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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.

216.239.38.10

10.38.239.216.in-addr.arpa

Zone 38.239.216.in-addr.arpa88 queries in 0.7 s2026-11-09 05:24:55 UTCNot DNSSEC-signed

WHOIS for 216.239.38.10 →TextJSON
  • Warning Nameservers disagree on the SOA serial (1016230534 on ns1.google.com; 1016687210 on ns2.google.com, ns3.google.com, ns4.google.com). Normal when two DNS providers serve the zone, each numbering its own copy; otherwise some servers haven't picked up the latest change.
  • Note 38.239.216.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of ns4.google.com (216.239.38.10), an authoritative server: no cache in between, so these are the live values.

PTR Reverse pointer

86400PTRns4.google.com.
ANY query: 1 records
86400PTRns4.google.com.

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 192.112.36.426 ms

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

    • 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
    • b.in-addr-servers.arpa 199.253.183.183 2001:500:87::87
    • 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
    • d.in-addr-servers.arpa 200.10.60.53 2001:13c7:7010::53
  2. in-addr.arpa.asked b.in-addr-servers.arpa 199.253.183.1835.9 ms

    Referral to 216.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.

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

    Referral to 38.239.216.in-addr.arpa. unsigned delegation

    • ns3.google.com 216.239.36.10 2001:4860:4802:36::a
    • ns1.google.com 216.239.32.10 2001:4860:4802:32::a
    • ns2.google.com 216.239.34.10 2001:4860:4802:34::a
    • ns4.google.com 216.239.38.10 2001:4860:4802:38::a

    No glue for ns3.google.com, ns1.google.com, ns2.google.com, ns4.google.com: addresses looked up via a resolver.

  4. 38.239.216.in-addr.arpa.asked ns4.google.com 216.239.38.106.1 ms

    Answer (authoritative):

    10.38.239.216.in-addr.arpa.86400PTRns4.google.com.

    216.239.36.10 failed: NOERROR

Nameservers

Every address of every nameserver, asked for 38.239.216.in-addr.arpa's SOA. "Parent" means the 216.in-addr.arpa zone delegates to it; "zone" means 38.239.216.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
ns1.google.comparent + zone216.239.32.10 glueauthoritative101623053413 ms
2001:4860:4802:32::a glueauthoritative101623053419 ms
ns2.google.comparent + zone216.239.34.10 glueauthoritative101668721028 ms
2001:4860:4802:34::a glueauthoritative101668721027 ms
ns3.google.comparent + zone216.239.36.10 glueauthoritative101668721019 ms
2001:4860:4802:36::a glueauthoritative101668721019 ms
ns4.google.comparent + zone216.239.38.10 glueauthoritative10166872106.7 ms
2001:4860:4802:38::a glueauthoritative10166872107.1 ms

DNSSEC

38.239.216.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)
ns1.google.com
nameserver
216.239.32.10ns1.google.com ✓
2001:4860:4802:32::ans1.google.com ✓
ns2.google.com
nameserver
216.239.34.10ns2.google.com ✓
2001:4860:4802:34::ans2.google.com ✓
ns3.google.com
nameserver
216.239.36.10ns3.google.com ✓
2001:4860:4802:36::ans3.google.com ✓
ns4.google.com
nameserver · PTR target
216.239.38.10ns4.google.com ✓
2001:4860:4802:38::ans4.google.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 1.1.1.1ns4.google.com.
TTL 86400
Google 8.8.8.8ns4.google.com.
TTL 6604
Quad9 9.9.9.9ns4.google.com.
TTL 43200
OpenDNS 208.67.222.222ns4.google.com.
TTL 86400

Text dump

; DNS report for 10.38.239.216.in-addr.arpa (216.239.38.10)
; 2026-11-09 05:24:55 UTC, 88 queries in 0.73 s, zone 38.239.216.in-addr.arpa

;; FINDINGS
;  [WARN] Nameservers disagree on the SOA serial (1016230534 on ns1.google.com; 1016687210 on ns2.google.com, ns3.google.com, ns4.google.com). Normal when two DNS providers serve the zone, each numbering its own copy; otherwise some servers haven't picked up the latest change.
;  [INFO] 38.239.216.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from ns4.google.com (216.239.38.10))
10.38.239.216.in-addr.arpa.	86400	IN	PTR	ns4.google.com.

