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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.

157.53.243.193

193.243.53.157.in-addr.arpa

Zone 243.53.157.in-addr.arpa99 queries in 4.3 s2026-11-09 06:11:21 UTCNot DNSSEC-signed

WHOIS for 157.53.243.193 →TextJSON
  • Problem Resolution of 193.243.53.157.in-addr.arpa stops at 243.53.157.in-addr.arpa: none of its nameservers answered.
  • Problem None of 243.53.157.in-addr.arpa's nameservers gave an authoritative answer, so the zone is effectively offline.
  • Warning dns1.p01.nsone.net (198.51.44.1) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning dns1.p01.nsone.net (2620:4d:4000:6259:7:1:0:1) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning dns2.p01.nsone.net (198.51.45.1) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning dns2.p01.nsone.net (2a00:edc0:6259:7:1::2) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning dns3.p01.nsone.net (198.51.44.65) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning dns3.p01.nsone.net (2620:4d:4000:6259:7:1:0:3) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning dns4.p01.nsone.net (198.51.45.65) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning dns4.p01.nsone.net (2a00:edc0:6259:7:1::4) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning ns01.bridgepayns.com (157.53.243.1) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning ns02.bridgepayns.com (157.53.243.65) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning ns03.bridgepayns.com (157.53.243.129) answers REFUSED for 243.53.157.in-addr.arpa.
  • Warning ns04.bridgepayns.com (157.53.243.193) answers REFUSED for 243.53.157.in-addr.arpa.
  • Note 243.53.157.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

Resolution trace

  1. .asked l.root-servers.net 199.7.83.429.2 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
    • 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
    • e.in-addr-servers.arpa 203.119.86.101 2001:dd8:6::101
    • f.in-addr-servers.arpa 193.0.9.1 2a13:27c0:30::1

    170.247.170.2 failed: NOERROR

  2. in-addr.arpa.asked b.in-addr-servers.arpa 199.253.183.1835.9 ms

    Referral to 157.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. 157.in-addr.arpa.asked y.arin.net 192.82.134.306.0 ms

    Referral to 53.157.in-addr.arpa. unsigned delegation

    • ns2.vrdns.net 209.177.157.6
    • ns4.vrdns.co.uk 176.58.88.95
    • ns3.vrdns.info 208.111.40.6
    • ns1.vrdns.com 104.225.4.101

    No glue for ns2.vrdns.net, ns4.vrdns.co.uk, ns3.vrdns.info, ns1.vrdns.com: addresses looked up via a resolver.

  4. 53.157.in-addr.arpa.asked ns4.vrdns.co.uk 176.58.88.9520 ms

    Referral to 243.53.157.in-addr.arpa. unsigned delegation

    • dns1.p01.nsone.net 198.51.44.1 2620:4d:4000:6259:7:1:0:1
    • ns02.bridgepayns.com 157.53.243.65
    • dns4.p01.nsone.net 198.51.45.65 2a00:edc0:6259:7:1::4
    • ns04.bridgepayns.com 157.53.243.193
    • ns03.bridgepayns.com 157.53.243.129
    • ns01.bridgepayns.com 157.53.243.1
    • dns3.p01.nsone.net 198.51.44.65 2620:4d:4000:6259:7:1:0:3
    • dns2.p01.nsone.net 198.51.45.1 2a00:edc0:6259:7:1::2

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

    208.111.40.6 failed: NOERROR

  5. 243.53.157.in-addr.arpa.

    No nameserver of 243.53.157.in-addr.arpa answered.

    157.53.243.1 failed: REFUSED

    198.51.45.1 failed: REFUSED

    157.53.243.129 failed: REFUSED

    157.53.243.193 failed: REFUSED

    157.53.243.65 failed: REFUSED

    198.51.44.65 failed: REFUSED

Nameservers

Every address of every nameserver, asked for 243.53.157.in-addr.arpa's SOA. "Parent" means the 53.157.in-addr.arpa zone delegates to it; "zone" means 243.53.157.in-addr.arpa lists it itself.

