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.

148.163.205.1

1.205.163.148.in-addr.arpa

Zone 205.163.148.in-addr.arpa152 queries in 1.1 s2026-11-09 05:55:05 UTCNot DNSSEC-signed

WHOIS for 148.163.205.1 →TextJSON
  • Warning The parent zone delegates to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.everbridgedns.net, ns02.everbridgedns.net, ns03.everbridgedns.net, ns04.everbridgedns.net but 205.163.148.in-addr.arpa itself lists dns1.p04.nsone.net, dns2.p04.nsone.net, dns3.p04.nsone.net, dns4.p04.nsone.net, ns01.everbridgedns.net, ns02.everbridgedns.net, ns03.everbridgedns.net, ns04.everbridgedns.net. Make the two lists match.
  • Note 205.163.148.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Records

Asked directly of dns2.p01.nsone.net (198.51.45.1), an authoritative server: no cache in between, so these are the live values.

PTR Reverse pointer

3600PTRns01.everbridgedns.net.
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 a.root-servers.net 198.41.0.412 ms

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

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

    200.10.60.53 failed: NOERROR

  3. 148.in-addr.arpa.asked y.arin.net 192.82.134.306.2 ms

    Referral to 205.163.148.in-addr.arpa. unsigned delegation

    • ns04.everbridgedns.net 148.163.205.193 2607:f740:e623:c::1
    • dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2
    • dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
    • ns02.everbridgedns.net 148.163.205.65 2607:f740:e623:4::1
    • ns03.everbridgedns.net 148.163.205.129 2607:f740:e623:8::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
    • ns01.everbridgedns.net 148.163.205.1 2607:f740:e623::1

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

  4. 205.163.148.in-addr.arpa.asked dns2.p01.nsone.net 198.51.45.16.1 ms

    Answer (authoritative):

    1.205.163.148.in-addr.arpa.3600PTRns01.everbridgedns.net.

    198.51.44.65 failed: NOERROR

Nameservers

Every address of every nameserver, asked for 205.163.148.in-addr.arpa's SOA. "Parent" means the 148.in-addr.arpa zone delegates to it; "zone" means 205.163.148.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p01.nsone.netparent198.51.44.1 glueauthoritative160100346815 ms
2620:4d:4000:6259:7:1:0:1 glueauthoritative160100346814 ms
dns1.p04.nsone.netzone198.51.44.4authoritative160100346814 ms
2620:4d:4000:6259:7:4:0:1authoritative160100346815 ms
dns2.p01.nsone.netparent198.51.45.1 glueauthoritative16010034686.5 ms
2a00:edc0:6259:7:1::2 glueauthoritative160100346813 ms
dns2.p04.nsone.netzone198.51.45.4authoritative16010034687.5 ms
2a00:edc0:6259:7:4::2authoritative160100346814 ms
dns3.p01.nsone.netparent198.51.44.65 glueauthoritative160100346816 ms
2620:4d:4000:6259:7:1:0:3 glueauthoritative160100346815 ms
dns3.p04.nsone.netzone198.51.44.68authoritative160100346815 ms
2620:4d:4000:6259:7:4:0:3authoritative160100346816 ms
dns4.p01.nsone.netparent198.51.45.65 glueauthoritative16010034686.9 ms
2a00:edc0:6259:7:1::4 glueauthoritative160100346815 ms
dns4.p04.nsone.netzone198.51.45.68authoritative16010034687.6 ms
2a00:edc0:6259:7:4::4authoritative160100346814 ms
ns01.everbridgedns.netparent + zone148.163.205.1 glueauthoritative160100346892 ms
2607:f740:e623::1 glueauthoritative160100346814 ms
ns02.everbridgedns.netparent + zone148.163.205.65 glueauthoritative160100346892 ms
2607:f740:e623:4::1 glueauthoritative160100346814 ms
ns03.everbridgedns.netparent + zone148.163.205.129 glueauthoritative160100346891 ms
2607:f740:e623:8::1 glueauthoritative160100346814 ms
ns04.everbridgedns.netparent + zone148.163.205.193 glueauthoritative160100346892 ms
2607:f740:e623:c::1 glueauthoritative160100346814 ms

