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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.

148.163.254.1

1.254.163.148.in-addr.arpa

Zone 254.163.148.in-addr.arpa140 queries in 1.8 s2026-11-09 05:55:08 UTCNot DNSSEC-signed

WHOIS for 148.163.254.1 →TextJSON
  • Warning The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.dns.williamhill, ns02.dns.williamhill, ns03.dns.williamhill, ns04.dns.williamhill but 254.163.148.in-addr.arpa itself lists dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.dns.williamhill, ns02.dns.williamhill, ns03.dns.williamhill, ns04.dns.williamhill. Make the two lists match.
  • Note 254.163.148.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of dns4.p03.nsone.net (198.51.45.67), an authoritative server: no cache in between, so these are the live values.

PTR Reverse pointer

3600PTRns01.dns.williamhill.
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 k.root-servers.net 193.0.14.12939 ms

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

    • f.in-addr-servers.arpa 193.0.9.1 2a13:27c0:30::1
    • c.in-addr-servers.arpa 196.216.169.10 2001:43f8:110::10
    • 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
    • e.in-addr-servers.arpa 203.119.86.101 2001:dd8:6::101

    170.247.170.2 failed: NOERROR

  2. in-addr.arpa.asked a.in-addr-servers.arpa 199.180.182.5389 ms

    Referral to 148.in-addr.arpa. signed (1 DS)

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

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

  3. 148.in-addr.arpa.asked y.arin.net 192.82.134.306.6 ms

    Referral to 254.163.148.in-addr.arpa. unsigned delegation

    • ns03.dns.williamhill 148.163.254.129
    • ns01.dns.williamhill 148.163.254.1
    • dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
    • dns3.p01.nsone.net 198.51.44.65 2620:4d:4000:6259:7:1:0:3
    • ns04.dns.williamhill 148.163.254.193
    • ns02.dns.williamhill 148.163.254.65
    • dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
    • dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2

    No glue for ns03.dns.williamhill, ns01.dns.williamhill, dns1.p01.nsone.net, dns3.p01.nsone.net, ns04.dns.williamhill, ns02.dns.williamhill, dns4.p01.nsone.net, dns2.p01.nsone.net: addresses looked up via a resolver.

    199.180.180.63 failed: NOERROR

  4. 254.163.148.in-addr.arpa.asked dns3.p01.nsone.net 198.51.44.6514 ms

    Answer (authoritative):

    1.254.163.148.in-addr.arpa.3600PTRns01.dns.williamhill.

    148.163.254.1 failed: NOERROR

Nameservers

Every address of every nameserver, asked for 254.163.148.in-addr.arpa's SOA. "Parent" means the 148.in-addr.arpa zone delegates to it; "zone" means 254.163.148.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p01.nsone.netparent198.51.44.1 glueauthoritative152573846616 ms
2620:4d:4000:6259:7:1:0:1 glueauthoritative152573846614 ms
dns1.p03.nsone.netzone198.51.44.3authoritative152573846614 ms
2620:4d:4000:6259:7:3:0:1authoritative152573846614 ms
dns2.p01.nsone.netparent198.51.45.1 glueauthoritative15257384666.3 ms
2a00:edc0:6259:7:1::2 glueauthoritative152573846613 ms
dns2.p03.nsone.netzone198.51.45.3authoritative15257384666.1 ms
2a00:edc0:6259:7:3::2authoritative152573846612 ms
dns3.p01.nsone.netparent198.51.44.65 glueauthoritative152573846613 ms
2620:4d:4000:6259:7:1:0:3 glueauthoritative152573846613 ms
dns3.p03.nsone.netzone198.51.44.67authoritative152573846612 ms
2620:4d:4000:6259:7:3:0:3authoritative152573846614 ms
dns4.p01.nsone.netparent198.51.45.65 glueauthoritative15257384666.8 ms
2a00:edc0:6259:7:1::4 glueauthoritative152573846614 ms
dns4.p03.nsone.netzone198.51.45.67authoritative15257384665.9 ms
2a00:edc0:6259:7:3::4authoritative152573846613 ms
ns01.dns.williamhillparent + zone148.163.254.1 glueauthoritative152573846616 ms
ns02.dns.williamhillparent + zone148.163.254.65 glueauthoritative152573846616 ms
ns03.dns.williamhillparent + zone148.163.254.129 glueauthoritative152573846616 ms
ns04.dns.williamhillparent + zone148.163.254.193 glueauthoritative152573846616 ms

