed: NOERROR

Nameservers

Every address of every nameserver, asked for 23.119.in-addr.arpa's SOA. "Parent" means the 119.in-addr.arpa zone delegates to it; "zone" means 23.119.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
rdns1.alidns.comparent + zone140.205.122.253 glueauthoritative2015011364195 ms
2401:b180:4100::14 glueauthoritative2015011364223 ms
rdns2.alidns.comparent + zone140.205.122.243 glueauthoritative20150113646.6 ms
2401:b180:4100::15 glueauthoritative2015011364189 ms

DNSSEC

23.119.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)
rdns1.alidns.com
nameserver
140.205.122.253none
2401:b180:4100::14none
rdns2.alidns.com
nameserver
140.205.122.243none
2401:b180:4100::15none
dns3.c01.nsone.net.cn
PTR target
119.23.111.170dns3.c01.nsone.net.cn ✓

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 1.1.1.1dns3.c01.nsone.net.cn.
TTL 3600
Google 8.8.8.8dns3.c01.nsone.net.cn.
TTL 3600
Quad9 9.9.9.9dns3.c01.nsone.net.cn.
TTL 3600
OpenDNS 208.67.222.222dns3.c01.nsone.net.cn.
TTL 3600

Text dump

; DNS report for 170.111.23.119.in-addr.arpa (119.23.111.170)
; 2026-11-09 05:55:02 UTC, 73 queries in 1.75 s, zone 23.119.in-addr.arpa

;; FINDINGS
;  [INFO] All of 23.119.in-addr.arpa's nameservers are in one /24 network (140.205.122.0/24): one outage takes them all down.
;  [INFO] 23.119.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from rdns2.alidns.com (140.205.122.243))
170.111.23.119.in-addr.arpa.	3600	IN	PTR	dns3.c01.nsone.net.cn.

;; TRACE
;  170.111.23.119.in-addr.arpa PTR
;  . @g.root-servers.net (192.112.36.4) 25 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	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	a.in-addr-servers.arpa.	; 199.180.182.53 2620:37:e000::53
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	54956 8 2 E0E2BF5CFBD66572CA05EC18267D91509BA6A9405AF05C3FD4141DFA45200C08
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. @b.in-addr-servers.arpa (199.253.183.183) 6.1 ms [NOERROR qr]: referral to 119.in-addr.arpa.
119.in-addr.arpa.		NS	ns1.apnic.net.	; 203.119.42.53 2001:dd8:e::53
119.in-addr.arpa.		NS	ns2.apnic.net.	; 203.119.95.53 2001:ddd::53
119.in-addr.arpa.		NS	ns3.lacnic.net.	; 200.3.13.14 2001:13c7:7002:3000::14
119.in-addr.arpa.		NS	apnic.authdns.ripe.net.	; 193.0.9.9 2a13:27c0:30::9
119.in-addr.arpa.		NS	rirns.arin.net.	; 199.253.249.53 2620:38:2000::53
119.in-addr.arpa.	86400	IN	DS	64403 13 2 33630725771AB6D5C902604FF31648CA723D0E962BFDE7411CF8854653F300AA
;  119.in-addr.arpa. @rirns.arin.net (199.253.249.53) 90 ms [NOERROR qr]: referral to 23.119.in-addr.arpa.
23.119.in-addr.arpa.		NS	rdns2.alidns.com.	; 140.205.122.243 2401:b180:4100::15
23.119.in-addr.arpa.		NS	rdns1.alidns.com.	; 140.205.122.253 2401:b180:4100::14
;  23.119.in-addr.arpa. @rdns1.alidns.com (140.205.122.253) 195 ms [NOERROR qr aa]: answer
170.111.23.119.in-addr.arpa.	3600	IN	PTR	dns3.c01.nsone.net.cn.

;; NAMESERVERS (SOA asked of each address)
;  rdns1.alidns.com [parent+zone]
;    140.205.122.253                         ok                        2015011364  195 ms
;    2401:b180:4100::14                      ok                        2015011364  223 ms
;  rdns2.alidns.com [parent+zone]
;    140.205.122.243                         ok                        2015011364  6.6 ms
;    2401:b180:4100::15                      ok                        2015011364  189 ms

;; DNSSEC: unsigned

;; HOSTS
;  rdns1.alidns.com (nameserver)
;    140.205.122.253                         PTR none
;    2401:b180:4100::14                      PTR none
;  rdns2.alidns.com (nameserver)
;    140.205.122.243                         PTR none
;    2401:b180:4100::15                      PTR none
;  dns3.c01.nsone.net.cn (PTR target)
;    119.23.111.170                          PTR dns3.c01.nsone.net.cn (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   dns3.c01.nsone.net.cn.  ttl 3600
;  Google     PTR   dns3.c01.nsone.net.cn.  ttl 3600
;  Quad9      PTR   dns3.c01.nsone.net.cn.  ttl 3600
;  OpenDNS    PTR   dns3.c01.nsone.net.cn.  ttl 3600