204921 -Reserved AS-, ZZ
Adjacency: 5 Upstream: 4 Downstream: 1
Upstream Adjacent AS list
AS206216 ADVIN-AS, US
AS18423 RAID-AS-TW RAID Networks Co., Ltd., TW
AS6939 HURRICANE, US
AS216211 AS216245, US
Downstream Adjacent AS list
AS208223 FOXO-AS fOxO Internet Service Provider, TW
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 55676 AS204921 ORIGIN Originate: 512 /23.00 Transit: 0 /0.00 -Reserved AS-, ZZ
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 27271 AS204921 -Reserved AS-, ZZ 2 2 1 1 1 50.00% Prefix AS Path Aggregation Suggestion 142.249.114.0/23 6939 204921 + Announce - aggregate of 142.249.114.0/24 (6939 204921) and 142.249.115.0/24 (6939 204921) 142.249.114.0/24 6939 204921 - Withdrawn - aggregated with 142.249.115.0/24 (6939 204921) 142.249.115.0/24 6939 204921 - Withdrawn - aggregated with 142.249.114.0/24 (6939 204921)
whois: 402603
IANA has recorded AS204921 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS204921\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 'AS203940 - AS205662'
as-block: AS203940 - AS205662
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: 2026-03-05T15:29:31Z
last-modified: 2026-03-05T15:29:31Z
source: RIPE
% Information related to 'AS204921'
% Abuse contact for 'AS204921' is 'noc@as204921.net'
aut-num: AS204921
as-name: YunZheng-Network
descr: Yunzheng.Space Research Network
remarks: Geofeed: https://files.yunzheng.space/webdav/geofeed.csv
org: ORG-ZS89-RIPE
remarks: ==================================================
remarks: | UPSTREAMS
remarks: ==================================================
remarks: | RAID NETWORK - TPE
mp-import: afi any.unicast from AS18423 accept ANY
mp-export: afi any.unicast to AS18423 announce AS-YUNZHENG
remarks: | NCSE.TW NETWORK - TPE
mp-import: afi any.unicast from AS204844 accept ANY
mp-export: afi any.unicast to AS204844 announce AS-YUNZHENG
remarks: | IDC Cube - HKG
mp-import: afi any.unicast from AS36530 accept ANY
mp-export: afi any.unicast to AS36530 announce AS-YUNZHENG
remarks: | Sky Digital Co., Ltd. - TPE
mp-import: afi any.unicast from AS134823 accept ANY
mp-export: afi any.unicast to AS134823 announce AS-YUNZHENG
remarks: | MoeDove LLC - TPE
mp-import: afi any.unicast from AS44324 accept ANY
mp-export: afi any.unicast to AS44324 announce AS-YUNZHENG
remarks: ==================================================
remarks: | INTERNET EXCHNAGE POINTS
remarks: ==================================================
remarks: - CXIX | Great Lakes
mp-import: from AS402298 accept ANY
mp-export: to AS402298 announce AS-YUNZHENG
remarks: - STUIX | stuix.io
mp-import: from AS38855 accept ANY
mp-export: to AS38855 announce AS-YUNZHENG
remarks: - TPIX-TW | tpix.net.tw
mp-import: from AS10133 accept ANY
mp-export: to AS10133 announce AS-YUNZHENG
remarks: =================================================
sponsoring-org: ORG-ANL45-RIPE
admin-c: ZS2129-RIPE
tech-c: ZS2129-RIPE
remarks: b222bfa2d373adb3b9314a52c0f4512b
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: ZHNET-MNT
mnt-by: ZYS-MNT
created: 2025-10-10T09:11:08Z
last-modified: 2026-05-29T02:43:28Z
source: RIPE
organisation: ORG-ZS89-RIPE
remarks: ====================================
org-name: zhenyun sun
descr: zhenyun.sun - YunZheng.Space/Network
remarks: ====================================
country: GB
reg-nr: Not Applicable
language: EN
language: ZH
remarks: ====================================
org-type: OTHER
address: Tartu mnt 67/1-13b, Harjuuma
address: 10115
address: Tallinn
address: Estonia
phone: +852-31651702
remarks: ====================================
admin-c: ZS2129-RIPE
tech-c: ZS2129-RIPE
abuse-c: ACRO61962-RIPE
mnt-ref: ZYS-MNT
mnt-by: ZYS-MNT
mnt-ref: JIANYUELAB-STAFF-MNT
created: 2025-10-06T22:27:35Z
last-modified: 2026-05-13T05:35:32Z
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 1.122.1 (BUSA)