18272 BC-NET Benesse Corporation, JP
Adjacency: 2 Upstream: 2 Downstream: 0
Upstream Adjacent AS list
AS2497 IIJ Internet Initiative Japan Inc., JP
AS7670 CTNET Enecom,Inc., JP
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 16740 AS18272 ORIGIN Originate: 4096 /20.00 Transit: 0 /0.00 BC-NET Benesse Corporation, 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 % 6252 AS18272 BC-NET Benesse Corporation, JP 11 7 0 4 7 63.64% Prefix AS Path Aggregation Suggestion 182.16.236.0/22 4777 2497 18272 182.16.236.0/24 4777 2497 7670 18272 182.16.237.0/24 4777 2497 18272 - Withdrawn - matching aggregate 182.16.236.0/22 4777 2497 18272 182.16.238.0/24 4777 2497 18272 - Withdrawn - matching aggregate 182.16.236.0/22 4777 2497 18272 182.16.239.0/24 4777 2497 18272 - Withdrawn - matching aggregate 182.16.236.0/22 4777 2497 18272 202.8.6.0/23 4777 2497 18272 202.8.6.0/24 4777 2497 18272 - Withdrawn - matching aggregate 202.8.6.0/23 4777 2497 18272 202.8.7.0/24 4777 2497 18272 - Withdrawn - matching aggregate 202.8.6.0/23 4777 2497 18272 202.143.2.0/23 4777 2497 18272 202.143.2.0/24 4777 2497 18272 - Withdrawn - matching aggregate 202.143.2.0/23 4777 2497 18272 202.143.3.0/24 4777 2497 18272 - Withdrawn - matching aggregate 202.143.2.0/23 4777 2497 18272
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS18272 8 More Specifics 11 Total Advertisements BC-NET Benesse Corporation, JP
182.16.236.0/24 182.16.236.0/22
182.16.237.0/24 182.16.236.0/22
182.16.238.0/24 182.16.236.0/22
182.16.239.0/24 182.16.236.0/22
202.8.6.0/24 202.8.6.0/23
202.8.7.0/24 202.8.6.0/23
202.143.2.0/24 202.143.2.0/23
202.143.3.0/24 202.143.2.0/23
whois: 402332
IANA has recorded AS18272 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS18272\n % [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to 'AS17653 - AS18431'
as-block: AS17653 - AS18431
descr: APNIC ASN block
remarks: These AS numbers are further assigned by APNIC
remarks: to APNIC members and end-users in the APNIC region
admin-c: HM20-AP
tech-c: HM20-AP
mnt-by: APNIC-HM
mnt-lower: APNIC-HM
last-modified: 2019-01-08T23:19:07Z
source: APNIC
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address: South Brisbane
address: QLD 4101
country: AU
phone: +61 7 3858 3100
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e-mail: helpdesk@apnic.net
admin-c: AMS11-AP
tech-c: AH256-AP
nic-hdl: HM20-AP
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notify: hostmaster@apnic.net
mnt-by: MAINT-APNIC-AP
last-modified: 2013-10-23T04:06:51Z
source: APNIC
% Information related to 'AS18259 - AS18288'
as-block: AS18259 - AS18288
descr: JPNIC-2Byte-ASBLOCK-AP
descr: for assignment to JPNIC members
country: JP
admin-c: JNIC1-AP
tech-c: JNIC1-AP
remarks: Authoritative information regarding AS Number
remarks: assignments made from within this block can be
remarks: queried at whois.nic.ad.jp.
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remarks: add '/e' at the end of command,
remarks: e.g. 'whois -h whois.nic.ad.jp xxx/e'.
mnt-by: APNIC-HM
mnt-lower: MAINT-JPNIC
last-modified: 2023-08-03T05:07:53Z
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
fax-no: +81-3-5297-2312
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 'AS18272'
% Abuse contact for 'AS18272' is 'hostmaster@nic.ad.jp'
aut-num: AS18272
as-name: BSH-NET
descr: Benesse Corporation
descr: 10-1 Takayanagi-Higashimachi Kita-ku,Okayama City,Okayama,700-034,Japan
admin-c: JNIC1-AP
tech-c: JNIC1-AP
remarks: Email address for spam or abuse complaints : bc-nw@mail.benesse.co.jp
country: JP
mnt-by: MAINT-JPNIC
mnt-irt: IRT-JPNIC-JP
last-modified: 2024-08-16T02:49:35Z
source: APNIC
irt: IRT-JPNIC-JP
address: Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address: Chiyoda-ku, Tokyo 101-0047, japan
e-mail: hostmaster@nic.ad.jp
abuse-mailbox: hostmaster@nic.ad.jp
phone: +81-3-5297-2311
fax-no: +81-3-5297-2312
admin-c: JNIC1-AP
tech-c: JNIC1-AP
auth: # Filtered
remarks: hostmaster@nic.ad.jp was validated on 2024-11-27
mnt-by: MAINT-JPNIC
last-modified: 2025-09-04T01:00:00Z
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
fax-no: +81-3-5297-2312
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 'AS18272'
aut-num: AS18272
as-name: BC-NET
descr: Benesse Corporation
import: from AS7670 100 accept ANY
import: from AS2497 100 accept ANY
export: to AS7670 announce AS18272
export: to AS2497 announce AS18272
country: JP
admin-c: MH10774JP
tech-c: JP00117856
last-modified: 2023-07-26T02:24:46Z
remarks: This information has been partially mirrored by APNIC from
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remarks: JPNIC WHOIS Gateway at
remarks: http://www.nic.ad.jp/en/db/whois/en-gateway.html or
remarks: whois.nic.ad.jp for WHOIS client. (The WHOIS client
remarks: defaults to Japanese output, use the /e switch for English
remarks: output)
source: JPNIC
% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-AU5)