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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.

34.91.159.228

228.159.91.34.in-addr.arpa

Zone 91.34.in-addr.arpa57 queries in 1.1 s2026-11-09 05:34:56 UTCNot DNSSEC-signed

WHOIS for 34.91.159.228 →TextJSON
  • Problem None of 91.34.in-addr.arpa's nameservers gave an authoritative answer, so the zone is effectively offline.
  • Warning ns-gce-public1.googledomains.com (216.239.32.102) answers REFUSED for 91.34.in-addr.arpa.
  • Warning ns-gce-public1.googledomains.com (2001:4860:4802:32::66) answers REFUSED for 91.34.in-addr.arpa.
  • Warning ns-gce-public2.googledomains.com (216.239.34.102) answers REFUSED for 91.34.in-addr.arpa.
  • Warning ns-gce-public2.googledomains.com (2001:4860:4802:34::66) answers REFUSED for 91.34.in-addr.arpa.
  • Warning ns-gce-public3.googledomains.com (216.239.36.102) answers REFUSED for 91.34.in-addr.arpa.
  • Warning ns-gce-public3.googledomains.com (2001:4860:4802:36::66) answers REFUSED for 91.34.in-addr.arpa.
  • Warning ns-gce-public4.googledomains.com (216.239.38.102) answers REFUSED for 91.34.in-addr.arpa.
  • Warning ns-gce-public4.googledomains.com (2001:4860:4802:38::66) answers REFUSED for 91.34.in-addr.arpa.
  • Note 91.34.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Resolution trace

  1. .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
    • 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
    • f.in-addr-servers.arpa 193.0.9.1 2a13:27c0:30::1
    • e.in-addr-servers.arpa 203.119.86.101 2001:dd8:6::101

    192.5.5.241 failed: NOERROR

  2. in-addr.arpa.asked f.in-addr-servers.arpa 193.0.9.111 ms

    Referral to 34.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. 34.in-addr.arpa.asked u.arin.net 204.61.216.505.8 ms

    Referral to 91.34.in-addr.arpa. unsigned delegation

    • ns-gce-public1.googledomains.com 216.239.32.102 2001:4860:4802:32::66
    • ns-gce-public2.googledomains.com 216.239.34.102 2001:4860:4802:34::66
    • ns-gce-public3.googledomains.com 216.239.36.102 2001:4860:4802:36::66
    • ns-gce-public4.googledomains.com 216.239.38.102 2001:4860:4802:38::66

    No glue for ns-gce-public1.googledomains.com, ns-gce-public2.googledomains.com, ns-gce-public3.googledomains.com, ns-gce-public4.googledomains.com: addresses looked up via a resolver.

  4. 91.34.in-addr.arpa.asked ns-gce-public2.googledomains.com 216.239.34.10214 ms

    Answer (authoritative):

    228.159.91.34.in-addr.arpa.120PTR228.159.91.34.bc.googleusercontent.com.

Nameservers

Every address of every nameserver, asked for 91.34.in-addr.arpa's SOA. "Parent" means the 34.in-addr.arpa zone delegates to it; "zone" means 91.34.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
ns-gce-public1.googledomains.comparent216.239.32.102 glueREFUSED13 ms
2001:4860:4802:32::66 glueREFUSED14 ms
ns-gce-public2.googledomains.comparent216.239.34.102 glueREFUSED13 ms
2001:4860:4802:34::66 glueREFUSED13 ms
ns-gce-public3.googledomains.comparent216.239.36.102 glueREFUSED44 ms
2001:4860:4802:36::66 glueREFUSED44 ms
ns-gce-public4.googledomains.comparent216.239.38.102 glueREFUSED14 ms
2001:4860:4802:38::66 glueREFUSED14 ms

DNSSEC

91.34.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)
ns-gce-public1.googledomains.com
nameserver
216.239.32.102ns-gce-public1.googledomains.com ✓
2001:4860:4802:32::66ns-gce-public1.googledomains.com ✓
ns-gce-public2.googledomains.com
nameserver
216.239.34.102ns-gce-public2.googledomains.com ✓
2001:4860:4802:34::66ns-gce-public2.googledomains.com ✓
ns-gce-public3.googledomains.com
nameserver
216.239.36.102ns-gce-public3.googledomains.com ✓
2001:4860:4802:36::66ns-gce-public3.googledomains.com ✓
ns-gce-public4.googledomains.com
nameserver
216.239.38.102ns-gce-public4.googledomains.com ✓
2001:4860:4802:38::66ns-gce-public4.googledomains.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 1.1.1.1228.159.91.34.bc.googleusercontent.com.
TTL 120
Google 8.8.8.8228.159.91.34.bc.googleusercontent.com.
TTL 120
Quad9 9.9.9.9228.159.91.34.bc.googleusercontent.com.
TTL 120
OpenDNS 208.67.222.222228.159.91.34.bc.googleusercontent.com.
TTL 120

Text dump

; DNS report for 228.159.91.34.in-addr.arpa (34.91.159.228)
; 2026-11-09 05:34:56 UTC, 57 queries in 1.06 s, zone 91.34.in-addr.arpa

