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.

1.1.1.1

1.1.1.1.in-addr.arpa

Zone 1.1.1.in-addr.arpa101 queries in 2.0 s2026-11-09 05:00:46 UTCNot DNSSEC-signed

WHOIS for 1.1.1.1 →TextJSON
  • Note 1.1.1.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of alec.ns.cloudflare.com (172.64.33.59), an authoritative server: no cache in between, so these are the live values.

PTR Reverse pointer

1800PTRone.one.one.one.
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 i.root-servers.net 192.36.148.176.1 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
    • b.in-addr-servers.arpa 199.253.183.183 2001:500:87::87
    • 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
    • e.in-addr-servers.arpa 203.119.86.101 2001:dd8:6::101

    199.7.83.42 failed: NOERROR

  2. in-addr.arpa.asked f.in-addr-servers.arpa 193.0.9.112 ms

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

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

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

    199.180.182.53 failed: NOERROR

  3. 1.in-addr.arpa.asked rirns.arin.net 199.253.249.5393 ms

    Referral to 1.1.1.in-addr.arpa. unsigned delegation

    • mira.ns.cloudflare.com 108.162.192.204 172.64.32.204 173.245.58.204 2606:4700:50::adf5:3acc 2803:f800:50::6ca2:c0cc 2a06:98c1:50::ac40:20cc
    • alec.ns.cloudflare.com 108.162.193.59 172.64.33.59 173.245.59.59 2606:4700:58::adf5:3b3b 2803:f800:50::6ca2:c13b 2a06:98c1:50::ac40:213b

    No glue for mira.ns.cloudflare.com, alec.ns.cloudflare.com: addresses looked up via a resolver.

    200.3.13.14 failed: timed out

  4. 1.1.1.in-addr.arpa.asked mira.ns.cloudflare.com 108.162.192.2046.1 ms

    Answer (authoritative):

    1.1.1.1.in-addr.arpa.1800PTRone.one.one.one.

Nameservers

Every address of every nameserver, asked for 1.1.1.in-addr.arpa's SOA. "Parent" means the 1.in-addr.arpa zone delegates to it; "zone" means 1.1.1.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
alec.ns.cloudflare.comparent + zone108.162.193.59 glueauthoritative23479195067.6 ms
172.64.33.59 glueauthoritative23479195066.7 ms
173.245.59.59 glueauthoritative23479195066.7 ms
2606:4700:58::adf5:3b3b glueauthoritative23479195067.3 ms
2803:f800:50::6ca2:c13b glueauthoritative23479195067.1 ms
2a06:98c1:50::ac40:213b glueauthoritative23479195067.3 ms
mira.ns.cloudflare.comparent + zone108.162.192.204 glueauthoritative23479195066.7 ms
172.64.32.204 glueauthoritative23479195066.9 ms
173.245.58.204 glueauthoritative23479195067.4 ms
2606:4700:50::adf5:3acc glueauthoritative23479195067.6 ms
2803:f800:50::6ca2:c0cc glueauthoritative23479195067.1 ms
2a06:98c1:50::ac40:20cc glueauthoritative23479195067.2 ms

DNSSEC

1.1.1.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)
alec.ns.cloudflare.com
nameserver
108.162.193.59alec.ns.cloudflare.com ✓
172.64.33.59alec.ns.cloudflare.com ✓
173.245.59.59alec.ns.cloudflare.com ✓
2606:4700:58::adf5:3b3balec.ns.cloudflare.com ✓
2803:f800:50::6ca2:c13balec.ns.cloudflare.com ✓
2a06:98c1:50::ac40:213balec.ns.cloudflare.com ✓
mira.ns.cloudflare.com
nameserver
108.162.192.204mira.ns.cloudflare.com ✓
172.64.32.204mira.ns.cloudflare.com ✓
173.245.58.204mira.ns.cloudflare.com ✓
2606:4700:50::adf5:3accmira.ns.cloudflare.com ✓
2803:f800:50::6ca2:c0ccmira.ns.cloudflare.com ✓
2a06:98c1:50::ac40:20ccmira.ns.cloudflare.com ✓
one.one.one.one
PTR target
1.0.0.1one.one.one.one ✓
1.1.1.1one.one.one.one ✓
2606:4700:4700::1001one.one.one.one ✓
2606:4700:4700::1111one.one.one.one ✓

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 1.1.1.1one.one.one.one.
TTL 394
Google 8.8.8.8one.one.one.one.
TTL 1129
Quad9 9.9.9.9one.one.one.one.
TTL 968
OpenDNS 208.67.222.222one.one.one.one.
TTL 834

Text dump

; DNS report for 1.1.1.1.in-addr.arpa (1.1.1.1)
; 2026-11-09 05:00:46 UTC, 101 queries in 2.01 s, zone 1.1.1.in-addr.arpa

;; FINDINGS
;  [INFO] 1.1.1.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from alec.ns.cloudflare.com (172.64.33.59))
1.1.1.1.in-addr.arpa.	1800	IN	PTR	one.one.one.one.

