Made in / Donate

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.

172.64.33.206

206.33.64.172.in-addr.arpa

Zone 64.172.in-addr.arpa105 queries in 1.9 s2026-11-09 05:40:47 UTCNot DNSSEC-signed

WHOIS for 172.64.33.206 →TextJSON
  • Note 64.172.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of cruz.ns.cloudflare.com (108.162.192.88), an authoritative server: no cache in between, so these are the live values.

PTR Reverse pointer

1800PTRmicah.ns.cloudflare.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 m.root-servers.net 202.12.27.3315 ms

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

    • 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
    • e.in-addr-servers.arpa 203.119.86.101 2001:dd8:6::101
    • d.in-addr-servers.arpa 200.10.60.53 2001:13c7:7010::53
    • 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

    192.203.230.10 failed: NOERROR

  2. in-addr.arpa.asked a.in-addr-servers.arpa 199.180.182.5393 ms

    Referral to 172.in-addr.arpa. signed (1 DS)

    • y.arin.net 192.82.134.30 2001:500:127::30
    • arin.authdns.ripe.net 193.0.9.10 2a13:27c0:30::10
    • r.arin.net 199.180.180.63 2001:500:f0::63
    • x.arin.net 199.180.180.63 2001:500:f0::63
    • u.arin.net 204.61.216.50 2001:500:14:6050:ad::1
    • z.arin.net 199.180.180.63 2001:500:f0::63

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

    200.10.60.53 failed: NOERROR

  3. 172.in-addr.arpa.asked y.arin.net 192.82.134.306.3 ms

    Referral to 64.172.in-addr.arpa. unsigned delegation

    • cruz.ns.cloudflare.com 108.162.192.88 172.64.32.88 173.245.58.88 2606:4700:50::adf5:3a58 2803:f800:50::6ca2:c058 2a06:98c1:50::ac40:2058
    • kevin.ns.cloudflare.com 108.162.193.191 172.64.33.191 173.245.59.191 2606:4700:58::adf5:3bbf 2803:f800:50::6ca2:c1bf 2a06:98c1:50::ac40:21bf

    No glue for cruz.ns.cloudflare.com, kevin.ns.cloudflare.com: addresses looked up via a resolver.

    199.180.180.63 failed: NOERROR

  4. 64.172.in-addr.arpa.asked cruz.ns.cloudflare.com 172.64.32.886.5 ms

    Answer (authoritative):

    206.33.64.172.in-addr.arpa.1800PTRmicah.ns.cloudflare.com.

Nameservers

Every address of every nameserver, asked for 64.172.in-addr.arpa's SOA. "Parent" means the 172.in-addr.arpa zone delegates to it; "zone" means 64.172.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
cruz.ns.cloudflare.comparent + zone108.162.192.88 glueauthoritative23873999596.2 ms
172.64.32.88 glueauthoritative23873999596.5 ms
173.245.58.88 glueauthoritative23873999596.4 ms
2606:4700:50::adf5:3a58 glueauthoritative23873999596.3 ms
2803:f800:50::6ca2:c058 glueauthoritative23873999596.2 ms
2a06:98c1:50::ac40:2058 glueauthoritative23873999595.9 ms
kevin.ns.cloudflare.comparent + zone108.162.193.191 glueauthoritative23873999596.4 ms
172.64.33.191 glueauthoritative23873999596.3 ms
173.245.59.191 glueauthoritative23873999596.7 ms
2606:4700:58::adf5:3bbf glueauthoritative23873999596.3 ms
2803:f800:50::6ca2:c1bf glueauthoritative23873999596.8 ms
2a06:98c1:50::ac40:21bf glueauthoritative23873999596.2 ms

DNSSEC

64.172.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)
cruz.ns.cloudflare.com
nameserver
108.162.192.88cruz.ns.cloudflare.com ✓
172.64.32.88cruz.ns.cloudflare.com ✓
173.245.58.88cruz.ns.cloudflare.com ✓
2606:4700:50::adf5:3a58cruz.ns.cloudflare.com ✓
2803:f800:50::6ca2:c058cruz.ns.cloudflare.com ✓
2a06:98c1:50::ac40:2058cruz.ns.cloudflare.com ✓
kevin.ns.cloudflare.com
nameserver
108.162.193.191kevin.ns.cloudflare.com ✓
172.64.33.191kevin.ns.cloudflare.com ✓
173.245.59.191kevin.ns.cloudflare.com ✓
2606:4700:58::adf5:3bbfkevin.ns.cloudflare.com ✓
2803:f800:50::6ca2:c1bfkevin.ns.cloudflare.com ✓
2a06:98c1:50::ac40:21bfkevin.ns.cloudflare.com ✓
micah.ns.cloudflare.com
PTR target
108.162.193.206micah.ns.cloudflare.com ✓
172.64.33.206micah.ns.cloudflare.com ✓
173.245.59.206micah.ns.cloudflare.com ✓
2606:4700:58::adf5:3bcemicah.ns.cloudflare.com ✓
2803:f800:50::6ca2:c1cemicah.ns.cloudflare.com ✓
2a06:98c1:50::ac40:21cemicah.ns.cloudflare.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 1.1.1.1micah.ns.cloudflare.com.
TTL 1800
Google 8.8.8.8micah.ns.cloudflare.com.
TTL 324
Quad9 9.9.9.9timed out
OpenDNS 208.67.222.222micah.ns.cloudflare.com.
TTL 1800

Text dump

; DNS report for 206.33.64.172.in-addr.arpa (172.64.33.206)
; 2026-11-09 05:40:47 UTC, 105 queries in 1.91 s, zone 64.172.in-addr.arpa

;; FINDINGS
;  [INFO] 64.172.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from cruz.ns.cloudflare.com (108.162.192.88))
206.33.64.172.in-addr.arpa.	1800	IN	PTR	micah.ns.cloudflare.com.