DNSSEC

205.163.148.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.p04.nsone.net
nameserver
198.51.44.4dns1.p04.nsone.net ✓
2620:4d:4000:6259:7:4:0:1dns1.p04.nsone.net ✓
dns2.p01.nsone.net
nameserver
198.51.45.1dns2.p01.nsone.net ✓
2a00:edc0:6259:7:1::2dns2.p01.nsone.net ✓
dns2.p04.nsone.net
nameserver
198.51.45.4dns2.p04.nsone.net ✓
2a00:edc0:6259:7:4::2dns2.p04.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.p04.nsone.net
nameserver
198.51.44.68dns3.p04.nsone.net ✓
2620:4d:4000:6259:7:4:0:3dns3.p04.nsone.net ✓
dns4.p01.nsone.net
nameserver
198.51.45.65dns4.p01.nsone.net ✓
2a00:edc0:6259:7:1::4dns4.p01.nsone.net ✓
dns4.p04.nsone.net
nameserver
198.51.45.68dns4.p04.nsone.net ✓
2a00:edc0:6259:7:4::4dns4.p04.nsone.net ✓
ns01.everbridgedns.net
nameserver · PTR target
148.163.205.1ns01.everbridgedns.net ✓
2607:f740:e623::1none
ns02.everbridgedns.net
nameserver
148.163.205.65ns02.everbridgedns.net ✓
2607:f740:e623:4::1none
ns03.everbridgedns.net
nameserver
148.163.205.129ns03.everbridgedns.net ✓
2607:f740:e623:8::1none
ns04.everbridgedns.net
nameserver
148.163.205.193ns04.everbridgedns.net ✓
2607:f740:e623:c::1none

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.everbridgedns.net.
TTL 3600
Google 8.8.8.8ns01.everbridgedns.net.
TTL 3600
Quad9 9.9.9.9ns01.everbridgedns.net.
TTL 3600
OpenDNS 208.67.222.222ns01.everbridgedns.net.
TTL 3600

Text dump

; DNS report for 1.205.163.148.in-addr.arpa (148.163.205.1)
; 2026-11-09 05:55:05 UTC, 152 queries in 1.12 s, zone 205.163.148.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.everbridgedns.net, ns02.everbridgedns.net, ns03.everbridgedns.net, ns04.everbridgedns.net but 205.163.148.in-addr.arpa itself lists dns1.p04.nsone.net, dns2.p04.nsone.net, dns3.p04.nsone.net, dns4.p04.nsone.net, ns01.everbridgedns.net, ns02.everbridgedns.net, ns03.everbridgedns.net, ns04.everbridgedns.net. Make the two lists match.
;  [INFO] 205.163.148.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; RECORDS (authoritative, from dns2.p01.nsone.net (198.51.45.1))
1.205.163.148.in-addr.arpa.	3600	IN	PTR	ns01.everbridgedns.net.