;; TRACE
;  1.1.1.1.in-addr.arpa PTR
;  . @i.root-servers.net (192.36.148.17) 6.1 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	b.in-addr-servers.arpa.	; 199.253.183.183 2001:500:87::87
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	e.in-addr-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
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	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
in-addr.arpa.	86400	IN	DS	53696 8 2 13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D424F04DF
;  in-addr.arpa. @f.in-addr-servers.arpa (193.0.9.1) 12 ms [NOERROR qr]: referral to 1.in-addr.arpa.
1.in-addr.arpa.		NS	rirns.arin.net.	; 199.253.249.53 2620:38:2000::53
1.in-addr.arpa.		NS	ns1.apnic.net.	; 203.119.42.53 2001:dd8:e::53
1.in-addr.arpa.		NS	ns3.lacnic.net.	; 200.3.13.14 2001:13c7:7002:3000::14
1.in-addr.arpa.		NS	ns2.apnic.net.	; 203.119.95.53 2001:ddd::53
1.in-addr.arpa.		NS	apnic.authdns.ripe.net.	; 193.0.9.9 2a13:27c0:30::9
1.in-addr.arpa.	86400	IN	DS	43707 13 2 90867C2CAA60E545F8178736BEA481492C81D544FDAE2FFDA0BB17ECC57D3017
;  1.in-addr.arpa. @rirns.arin.net (199.253.249.53) 93 ms [NOERROR qr]: referral to 1.1.1.in-addr.arpa.
1.1.1.in-addr.arpa.		NS	mira.ns.cloudflare.com.	; 108.162.192.204 172.64.32.204 173.245.58.204 2606:4700:50::adf5:3acc 2803:f800:50::6ca2:c0cc 2a06:98c1:50::ac40:20cc
1.1.1.in-addr.arpa.		NS	alec.ns.cloudflare.com.	; 108.162.193.59 172.64.33.59 173.245.59.59 2606:4700:58::adf5:3b3b 2803:f800:50::6ca2:c13b 2a06:98c1:50::ac40:213b
;  1.1.1.in-addr.arpa. @mira.ns.cloudflare.com (108.162.192.204) 6.1 ms [NOERROR qr aa]: answer
1.1.1.1.in-addr.arpa.	1800	IN	PTR	one.one.one.one.

;; NAMESERVERS (SOA asked of each address)
;  alec.ns.cloudflare.com [parent+zone]
;    108.162.193.59                          ok                        2347919506  7.6 ms
;    172.64.33.59                            ok                        2347919506  6.7 ms
;    173.245.59.59                           ok                        2347919506  6.7 ms
;    2606:4700:58::adf5:3b3b                 ok                        2347919506  7.3 ms
;    2803:f800:50::6ca2:c13b                 ok                        2347919506  7.1 ms
;    2a06:98c1:50::ac40:213b                 ok                        2347919506  7.3 ms
;  mira.ns.cloudflare.com [parent+zone]
;    108.162.192.204                         ok                        2347919506  6.7 ms
;    172.64.32.204                           ok                        2347919506  6.9 ms
;    173.245.58.204                          ok                        2347919506  7.4 ms
;    2606:4700:50::adf5:3acc                 ok                        2347919506  7.6 ms
;    2803:f800:50::6ca2:c0cc                 ok                        2347919506  7.1 ms
;    2a06:98c1:50::ac40:20cc                 ok                        2347919506  7.2 ms

;; DNSSEC: unsigned

;; HOSTS
;  alec.ns.cloudflare.com (nameserver)
;    108.162.193.59                          PTR alec.ns.cloudflare.com (confirmed)
;    172.64.33.59                            PTR alec.ns.cloudflare.com (confirmed)
;    173.245.59.59                           PTR alec.ns.cloudflare.com (confirmed)
;    2606:4700:58::adf5:3b3b                 PTR alec.ns.cloudflare.com (confirmed)
;    2803:f800:50::6ca2:c13b                 PTR alec.ns.cloudflare.com (confirmed)
;    2a06:98c1:50::ac40:213b                 PTR alec.ns.cloudflare.com (confirmed)
;  mira.ns.cloudflare.com (nameserver)
;    108.162.192.204                         PTR mira.ns.cloudflare.com (confirmed)
;    172.64.32.204                           PTR mira.ns.cloudflare.com (confirmed)
;    173.245.58.204                          PTR mira.ns.cloudflare.com (confirmed)
;    2606:4700:50::adf5:3acc                 PTR mira.ns.cloudflare.com (confirmed)
;    2803:f800:50::6ca2:c0cc                 PTR mira.ns.cloudflare.com (confirmed)
;    2a06:98c1:50::ac40:20cc                 PTR mira.ns.cloudflare.com (confirmed)
;  one.one.one.one (PTR target)
;    1.0.0.1                                 PTR one.one.one.one (confirmed)
;    1.1.1.1                                 PTR one.one.one.one (confirmed)
;    2606:4700:4700::1001                    PTR one.one.one.one (confirmed)
;    2606:4700:4700::1111                    PTR one.one.one.one (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   one.one.one.one.  ttl 394
;  Google     PTR   one.one.one.one.  ttl 1129
;  Quad9      PTR   one.one.one.one.  ttl 968
;  OpenDNS    PTR   one.one.one.one.  ttl 834