ASN AS23661 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS23661?

AS23661 is listed under CLARA, Inc..

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

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AS23661 CLARA, Inc. | IPGeolocation.io

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AS Data

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Raw Whois

Parsed Whois

Peers

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Legacy Routes

CLARA, Inc. clara.co.jp

JP 13 Routes

AS Data

AS23661

AS23661 – CLARA, Inc.

AS Number	23661
AS Name	CLARA, Inc.
Organization	CLARA, Inc. (org-coi1-ap)
Country	JP
Website	clara.co.jp
Number of IPv4 Routes	12
Number of IPv6 Routes	1
ASN type	HOSTING
Registry	APNIC
Date Allocated	2003-03-04

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
182.54.176.0/20	AS23661	CLARA, Inc.	LifeSience	4096
42.123.32.0/22	AS23661	CLARA, Inc.	CLARA, Inc.	1024
119.18.216.0/21	AS23661	CLARA, Inc.	CLARA, Inc.	2048
182.50.104.0/21	AS23661	CLARA, Inc.	CLARA, Inc.	2048
182.50.96.0/21	AS23661	CLARA, Inc.	CLARA, Inc.	2048
202.3.140.0/22	AS23661	CLARA, Inc.	CLARA, Inc.	1024
116.197.136.0/21	AS23661	CLARA, Inc.	Server farm	2048
198.180.142.0/24	AS23661	CLARA, Inc.	CLARA, Inc.	256
2406:800::/32	AS23661	CLARA, Inc.	CLARA, Inc.	~79×10²⁷
202.45.160.0/21	AS23661	CLARA, Inc.	CLARA, Inc.	2048
202.51.8.0/21	AS23661	CLARA, Inc.	Midokura	2048
110.50.240.0/20	AS23661	CLARA, Inc.	management	4096
124.108.32.0/21	AS23661	CLARA, Inc.	CLARA ONLINE	2048

Raw Whois Response

[ JPNIC database provides information regarding IP address and ASN. Its use   ]
[ is restricted to network administration purposes. For further information,  ]
[ use 'whois -h whois.nic.ad.jp help'. To only display English output,        ]
[ add '/e' at the end of command, e.g. 'whois -h whois.nic.ad.jp xxx/e'.      ]

No match!!

Reference: WHOIS servers of RIRs
  APNIC WHOIS(whois.apnic.net)
  ARIN WHOIS(whois.arin.net)
  RIPE WHOIS(apps.db.ripe.net)
  LACNIC WHOIS(whois.lacnic.net)
  AfriNIC WHOIS(whois.afrinic.net)

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS23552 - AS24575'

as-block:       AS23552 - AS24575
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
remarks:        AS23889 has been transfered to AfriNIC
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2009-09-29T06:04:16Z
source:         APNIC

role:           APNIC Hostmaster
address:        PO Box 3646
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2026-08-26T00:40:00Z
source:         APNIC

% Information related to 'AS23644 - AS23690'

as-block:       AS23644 - AS23690
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:  2008-09-04T06:40:26Z
source:         APNIC

role:           APNIC Hostmaster
address:        PO Box 3646
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2026-08-26T00:40:00Z
source:         APNIC

% Information related to 'AS23661'

% Abuse contact for 'AS23661' is 'abuse@clara.ad.jp'

aut-num:        AS23661
as-name:        CLARA-AS-AP
descr:          CLARA, Inc.
descr:          Web Hosting Provider
descr:          Tokyo, Japan
country:        JP
import:         from AS2518 action pref=100; accept ANY
import:         from AS17941 action pref=100; accept ANY
import:         from AS9505 action pref=100; accept ANY
export:         to AS2518 announce AS23661
export:         to AS17941 announce AS23661
export:         to AS9505 announce AS23661
remarks:        Send spam/abuse reports to abuse@clara.ad.jp
org:            ORG-COI1-AP
admin-c:        CNO11-AP
tech-c:         CNO11-AP
abuse-c:        AC1717-AP
notify:         as23661@clara.ad.jp
mnt-lower:      MAINT-JP-CLARA
mnt-routes:     MAINT-JP-CLARA
mnt-by:         APNIC-HM
mnt-irt:        IRT-CLARA-JP
last-modified:  2024-05-22T02:12:42Z
source:         APNIC