;; TRACE
;  206.33.64.172.in-addr.arpa PTR
;  . @m.root-servers.net (202.12.27.33) 15 ms [NOERROR qr]: referral to in-addr.arpa.
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	e.in-addr-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
in-addr.arpa.		NS	d.in-addr-servers.arpa.	; 200.10.60.53 2001:13c7:7010::53
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.	86400	IN	DS	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
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. @a.in-addr-servers.arpa (199.180.182.53) 93 ms [NOERROR qr]: referral to 172.in-addr.arpa.
172.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
172.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
172.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
172.in-addr.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
172.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
172.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
172.in-addr.arpa.	86400	IN	DS	34240 8 2 251F12CE69BDCDD431B87F23FAEE9A81B5CD99FBCE23EA58E2C33A3189F3A555
;  172.in-addr.arpa. @y.arin.net (192.82.134.30) 6.3 ms [NOERROR qr]: referral to 64.172.in-addr.arpa.
64.172.in-addr.arpa.		NS	cruz.ns.cloudflare.com.	; 108.162.192.88 172.64.32.88 173.245.58.88 2606:4700:50::adf5:3a58 2803:f800:50::6ca2:c058 2a06:98c1:50::ac40:2058
64.172.in-addr.arpa.		NS	kevin.ns.cloudflare.com.	; 108.162.193.191 172.64.33.191 173.245.59.191 2606:4700:58::adf5:3bbf 2803:f800:50::6ca2:c1bf 2a06:98c1:50::ac40:21bf
;  64.172.in-addr.arpa. @cruz.ns.cloudflare.com (172.64.32.88) 6.5 ms [NOERROR qr aa]: answer
206.33.64.172.in-addr.arpa.	1800	IN	PTR	micah.ns.cloudflare.com.

;; NAMESERVERS (SOA asked of each address)
;  cruz.ns.cloudflare.com [parent+zone]
;    108.162.192.88                          ok                        2387399959  6.2 ms
;    172.64.32.88                            ok                        2387399959  6.5 ms
;    173.245.58.88                           ok                        2387399959  6.4 ms
;    2606:4700:50::adf5:3a58                 ok                        2387399959  6.3 ms
;    2803:f800:50::6ca2:c058                 ok                        2387399959  6.2 ms
;    2a06:98c1:50::ac40:2058                 ok                        2387399959  5.9 ms
;  kevin.ns.cloudflare.com [parent+zone]
;    108.162.193.191                         ok                        2387399959  6.4 ms
;    172.64.33.191                           ok                        2387399959  6.3 ms
;    173.245.59.191                          ok                        2387399959  6.7 ms
;    2606:4700:58::adf5:3bbf                 ok                        2387399959  6.3 ms
;    2803:f800:50::6ca2:c1bf                 ok                        2387399959  6.8 ms
;    2a06:98c1:50::ac40:21bf                 ok                        2387399959  6.2 ms

;; DNSSEC: unsigned

;; HOSTS
;  cruz.ns.cloudflare.com (nameserver)
;    108.162.192.88                          PTR cruz.ns.cloudflare.com (confirmed)
;    172.64.32.88                            PTR cruz.ns.cloudflare.com (confirmed)
;    173.245.58.88                           PTR cruz.ns.cloudflare.com (confirmed)
;    2606:4700:50::adf5:3a58                 PTR cruz.ns.cloudflare.com (confirmed)
;    2803:f800:50::6ca2:c058                 PTR cruz.ns.cloudflare.com (confirmed)
;    2a06:98c1:50::ac40:2058                 PTR cruz.ns.cloudflare.com (confirmed)
;  kevin.ns.cloudflare.com (nameserver)
;    108.162.193.191                         PTR kevin.ns.cloudflare.com (confirmed)
;    172.64.33.191                           PTR kevin.ns.cloudflare.com (confirmed)
;    173.245.59.191                          PTR kevin.ns.cloudflare.com (confirmed)
;    2606:4700:58::adf5:3bbf                 PTR kevin.ns.cloudflare.com (confirmed)
;    2803:f800:50::6ca2:c1bf                 PTR kevin.ns.cloudflare.com (confirmed)
;    2a06:98c1:50::ac40:21bf                 PTR kevin.ns.cloudflare.com (confirmed)
;  micah.ns.cloudflare.com (PTR target)
;    108.162.193.206                         PTR micah.ns.cloudflare.com (confirmed)
;    172.64.33.206                           PTR micah.ns.cloudflare.com (confirmed)
;    173.245.59.206                          PTR micah.ns.cloudflare.com (confirmed)
;    2606:4700:58::adf5:3bce                 PTR micah.ns.cloudflare.com (confirmed)
;    2803:f800:50::6ca2:c1ce                 PTR micah.ns.cloudflare.com (confirmed)
;    2a06:98c1:50::ac40:21ce                 PTR micah.ns.cloudflare.com (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   micah.ns.cloudflare.com.  ttl 1800
;  Google     PTR   micah.ns.cloudflare.com.  ttl 324
;  Quad9      PTR   timed out
;  OpenDNS    PTR   micah.ns.cloudflare.com.  ttl 1800