131941 ENTSU-NET Entsu Co.,Ltd., JP
Adjacency: 2 Upstream: 2 Downstream: 0
Upstream Adjacent AS list
AS23764 CTGNET CTGNet, HK
AS10099 UNICOM-GLOBAL China Unicom Global, HK
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 22674 AS131941 ORIGIN Originate: 2560 /20.68 Transit: 0 /0.00 ENTSU-NET Entsu Co.,Ltd., JP
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 % 13697 AS131941 ENTSU-NET Entsu Co.,Ltd., JP 6 4 1 3 3 50.00% Prefix AS Path Aggregation Suggestion 103.121.44.0/22 4777 10099 131941 103.121.44.0/22 4777 23764 131941 + Announce - aggregate of 103.121.44.0/23 (4777 23764 131941) and 103.121.46.0/23 (4777 23764 131941) 103.121.44.0/23 4777 23764 131941 - Withdrawn - aggregated with 103.121.46.0/23 (4777 23764 131941) 103.121.44.0/24 4777 4713 2914 10099 131941 103.121.45.0/24 4777 23764 131941 - Withdrawn - matching aggregate 103.121.44.0/23 4777 23764 131941 103.121.46.0/24 4777 23764 131941 - Withdrawn - aggregated with 103.121.47.0/24 (4777 23764 131941) 103.121.47.0/24 4777 23764 131941 - Withdrawn - aggregated with 103.121.46.0/24 (4777 23764 131941)
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS131941 5 More Specifics 6 Total Advertisements ENTSU-NET Entsu Co.,Ltd., JP
103.121.44.0/23 103.121.44.0/22
103.121.44.0/24 103.121.44.0/22
103.121.45.0/24 103.121.44.0/22
103.121.46.0/24 103.121.44.0/22
103.121.47.0/24 103.121.44.0/22
whois: 402332
IANA has recorded AS131941 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS131941\n % [whois.apnic.net]
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% Information related to 'AS131072 - AS132095'
as-block: AS131072 - AS132095
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tech-c: HM20-AP
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% Information related to 'AS131905 - AS131992'
as-block: AS131905 - AS131992
descr: JPNIC-4Byte-ASBLOCK-AP
country: JP
admin-c: JNIC1-AP
tech-c: JNIC1-AP
remarks: for assignment to JPNIC members
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mnt-lower: MAINT-JPNIC
last-modified: 2016-01-27T00:24:03Z
source: APNIC
role: Japan Network Information Center
address: Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address: Chiyoda-ku, Tokyo 101-0047, Japan
country: JP
phone: +81-3-5297-2311
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e-mail: hostmaster@nic.ad.jp
admin-c: JI13-AP
tech-c: JE53-AP
nic-hdl: JNIC1-AP
mnt-by: MAINT-JPNIC
last-modified: 2022-01-05T03:04:02Z
source: APNIC
% Information related to 'AS131941'
aut-num: AS131941
as-name: ENTSU-NET
descr: Entsu Co.,Ltd.
import: from AS2914 100 accept ANY
import: from AS4809 100 accept ANY
import: from AS10099 100 accept ANY
export: to AS2914 announce AS131941
export: to AS4809 announce AS131941
export: to AS10099 announce AS131941
country: JP
admin-c: GS5938JP
tech-c: GS5938JP
last-modified: 2018-08-28T03:55:07Z
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source: JPNIC
% Information related to 'AS131072 - AS132095'
as-block: AS131072 - AS132095
descr: APNIC 32-bit ASN block
admin-c: IA55-AP
tech-c: IH123-AP
mnt-by: MNT-APJII-ID
mnt-lower: MNT-APJII-ID
last-modified: 2026-02-25T07:12:54Z
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last-modified: 2026-02-25T04:06:45Z
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role: ID-NIC HOSTMASTERS
address: Indonesian Network Information Center
address: ID-NIC
address: Cyber Building 11th Floor
address: Jakarta 12710
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phone: +62-21-52960634
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