;; TRACE
;  10.38.239.216.in-addr.arpa PTR
;  . @g.root-servers.net (192.112.36.4) 26 ms [NOERROR qr]: referral to in-addr.arpa.
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.		NS	b.in-addr-servers.arpa.	; 199.253.183.183 2001:500:87::87
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	d.in-addr-servers.arpa.	; 200.10.60.53 2001:13c7:7010::53
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.	86400	IN	DS	53696 8 2 13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D424F04DF
;  in-addr.arpa. @b.in-addr-servers.arpa (199.253.183.183) 5.9 ms [NOERROR qr]: referral to 216.in-addr.arpa.
216.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
216.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
216.in-addr.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
216.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
216.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
216.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
216.in-addr.arpa.	86400	IN	DS	27937 8 2 ECD954713E1F0F2D3155BFAA5C8CD26F7CE854D768741A8F51406B0A8B3CC4B2
;  216.in-addr.arpa. @arin.authdns.ripe.net (193.0.9.10) 12 ms [NOERROR qr]: referral to 38.239.216.in-addr.arpa.
38.239.216.in-addr.arpa.		NS	ns3.google.com.	; 216.239.36.10 2001:4860:4802:36::a
38.239.216.in-addr.arpa.		NS	ns1.google.com.	; 216.239.32.10 2001:4860:4802:32::a
38.239.216.in-addr.arpa.		NS	ns2.google.com.	; 216.239.34.10 2001:4860:4802:34::a
38.239.216.in-addr.arpa.		NS	ns4.google.com.	; 216.239.38.10 2001:4860:4802:38::a
;  38.239.216.in-addr.arpa. @ns4.google.com (216.239.38.10) 6.1 ms [NOERROR qr aa]: answer
10.38.239.216.in-addr.arpa.	86400	IN	PTR	ns4.google.com.

;; NAMESERVERS (SOA asked of each address)
;  ns1.google.com [parent+zone]
;    216.239.32.10                           ok                        1016230534  13 ms
;    2001:4860:4802:32::a                    ok                        1016230534  19 ms
;  ns2.google.com [parent+zone]
;    216.239.34.10                           ok                        1016687210  28 ms
;    2001:4860:4802:34::a                    ok                        1016687210  27 ms
;  ns3.google.com [parent+zone]
;    216.239.36.10                           ok                        1016687210  19 ms
;    2001:4860:4802:36::a                    ok                        1016687210  19 ms
;  ns4.google.com [parent+zone]
;    216.239.38.10                           ok                        1016687210  6.7 ms
;    2001:4860:4802:38::a                    ok                        1016687210  7.1 ms

;; DNSSEC: unsigned

;; HOSTS
;  ns1.google.com (nameserver)
;    216.239.32.10                           PTR ns1.google.com (confirmed)
;    2001:4860:4802:32::a                    PTR ns1.google.com (confirmed)
;  ns2.google.com (nameserver)
;    216.239.34.10                           PTR ns2.google.com (confirmed)
;    2001:4860:4802:34::a                    PTR ns2.google.com (confirmed)
;  ns3.google.com (nameserver)
;    216.239.36.10                           PTR ns3.google.com (confirmed)
;    2001:4860:4802:36::a                    PTR ns3.google.com (confirmed)
;  ns4.google.com (nameserver; PTR target)
;    216.239.38.10                           PTR ns4.google.com (confirmed)
;    2001:4860:4802:38::a                    PTR ns4.google.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   ns4.google.com.  ttl 86400
;  Google     PTR   ns4.google.com.  ttl 6604
;  Quad9      PTR   ns4.google.com.  ttl 43200
;  OpenDNS    PTR   ns4.google.com.  ttl 86400