Website

Answer
The name has no address

DNS records

81.in-addr.arpa

NS
TTL 1 day
SOA
TTL 1 hour
CAA
None: any certificate authority may issue for this name

As rirns.arin.net answers them

Reputation

Domain blocklists

  • Spamhaus DBL Not listed
  • SURBL Not listed
  • URIBL Not listed

Rankings

119,903 Tranco rank down from 111,972 on 2026-09-21
Not rankedOpen PageRank

From Tranco and Open PageRank

WHOIS

% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object

domain:       81.in-addr.arpa

organisation: RIPE NCC

nserver:      ns3.afrinic.net.
nserver:      ns3.lacnic.net.
nserver:      ns4.apnic.net.
nserver:      pri.authdns.ripe.net.
nserver:      rirns.arin.net.
ds-rdata:     57427 13 2 a6631edef599cbd0396a973f158b00334a9fec4e3b097bbca607552fcca19b0a

whois:        whois.ripe.net

changed:      2001-04
changed:      2026-03-17
source:       IANA

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

%ERROR:101: no entries found
%
% No entries found in source RIPE.

% This query was served by the RIPE Database Query Service version 1.124.1 (BUSA)

DNSSEC

Every link from the root to 81.in-addr.arpa verifies.

. Verified

  • Found 3 DNSKEY records for .
  • DS=20326/SHA-256 verifies DNSKEY=20326/SEP
  • DS=38696/SHA-256 verifies DNSKEY=38696/SEP
  • Found 1 RRSIGs over DNSKEY RRset
  • RRSIG=38696 and DNSKEY=38696/SEP verifies the DNSKEY RRset

arpa Verified

  • Found 1 DS records for arpa in the . zone
  • DS=42581/SHA-256 has algorithm RSASHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=8763 and DNSKEY=8763 verifies the DS RRset
  • Found 2 DNSKEY records for arpa
  • DS=42581/SHA-256 verifies DNSKEY=42581/SEP
  • Found 1 RRSIGs over DNSKEY RRset
  • RRSIG=42581 and DNSKEY=42581/SEP verifies the DNSKEY RRset

in-addr.arpa Verified

  • Found 4 DS records for in-addr.arpa in the arpa zone
  • DS=53696/SHA-256 has algorithm RSASHA256
  • DS=63982/SHA-256 has algorithm RSASHA256
  • DS=47054/SHA-256 has algorithm RSASHA256
  • DS=54956/SHA-256 has algorithm RSASHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=14568 and DNSKEY=14568 verifies the DS RRset
  • Found 3 DNSKEY records for in-addr.arpa
  • DS=53696/SHA-256 matches no DNSKEY
  • DS=63982/SHA-256 matches no DNSKEY
  • DS=47054/SHA-256 verifies DNSKEY=47054/SEP
  • DS=54956/SHA-256 verifies DNSKEY=54956/SEP
  • Found 2 RRSIGs over DNSKEY RRset
  • RRSIG=47054 and DNSKEY=47054/SEP verifies the DNSKEY RRset
  • RRSIG=54956 and DNSKEY=54956/SEP verifies the DNSKEY RRset

81.in-addr.arpa Verified

  • Found 1 DS records for 81.in-addr.arpa in the in-addr.arpa zone
  • DS=57427/SHA-256 has algorithm ECDSAP256SHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=60126 and DNSKEY=60126 verifies the DS RRset
  • Found 1 DNSKEY records for 81.in-addr.arpa
  • DS=57427/SHA-256 verifies DNSKEY=57427/SEP
  • Found 1 RRSIGs over DNSKEY RRset
  • RRSIG=57427 and DNSKEY=57427/SEP verifies the DNSKEY RRset
  • Found 1 RRSIGs over SOA RRset
  • RRSIG=57427 and DNSKEY=57427/SEP verifies the SOA RRset