NameserverListed inAddressStatusSerialTime
dns1.p01.nsone.netparent198.51.44.1 glueREFUSED13 ms
2620:4d:4000:6259:7:1:0:1 glueREFUSED13 ms
dns2.p01.nsone.netparent198.51.45.1 glueREFUSED6.0 ms
2a00:edc0:6259:7:1::2 glueREFUSED12 ms
dns3.p01.nsone.netparent198.51.44.65 glueREFUSED14 ms
2620:4d:4000:6259:7:1:0:3 glueREFUSED14 ms
dns4.p01.nsone.netparent198.51.45.65 glueREFUSED6.1 ms
2a00:edc0:6259:7:1::4 glueREFUSED12 ms
ns01.bridgepayns.comparent157.53.243.1 glueREFUSED90 ms
ns02.bridgepayns.comparent157.53.243.65 glueREFUSED90 ms
ns03.bridgepayns.comparent157.53.243.129 glueREFUSED90 ms
ns04.bridgepayns.comparent157.53.243.193 glueREFUSED91 ms

DNSSEC

243.53.157.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 ✓
dns2.p01.nsone.net
nameserver
198.51.45.1dns2.p01.nsone.net ✓
2a00:edc0:6259:7:1::2dns2.p01.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 ✓
dns4.p01.nsone.net
nameserver
198.51.45.65dns4.p01.nsone.net ✓
2a00:edc0:6259:7:1::4dns4.p01.nsone.net ✓
ns01.bridgepayns.com
nameserver
157.53.243.1none
ns02.bridgepayns.com
nameserver
157.53.243.65none
ns03.bridgepayns.com
nameserver
157.53.243.129none
ns04.bridgepayns.com
nameserver
157.53.243.193none

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 1.1.1.1SERVFAIL
Google 8.8.8.8SERVFAIL
Quad9 9.9.9.9timed out
OpenDNS 208.67.222.222SERVFAIL

Text dump

; DNS report for 193.243.53.157.in-addr.arpa (157.53.243.193)
; 2026-11-09 06:11:21 UTC, 99 queries in 4.30 s, zone 243.53.157.in-addr.arpa

;; FINDINGS
;  [ERROR] Resolution of 193.243.53.157.in-addr.arpa stops at 243.53.157.in-addr.arpa: none of its nameservers answered.
;  [ERROR] None of 243.53.157.in-addr.arpa's nameservers gave an authoritative answer, so the zone is effectively offline.
;  [WARN] dns1.p01.nsone.net (198.51.44.1) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] dns1.p01.nsone.net (2620:4d:4000:6259:7:1:0:1) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] dns2.p01.nsone.net (198.51.45.1) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] dns2.p01.nsone.net (2a00:edc0:6259:7:1::2) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] dns3.p01.nsone.net (198.51.44.65) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] dns3.p01.nsone.net (2620:4d:4000:6259:7:1:0:3) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] dns4.p01.nsone.net (198.51.45.65) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] dns4.p01.nsone.net (2a00:edc0:6259:7:1::4) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] ns01.bridgepayns.com (157.53.243.1) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] ns02.bridgepayns.com (157.53.243.65) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] ns03.bridgepayns.com (157.53.243.129) answers REFUSED for 243.53.157.in-addr.arpa.
;  [WARN] ns04.bridgepayns.com (157.53.243.193) answers REFUSED for 243.53.157.in-addr.arpa.
;  [INFO] 243.53.157.in-addr.arpa isn't signed with DNSSEC, so resolvers can't tell forged answers from real ones.

