This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
whois: 402332
IANA has recorded AS15821 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS15821\n % 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.
% Information related to 'AS15805 - AS15824'
as-block: AS15805 - AS15824
descr: RIPE NCC ASN block
remarks: These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by: RIPE-NCC-HM-MNT
created: 2018-11-22T15:27:25Z
last-modified: 2018-11-22T15:27:25Z
source: RIPE
% Information related to 'AS15821'
% Abuse contact for 'AS15821' is 'nocalliance64@gmail.com'
aut-num: AS15821
as-name: Avtobudplyus-AS
org: ORG-JUVA1-RIPE
remarks: -----------------------
remarks: AS15821 UPLINKS
remarks: -----------------------
import: from AS12963 accept ANY
import: from AS12883 accept ANY
import: from AS3252 accept ANY
remarks: -----------------------
remarks: AS15821 UPLINKS
remarks: -----------------------
export: to AS12963 announce { 193.41.5.0/24, 193.41.4.0/24, 193.41.4.0/23 }
export: to AS12883 announce { 193.41.5.0/24, 193.41.4.0/24, 193.41.4.0/23 }
export: to AS3252 announce { 193.41.5.0/24, 193.41.4.0/24, 193.41.4.0/23 }
sponsoring-org: ORG-UEL7-RIPE
admin-c: AN34282-RIPE
tech-c: AN34282-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: Alliance64
created: 2001-11-07T07:17:26Z
last-modified: 2026-04-22T14:47:36Z
source: RIPE
organisation: ORG-JUVA1-RIPE
org-name: Avtobudplyus LLC
country: UA
org-type: OTHER
address: 37 Zhylianska Str., Kiev, Ukraine, 01033
abuse-c: ACRO64340-RIPE
mnt-ref: Alliance64
mnt-by: Alliance64
created: 2011-01-20T14:27:17Z
last-modified: 2026-04-22T14:43:50Z
source: RIPE # Filtered
%ERROR:201: access denied for 2401:2000:6660:0:0:0:0:13
%
% Queries from your IP address have passed the daily limit of controlled objects.
% Access from your host has been temporarily denied.
% For more information, see
% https://docs.db.ripe.net/FAQ/#why-did-i-receive-an-error-201-access-denied
% This query was served by the RIPE Database Query Service version 1.121.2 (DEXTER)