DNSSEC

254.163.148.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)
dns1.p01.nsone.net
nameserver
198.51.44.1dns1.p01.nsone.net ✓
2620:4d:4000:6259:7:1:0:1dns1.p01.nsone.net ✓
dns1.p03.nsone.net
nameserver
198.51.44.3dns1.p03.nsone.net ✓
2620:4d:4000:6259:7:3:0:1dns1.p03.nsone.net ✓
dns2.p01.nsone.net
nameserver
198.51.45.1dns2.p01.nsone.net ✓
2a00:edc0:6259:7:1::2dns2.p01.nsone.net ✓
dns2.p03.nsone.net
nameserver
198.51.45.3dns2.p03.nsone.net ✓
2a00:edc0:6259:7:3::2dns2.p03.nsone.net ✓
dns3.p01.nsone.net
nameserver
198.51.44.65dns3.p01.nsone.net ✓
2620:4d:4000:6259:7:1:0:3dns3.p01.nsone.net ✓
dns3.p03.nsone.net
nameserver
198.51.44.67dns3.p03.nsone.net ✓
2620:4d:4000:6259:7:3:0:3dns3.p03.nsone.net ✓
dns4.p01.nsone.net
nameserver
198.51.45.65dns4.p01.nsone.net ✓
2a00:edc0:6259:7:1::4dns4.p01.nsone.net ✓
dns4.p03.nsone.net
nameserver
198.51.45.67dns4.p03.nsone.net ✓
2a00:edc0:6259:7:3::4dns4.p03.nsone.net ✓
ns01.dns.williamhill
nameserver · PTR target
148.163.254.1ns01.dns.williamhill ✓
ns02.dns.williamhill
nameserver
148.163.254.65ns02.dns.williamhill ✓
ns03.dns.williamhill
nameserver
148.163.254.129ns03.dns.williamhill ✓
ns04.dns.williamhill
nameserver
148.163.254.193ns04.dns.williamhill ✓

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 1.1.1.1ns01.dns.williamhill.
TTL 3600
Google 8.8.8.8ns01.dns.williamhill.
TTL 3600
Quad9 9.9.9.9ns01.dns.williamhill.
TTL 3600
OpenDNS 208.67.222.222ns01.dns.williamhill.
TTL 3600

Text dump

; DNS report for 1.254.163.148.in-addr.arpa (148.163.254.1)
; 2026-11-09 05:55:08 UTC, 140 queries in 1.82 s, zone 254.163.148.in-addr.arpa

;; FINDINGS
;  [WARN] The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.dns.williamhill, ns02.dns.williamhill, ns03.dns.williamhill, ns04.dns.williamhill but 254.163.148.in-addr.arpa itself lists dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.dns.williamhill, ns02.dns.williamhill, ns03.dns.williamhill, ns04.dns.williamhill. Make the two lists match.
;  [INFO] 254.163.148.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from dns4.p03.nsone.net (198.51.45.67))
1.254.163.148.in-addr.arpa.	3600	IN	PTR	ns01.dns.williamhill.

;; TRACE
;  1.254.163.148.in-addr.arpa PTR
;  . @k.root-servers.net (193.0.14.129) 39 ms [NOERROR qr]: referral to in-addr.arpa.
in-addr.arpa.		NS	f.in-addr-servers.arpa.	; 193.0.9.1 2a13:27c0:30::1
in-addr.arpa.		NS	c.in-addr-servers.arpa.	; 196.216.169.10 2001:43f8:110::10
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	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	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. @a.in-addr-servers.arpa (199.180.182.53) 89 ms [NOERROR qr]: referral to 148.in-addr.arpa.
148.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
148.in-addr.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
148.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
148.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
148.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
148.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
148.in-addr.arpa.	86400	IN	DS	18451 8 2 16C0B095D3DDB9F9F85DB0FAEAA87823F9FE847BC07E514C48F7E78E23A712F7
;  148.in-addr.arpa. @y.arin.net (192.82.134.30) 6.6 ms [NOERROR qr]: referral to 254.163.148.in-addr.arpa.
254.163.148.in-addr.arpa.		NS	ns03.dns.williamhill.	; 148.163.254.129
254.163.148.in-addr.arpa.		NS	ns01.dns.williamhill.	; 148.163.254.1
254.163.148.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
254.163.148.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
254.163.148.in-addr.arpa.		NS	ns04.dns.williamhill.	; 148.163.254.193
254.163.148.in-addr.arpa.		NS	ns02.dns.williamhill.	; 148.163.254.65
254.163.148.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
254.163.148.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
;  254.163.148.in-addr.arpa. @dns3.p01.nsone.net (198.51.44.65) 14 ms [NOERROR qr aa]: answer
1.254.163.148.in-addr.arpa.	3600	IN	PTR	ns01.dns.williamhill.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             ok                        1525738466  16 ms
;    2620:4d:4000:6259:7:1:0:1               ok                        1525738466  14 ms
;  dns1.p03.nsone.net [zone]
;    198.51.44.3                             ok                        1525738466  14 ms
;    2620:4d:4000:6259:7:3:0:1               ok                        1525738466  14 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             ok                        1525738466  6.3 ms
;    2a00:edc0:6259:7:1::2                   ok                        1525738466  13 ms
;  dns2.p03.nsone.net [zone]
;    198.51.45.3                             ok                        1525738466  6.1 ms
;    2a00:edc0:6259:7:3::2                   ok                        1525738466  12 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            ok                        1525738466  13 ms
;    2620:4d:4000:6259:7:1:0:3               ok                        1525738466  13 ms
;  dns3.p03.nsone.net [zone]
;    198.51.44.67                            ok                        1525738466  12 ms
;    2620:4d:4000:6259:7:3:0:3               ok                        1525738466  14 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            ok                        1525738466  6.8 ms
;    2a00:edc0:6259:7:1::4                   ok                        1525738466  14 ms
;  dns4.p03.nsone.net [zone]
;    198.51.45.67                            ok                        1525738466  5.9 ms
;    2a00:edc0:6259:7:3::4                   ok                        1525738466  13 ms
;  ns01.dns.williamhill [parent+zone]
;    148.163.254.1                           ok                        1525738466  16 ms
;  ns02.dns.williamhill [parent+zone]
;    148.163.254.65                          ok                        1525738466  16 ms
;  ns03.dns.williamhill [parent+zone]
;    148.163.254.129                         ok                        1525738466  16 ms
;  ns04.dns.williamhill [parent+zone]
;    148.163.254.193                         ok                        1525738466  16 ms