;; TRACE
;  1.205.163.148.in-addr.arpa PTR
;  . @a.root-servers.net (198.41.0.4) 12 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	b.in-addr-servers.arpa.	; 199.253.183.183 2001:500:87::87
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	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	53696 8 2 13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D424F04DF
in-addr.arpa.	86400	IN	DS	54956 8 2 E0E2BF5CFBD66572CA05EC18267D91509BA6A9405AF05C3FD4141DFA45200C08
in-addr.arpa.	86400	IN	DS	47054 8 2 5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F281CBC6F2
;  in-addr.arpa. @f.in-addr-servers.arpa (193.0.9.1) 11 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) 6.2 ms [NOERROR qr]: referral to 205.163.148.in-addr.arpa.
205.163.148.in-addr.arpa.		NS	ns04.everbridgedns.net.	; 148.163.205.193 2607:f740:e623:c::1
205.163.148.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
205.163.148.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
205.163.148.in-addr.arpa.		NS	ns02.everbridgedns.net.	; 148.163.205.65 2607:f740:e623:4::1
205.163.148.in-addr.arpa.		NS	ns03.everbridgedns.net.	; 148.163.205.129 2607:f740:e623:8::1
205.163.148.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
205.163.148.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
205.163.148.in-addr.arpa.		NS	ns01.everbridgedns.net.	; 148.163.205.1 2607:f740:e623::1
;  205.163.148.in-addr.arpa. @dns2.p01.nsone.net (198.51.45.1) 6.1 ms [NOERROR qr aa]: answer
1.205.163.148.in-addr.arpa.	3600	IN	PTR	ns01.everbridgedns.net.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             ok                        1601003468  15 ms
;    2620:4d:4000:6259:7:1:0:1               ok                        1601003468  14 ms
;  dns1.p04.nsone.net [zone]
;    198.51.44.4                             ok                        1601003468  14 ms
;    2620:4d:4000:6259:7:4:0:1               ok                        1601003468  15 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             ok                        1601003468  6.5 ms
;    2a00:edc0:6259:7:1::2                   ok                        1601003468  13 ms
;  dns2.p04.nsone.net [zone]
;    198.51.45.4                             ok                        1601003468  7.5 ms
;    2a00:edc0:6259:7:4::2                   ok                        1601003468  14 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            ok                        1601003468  16 ms
;    2620:4d:4000:6259:7:1:0:3               ok                        1601003468  15 ms
;  dns3.p04.nsone.net [zone]
;    198.51.44.68                            ok                        1601003468  15 ms
;    2620:4d:4000:6259:7:4:0:3               ok                        1601003468  16 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            ok                        1601003468  6.9 ms
;    2a00:edc0:6259:7:1::4                   ok                        1601003468  15 ms
;  dns4.p04.nsone.net [zone]
;    198.51.45.68                            ok                        1601003468  7.6 ms
;    2a00:edc0:6259:7:4::4                   ok                        1601003468  14 ms
;  ns01.everbridgedns.net [parent+zone]
;    148.163.205.1                           ok                        1601003468  92 ms
;    2607:f740:e623::1                       ok                        1601003468  14 ms
;  ns02.everbridgedns.net [parent+zone]
;    148.163.205.65                          ok                        1601003468  92 ms
;    2607:f740:e623:4::1                     ok                        1601003468  14 ms
;  ns03.everbridgedns.net [parent+zone]
;    148.163.205.129                         ok                        1601003468  91 ms
;    2607:f740:e623:8::1                     ok                        1601003468  14 ms
;  ns04.everbridgedns.net [parent+zone]
;    148.163.205.193                         ok                        1601003468  92 ms
;    2607:f740:e623:c::1                     ok                        1601003468  14 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.p04.nsone.net (nameserver)
;    198.51.44.4                             PTR dns1.p04.nsone.net (confirmed)
;    2620:4d:4000:6259:7:4:0:1               PTR dns1.p04.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.p04.nsone.net (nameserver)
;    198.51.45.4                             PTR dns2.p04.nsone.net (confirmed)
;    2a00:edc0:6259:7:4::2                   PTR dns2.p04.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.p04.nsone.net (nameserver)
;    198.51.44.68                            PTR dns3.p04.nsone.net (confirmed)
;    2620:4d:4000:6259:7:4:0:3               PTR dns3.p04.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.p04.nsone.net (nameserver)
;    198.51.45.68                            PTR dns4.p04.nsone.net (confirmed)
;    2a00:edc0:6259:7:4::4                   PTR dns4.p04.nsone.net (confirmed)
;  ns01.everbridgedns.net (nameserver; PTR target)
;    148.163.205.1                           PTR ns01.everbridgedns.net (confirmed)
;    2607:f740:e623::1                       PTR none
;  ns02.everbridgedns.net (nameserver)
;    148.163.205.65                          PTR ns02.everbridgedns.net (confirmed)
;    2607:f740:e623:4::1                     PTR none
;  ns03.everbridgedns.net (nameserver)
;    148.163.205.129                         PTR ns03.everbridgedns.net (confirmed)
;    2607:f740:e623:8::1                     PTR none
;  ns04.everbridgedns.net (nameserver)
;    148.163.205.193                         PTR ns04.everbridgedns.net (confirmed)
;    2607:f740:e623:c::1                     PTR none

;; PUBLIC RESOLVERS
;  Cloudflare PTR   ns01.everbridgedns.net.  ttl 3600
;  Google     PTR   ns01.everbridgedns.net.  ttl 3600
;  Quad9      PTR   ns01.everbridgedns.net.  ttl 3600
;  OpenDNS    PTR   ns01.everbridgedns.net.  ttl 3600