;; FINDINGS
;  [ERROR] None of 91.34.in-addr.arpa's nameservers gave an authoritative answer, so the zone is effectively offline.
;  [WARN] ns-gce-public1.googledomains.com (216.239.32.102) answers REFUSED for 91.34.in-addr.arpa.
;  [WARN] ns-gce-public1.googledomains.com (2001:4860:4802:32::66) answers REFUSED for 91.34.in-addr.arpa.
;  [WARN] ns-gce-public2.googledomains.com (216.239.34.102) answers REFUSED for 91.34.in-addr.arpa.
;  [WARN] ns-gce-public2.googledomains.com (2001:4860:4802:34::66) answers REFUSED for 91.34.in-addr.arpa.
;  [WARN] ns-gce-public3.googledomains.com (216.239.36.102) answers REFUSED for 91.34.in-addr.arpa.
;  [WARN] ns-gce-public3.googledomains.com (2001:4860:4802:36::66) answers REFUSED for 91.34.in-addr.arpa.
;  [WARN] ns-gce-public4.googledomains.com (216.239.38.102) answers REFUSED for 91.34.in-addr.arpa.
;  [WARN] ns-gce-public4.googledomains.com (2001:4860:4802:38::66) answers REFUSED for 91.34.in-addr.arpa.
;  [INFO] 91.34.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; TRACE
;  228.159.91.34.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	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	f.in-addr-servers.arpa.	; 193.0.9.1 2a13:27c0:30::1
in-addr.arpa.		NS	e.in-addr-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
in-addr.arpa.	86400	IN	DS	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
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	63982 8 2 AAF4FB5D213EF25AE44679032EBE3514C487D7ABD99D7F5FEC3383D030733C73
;  in-addr.arpa. @f.in-addr-servers.arpa (193.0.9.1) 11 ms [NOERROR qr]: referral to 34.in-addr.arpa.
34.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
34.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
34.in-addr.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
34.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
34.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
34.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
34.in-addr.arpa.	86400	IN	DS	30511 8 2 A593758EA306848F500689DF98E9FFF94021C25C8413C1633D122A9ED8397C64
;  34.in-addr.arpa. @u.arin.net (204.61.216.50) 5.8 ms [NOERROR qr]: referral to 91.34.in-addr.arpa.
91.34.in-addr.arpa.		NS	ns-gce-public1.googledomains.com.	; 216.239.32.102 2001:4860:4802:32::66
91.34.in-addr.arpa.		NS	ns-gce-public2.googledomains.com.	; 216.239.34.102 2001:4860:4802:34::66
91.34.in-addr.arpa.		NS	ns-gce-public3.googledomains.com.	; 216.239.36.102 2001:4860:4802:36::66
91.34.in-addr.arpa.		NS	ns-gce-public4.googledomains.com.	; 216.239.38.102 2001:4860:4802:38::66
;  91.34.in-addr.arpa. @ns-gce-public2.googledomains.com (216.239.34.102) 14 ms [NOERROR qr aa]: answer
228.159.91.34.in-addr.arpa.	120	IN	PTR	228.159.91.34.bc.googleusercontent.com.

;; NAMESERVERS (SOA asked of each address)
;  ns-gce-public1.googledomains.com [parent]
;    216.239.32.102                          REFUSED                               13 ms
;    2001:4860:4802:32::66                   REFUSED                               14 ms
;  ns-gce-public2.googledomains.com [parent]
;    216.239.34.102                          REFUSED                               13 ms
;    2001:4860:4802:34::66                   REFUSED                               13 ms
;  ns-gce-public3.googledomains.com [parent]
;    216.239.36.102                          REFUSED                               44 ms
;    2001:4860:4802:36::66                   REFUSED                               44 ms
;  ns-gce-public4.googledomains.com [parent]
;    216.239.38.102                          REFUSED                               14 ms
;    2001:4860:4802:38::66                   REFUSED                               14 ms

;; DNSSEC: unsigned

;; HOSTS
;  ns-gce-public1.googledomains.com (nameserver)
;    216.239.32.102                          PTR ns-gce-public1.googledomains.com (confirmed)
;    2001:4860:4802:32::66                   PTR ns-gce-public1.googledomains.com (confirmed)
;  ns-gce-public2.googledomains.com (nameserver)
;    216.239.34.102                          PTR ns-gce-public2.googledomains.com (confirmed)
;    2001:4860:4802:34::66                   PTR ns-gce-public2.googledomains.com (confirmed)
;  ns-gce-public3.googledomains.com (nameserver)
;    216.239.36.102                          PTR ns-gce-public3.googledomains.com (confirmed)
;    2001:4860:4802:36::66                   PTR ns-gce-public3.googledomains.com (confirmed)
;  ns-gce-public4.googledomains.com (nameserver)
;    216.239.38.102                          PTR ns-gce-public4.googledomains.com (confirmed)
;    2001:4860:4802:38::66                   PTR ns-gce-public4.googledomains.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   228.159.91.34.bc.googleusercontent.com.  ttl 120  DIFFERS
;  Google     PTR   228.159.91.34.bc.googleusercontent.com.  ttl 120  DIFFERS
;  Quad9      PTR   228.159.91.34.bc.googleusercontent.com.  ttl 120  DIFFERS
;  OpenDNS    PTR   228.159.91.34.bc.googleusercontent.com.  ttl 120  DIFFERS