;; DNSSEC: unsigned

;; HOSTS
;  dns1.p01.nsone.net (nameserver)
;    198.51.44.1                             PTR dns1.p01.nsone.net (confirmed)
;    2620:4d:4000:6259:7:1:0:1               PTR dns1.p01.nsone.net (confirmed)
;  dns1.p03.nsone.net (nameserver)
;    198.51.44.3                             PTR dns1.p03.nsone.net (confirmed)
;    2620:4d:4000:6259:7:3:0:1               PTR dns1.p03.nsone.net (confirmed)
;  dns2.p01.nsone.net (nameserver)
;    198.51.45.1                             PTR dns2.p01.nsone.net (confirmed)
;    2a00:edc0:6259:7:1::2                   PTR dns2.p01.nsone.net (confirmed)
;  dns2.p03.nsone.net (nameserver)
;    198.51.45.3                             PTR dns2.p03.nsone.net (confirmed)
;    2a00:edc0:6259:7:3::2                   PTR dns2.p03.nsone.net (confirmed)
;  dns3.p01.nsone.net (nameserver)
;    198.51.44.65                            PTR dns3.p01.nsone.net (confirmed)
;    2620:4d:4000:6259:7:1:0:3               PTR dns3.p01.nsone.net (confirmed)
;  dns3.p03.nsone.net (nameserver)
;    198.51.44.67                            PTR dns3.p03.nsone.net (confirmed)
;    2620:4d:4000:6259:7:3:0:3               PTR dns3.p03.nsone.net (confirmed)
;  dns4.p01.nsone.net (nameserver)
;    198.51.45.65                            PTR dns4.p01.nsone.net (confirmed)
;    2a00:edc0:6259:7:1::4                   PTR dns4.p01.nsone.net (confirmed)
;  dns4.p03.nsone.net (nameserver)
;    198.51.45.67                            PTR dns4.p03.nsone.net (confirmed)
;    2a00:edc0:6259:7:3::4                   PTR dns4.p03.nsone.net (confirmed)
;  ns01.dns.williamhill (nameserver; PTR target)
;    148.163.254.1                           PTR ns01.dns.williamhill (confirmed)
;  ns02.dns.williamhill (nameserver)
;    148.163.254.65                          PTR ns02.dns.williamhill (confirmed)
;  ns03.dns.williamhill (nameserver)
;    148.163.254.129                         PTR ns03.dns.williamhill (confirmed)
;  ns04.dns.williamhill (nameserver)
;    148.163.254.193                         PTR ns04.dns.williamhill (confirmed)

;; PUBLIC RESOLVERS
;  Cloudflare PTR   ns01.dns.williamhill.  ttl 3600
;  Google     PTR   ns01.dns.williamhill.  ttl 3600
;  Quad9      PTR   ns01.dns.williamhill.  ttl 3600
;  OpenDNS    PTR   ns01.dns.williamhill.  ttl 3600