irt:            IRT-CLARA-JP
address:        4F, ACN Tamachi Building
address:        4-5-10, Shiba
address:        Minato-ku, Tokyo, 108-0014
address:        Japan
e-mail:         abuse@clara.ad.jp
abuse-mailbox:  abuse@clara.ad.jp
admin-c:        CNO11-AP
tech-c:         CNO11-AP
auth:           # Filtered
remarks:        abuse@clara.ad.jp was validated on 2026-04-07
mnt-by:         MAINT-JP-CLARA
last-modified:  2026-04-07T21:47:44Z
source:         APNIC

organisation:   ORG-COI1-AP
org-name:       CLARA, Inc.
org-type:       LIR
country:        JP
address:        4F, ACN Tamachi Building
address:        4-5-10, Shiba
phone:          +81-3-4213-0777
fax-no:         +81-3-6453-7552
e-mail:         info@clara.co.jp
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2025-03-26T12:57:32Z
source:         APNIC

role:           ABUSE CLARAJP
country:        ZZ
address:        4F, ACN Tamachi Building
address:        4-5-10, Shiba
address:        Minato-ku, Tokyo, 108-0014
address:        Japan
phone:          +000000000
e-mail:         abuse@clara.ad.jp
admin-c:        CNO11-AP
tech-c:         CNO11-AP
nic-hdl:        AC1717-AP
remarks:        Generated from irt object IRT-CLARA-JP
remarks:        abuse@clara.ad.jp was validated on 2026-04-07
abuse-mailbox:  abuse@clara.ad.jp
mnt-by:         APNIC-ABUSE
last-modified:  2026-04-07T21:48:07Z
source:         APNIC

person:         Clara Network Operations
address:        4F, ACN Tamachi Building
address:        4-5-10, Shiba
address:        Minato-ku, Tokyo, 108-0014
country:        JP
phone:          +81-3-4213-0778
fax-no:         +81-3-6453-7552
e-mail:         as23661@clara.ad.jp
nic-hdl:        CNO11-AP
mnt-by:         MAINT-JP-CLARA
last-modified:  2025-03-26T00:18:25Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-US2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS23552 - AS24575",
    "description" : [ "APNIC ASN block" ],
    "admin_contacts" : [ "HM20-AP" ],
    "tech_contacts" : [ "HM20-AP" ],
    "remarks" : [ "These AS numbers are further assigned by APNIC", "to APNIC members and end-users in the APNIC region", "AS23889 has been transfered to AfriNIC" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2009-09-29",
    "source" : "APNIC"
  }, {
    "as_block" : "AS23644 - AS23690",
    "description" : [ "APNIC ASN block" ],
    "admin_contacts" : [ "HM20-AP" ],
    "tech_contacts" : [ "HM20-AP" ],
    "remarks" : [ "These AS numbers are further assigned by APNIC", "to APNIC members and end-users in the APNIC region" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2008-09-04",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS23661",
    "as_name" : "CLARA-AS-AP",
    "description" : [ "CLARA, Inc.", "Web Hosting Provider", "Tokyo, Japan" ],
    "country" : "JP",
    "import" : [ "from AS2518 action pref=100; accept ANY", "from AS17941 action pref=100; accept ANY", "from AS9505 action pref=100; accept ANY" ],
    "export" : [ "to AS2518 announce AS23661", "to AS17941 announce AS23661", "to AS9505 announce AS23661" ],
    "organization" : "ORG-COI1-AP",
    "admin_contacts" : [ "CNO11-AP" ],
    "tech_contacts" : [ "CNO11-AP" ],
    "abuse_contacts" : [ "AC1717-AP" ],
    "remarks" : [ "Send spam/abuse reports to abuse@clara.ad.jp" ],
    "notify" : [ "as23661@clara.ad.jp" ],
    "mnt_irt" : [ "IRT-CLARA-JP" ],
    "mnt_lower" : [ "MAINT-JP-CLARA" ],
    "mnt_routes" : [ "MAINT-JP-CLARA" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2024-05-22",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-CLARA-JP",
    "address" : [ "4F, ACN Tamachi Building", "4-5-10, Shiba", "Minato-ku, Tokyo, 108-0014", "Japan" ],
    "street" : "Shiba",
    "city" : "Tokyo",
    "zip_code" : "108-0014",
    "country" : "JAPAN",
    "email" : [ "abuse@clara.ad.jp" ],
    "abuse_mailbox" : [ "abuse@clara.ad.jp" ],
    "admin_contacts" : [ "CNO11-AP" ],
    "tech_contacts" : [ "CNO11-AP" ],
    "remarks" : [ "abuse@clara.ad.jp was validated on 2026-04-07" ],
    "mnt_by" : [ "MAINT-JP-CLARA" ],
    "date_updated" : "2026-04-07",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-COI1-AP",
    "name" : "CLARA, Inc.",
    "type" : "LIR",
    "address" : [ "4F, ACN Tamachi Building", "4-5-10, Shiba" ],
    "street" : "Shiba",
    "country" : [ "JP" ],
    "email" : [ "info@clara.co.jp" ],
    "phone" : [ "+81-3-4213-0777" ],
    "fax_no" : [ "+81-3-6453-7552" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2025-03-26",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "CNO11-AP",
    "name" : "Clara Network Operations",
    "address" : [ "4F, ACN Tamachi Building", "4-5-10, Shiba", "Minato-ku, Tokyo, 108-0014" ],
    "street" : "Shiba",
    "city" : "Tokyo",
    "zip_code" : "108-0014",
    "country" : "JP",
    "email" : [ "as23661@clara.ad.jp" ],
    "phone" : [ "+81-3-4213-0778" ],
    "fax_no" : [ "+81-3-6453-7552" ],
    "mnt_by" : [ "MAINT-JP-CLARA" ],
    "date_updated" : "2025-03-26",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "CNO11-AP",
    "name" : "Clara Network Operations",
    "address" : [ "4F, ACN Tamachi Building", "4-5-10, Shiba", "Minato-ku, Tokyo, 108-0014" ],
    "street" : "Shiba",
    "city" : "Tokyo",
    "zip_code" : "108-0014",
    "country" : "JP",
    "email" : [ "as23661@clara.ad.jp" ],
    "phone" : [ "+81-3-4213-0778" ],
    "fax_no" : [ "+81-3-6453-7552" ],
    "mnt_by" : [ "MAINT-JP-CLARA" ],
    "date_updated" : "2025-03-26",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AC1717-AP",
    "name" : "ABUSE CLARAJP",
    "address" : [ "4F, ACN Tamachi Building", "4-5-10, Shiba", "Minato-ku, Tokyo, 108-0014", "Japan" ],
    "street" : "Shiba",
    "city" : "Tokyo",
    "zip_code" : "108-0014",
    "country" : "ZZ",
    "email" : [ "abuse@clara.ad.jp" ],
    "abuse_mailbox" : [ "abuse@clara.ad.jp" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "CNO11-AP" ],
    "tech_contacts" : [ "CNO11-AP" ],
    "remarks" : [ "Generated from irt object IRT-CLARA-JP", "abuse@clara.ad.jp was validated on 2026-04-07" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-04-07",
    "source" : "APNIC",
    "addressCountry" : "JAPAN"
  } ]
}