;; TRACE
;  193.243.53.157.in-addr.arpa PTR
;  . @l.root-servers.net (199.7.83.42) 9.2 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	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	e.in-addr-servers.arpa.	; 203.119.86.101 2001:dd8:6::101
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. @b.in-addr-servers.arpa (199.253.183.183) 5.9 ms [NOERROR qr]: referral to 157.in-addr.arpa.
157.in-addr.arpa.		NS	r.arin.net.	; 199.180.180.63 2001:500:f0::63
157.in-addr.arpa.		NS	u.arin.net.	; 204.61.216.50 2001:500:14:6050:ad::1
157.in-addr.arpa.		NS	x.arin.net.	; 199.180.180.63 2001:500:f0::63
157.in-addr.arpa.		NS	y.arin.net.	; 192.82.134.30 2001:500:127::30
157.in-addr.arpa.		NS	z.arin.net.	; 199.180.180.63 2001:500:f0::63
157.in-addr.arpa.		NS	arin.authdns.ripe.net.	; 193.0.9.10 2a13:27c0:30::10
157.in-addr.arpa.	86400	IN	DS	61945 8 2 59A7E48B8B0805465785C72ECC817F325CDF945ED30A04142559E39AD284F01F
;  157.in-addr.arpa. @y.arin.net (192.82.134.30) 6.0 ms [NOERROR qr]: referral to 53.157.in-addr.arpa.
53.157.in-addr.arpa.		NS	ns2.vrdns.net.	; 209.177.157.6
53.157.in-addr.arpa.		NS	ns4.vrdns.co.uk.	; 176.58.88.95
53.157.in-addr.arpa.		NS	ns3.vrdns.info.	; 208.111.40.6
53.157.in-addr.arpa.		NS	ns1.vrdns.com.	; 104.225.4.101
;  53.157.in-addr.arpa. @ns4.vrdns.co.uk (176.58.88.95) 20 ms [NOERROR qr]: referral to 243.53.157.in-addr.arpa.
243.53.157.in-addr.arpa.		NS	dns1.p01.nsone.net.	; 198.51.44.1 2620:4d:4000:6259:7:1:0:1
243.53.157.in-addr.arpa.		NS	ns02.bridgepayns.com.	; 157.53.243.65
243.53.157.in-addr.arpa.		NS	dns4.p01.nsone.net.	; 198.51.45.65 2a00:edc0:6259:7:1::4
243.53.157.in-addr.arpa.		NS	ns04.bridgepayns.com.	; 157.53.243.193
243.53.157.in-addr.arpa.		NS	ns03.bridgepayns.com.	; 157.53.243.129
243.53.157.in-addr.arpa.		NS	ns01.bridgepayns.com.	; 157.53.243.1
243.53.157.in-addr.arpa.		NS	dns3.p01.nsone.net.	; 198.51.44.65 2620:4d:4000:6259:7:1:0:3
243.53.157.in-addr.arpa.		NS	dns2.p01.nsone.net.	; 198.51.45.1 2a00:edc0:6259:7:1::2
;  243.53.157.in-addr.arpa.: failed: No nameserver of 243.53.157.in-addr.arpa answered.

;; NAMESERVERS (SOA asked of each address)
;  dns1.p01.nsone.net [parent]
;    198.51.44.1                             REFUSED                               13 ms
;    2620:4d:4000:6259:7:1:0:1               REFUSED                               13 ms
;  dns2.p01.nsone.net [parent]
;    198.51.45.1                             REFUSED                               6.0 ms
;    2a00:edc0:6259:7:1::2                   REFUSED                               12 ms
;  dns3.p01.nsone.net [parent]
;    198.51.44.65                            REFUSED                               14 ms
;    2620:4d:4000:6259:7:1:0:3               REFUSED                               14 ms
;  dns4.p01.nsone.net [parent]
;    198.51.45.65                            REFUSED                               6.1 ms
;    2a00:edc0:6259:7:1::4                   REFUSED                               12 ms
;  ns01.bridgepayns.com [parent]
;    157.53.243.1                            REFUSED                               90 ms
;  ns02.bridgepayns.com [parent]
;    157.53.243.65                           REFUSED                               90 ms
;  ns03.bridgepayns.com [parent]
;    157.53.243.129                          REFUSED                               90 ms
;  ns04.bridgepayns.com [parent]
;    157.53.243.193                          REFUSED                               91 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)
;  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)
;  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)
;  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)
;  ns01.bridgepayns.com (nameserver)
;    157.53.243.1                            PTR none
;  ns02.bridgepayns.com (nameserver)
;    157.53.243.65                           PTR none
;  ns03.bridgepayns.com (nameserver)
;    157.53.243.129                          PTR none
;  ns04.bridgepayns.com (nameserver)
;    157.53.243.193                          PTR none

;; PUBLIC RESOLVERS
;  Cloudflare PTR   SERVFAIL
;  Google     PTR   SERVFAIL
;  Quad9      PTR   timed out
;  OpenDNS    PTR   SERVFAIL