Peers

AS Number	Description	Country
AS24482	SG.GS	SG
AS55900	GLBB Japan KK	JP
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS58453	China Mobile International Limited	HK
AS59105	Home NOC Operators Group	JP
AS9505	Chunghwa Telecom Co., Ltd.	TW
AS6939	Hurricane Electric LLC	US
AS8849	Melbikomas UAB	LT
AS17941	Equinix Japan Enterprise K.K.	JP
AS4777	APNIC COLO Asia Pacific Network Information Centre	AU
AS140627	ONEQODE ASSETS PTY LTD	AU
AS137367	PT iForte Solusi Infotek	ID
AS4775	Globe Telecom GMCR,INC	PH
AS35280	F5 Networks SARL	FR
AS36236	NetActuate, Inc	US
AS131948	FORNEXT Inc.	JP
AS45701	PT Internet Madju Abad Milenindo	ID
AS1828	Unitas Global	US
AS2518	BIGLOBE Inc.	JP
AS2515	Japan Network Information Center	JP
AS4637	Telstra International Limited	HK
AS38001	NewMedia Express Pte Ltd	SG
AS137409	GSL Networks Pty LTD	AU
AS49544	i3D.net B.V	NL

Upstreams

AS Number	Description	Country
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS131948	FORNEXT Inc.	JP
AS6939	Hurricane Electric LLC	US
AS2518	BIGLOBE Inc.	JP
AS4637	Telstra International Limited	HK

ASN Lookup Tool

ASN Summary

AS23661 – CLARA, Inc.

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IP Ranges

Raw Whois Response

Parsed Whois Response

Peers

Upstreams

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