ASN AS24572 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS24572?

AS24572 is listed under Yahoo Japan.

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.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS24572 Yahoo Japan | IPGeolocation.io

ASN Lookup Tool

Yahoo Japan yahoo.co.jp

JP 5 Routes

AS Data

AS24572

AS24572 – Yahoo Japan

AS Number	24572
AS Name	Yahoo Japan
Organization	Yahoo Japan (org-yj1-ap)
Country	JP
Website	yahoo.co.jp
Number of IPv4 Routes	4
Number of IPv6 Routes	1
ASN type	BUSINESS
Registry	APNIC
Date Allocated	2006-02-27

ASN Intelligence API for production workflows

Use ASN data for AS24572 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
183.79.0.0/16	AS24572	Yahoo Japan	Yahoo Japan	65536
114.111.64.0/18	AS24572	Yahoo Japan	Yahoo Japan	16384
114.110.48.0/20	AS24572	Yahoo Japan	Yahoo Japan	4096
124.83.128.0/17	AS24572	Yahoo Japan	Yahoo Japan	32768
2400:7e00::/32	AS24572	Yahoo Japan	Yahoo Japan	~79×10²⁷

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 'AS24538 - AS24575'

as-block:       AS24538 - 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
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 'AS24572'

% Abuse contact for 'AS24572' is 'ml-nwunit-bbnw@lycorp.co.jp'

aut-num:        AS24572
as-name:        YAHOO-JP-AS-AP
descr:          Yahoo Japan
country:        JP
import:         from AS17676 action pref=200; accept ANY
import:         from AS2497 action pref=200; accept ANY
export:         to AS17676 announce AS24572
export:         to AS2497 announce AS24572
org:            ORG-YJ1-AP
admin-c:        YJ982-AP
tech-c:         YJ982-AP
abuse-c:        AY448-AP
mnt-lower:      MAINT-AP-YAHOO-JP
mnt-routes:     MAINT-AP-YAHOO-JP
mnt-by:         APNIC-HM
mnt-irt:        IRT-YAHOO-JP
last-modified:  2021-05-18T21:44:59Z
source:         APNIC

irt:            IRT-YAHOO-JP
address:        Kioi Tower, Tokyo Garden Terrace Kioicho, 1-3 Kioicho, Chiyoda-ku, Tokyo, 1028282 Japan
e-mail:         ml-nwunit-bbnw@lycorp.co.jp
abuse-mailbox:  ml-nwunit-bbnw@lycorp.co.jp
admin-c:        yj982-ap
tech-c:         yj982-ap
auth:           # Filtered
remarks:        ml-nwunit-bbnw@lycorp.co.jp was validated on 2026-06-23
mnt-by:         MAINT-AP-YAHOO-JP
last-modified:  2026-06-23T00:00:38Z
source:         APNIC

organisation:   ORG-YJ1-AP
org-name:       Yahoo Japan
org-type:       LIR
country:        JP
address:        Kioi Tower, Tokyo Garden Terrace Kioicho
address:        1-3 Kioicho
phone:          +81-3-6898-6280
e-mail:         ml-nwunit-bbnw@lycorp.co.jp
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2026-04-02T12:59:26Z
source:         APNIC

role:           ABUSE YAHOOJP
country:        ZZ
address:        Kioi Tower, Tokyo Garden Terrace Kioicho, 1-3 Kioicho, Chiyoda-ku, Tokyo, 1028282 Japan
phone:          +000000000
e-mail:         ml-nwunit-bbnw@lycorp.co.jp
admin-c:        yj982-ap
tech-c:         yj982-ap
nic-hdl:        AY448-AP
remarks:        Generated from irt object IRT-YAHOO-JP
remarks:        ml-nwunit-bbnw@lycorp.co.jp was validated on 2026-06-23
abuse-mailbox:  ml-nwunit-bbnw@lycorp.co.jp
mnt-by:         APNIC-ABUSE
last-modified:  2026-06-27T02:40:20Z
source:         APNIC

role:           YAHOO JAPAN
nic-hdl:        YJ982-AP
e-mail:         route-admin@mail.yahoo.co.jp
notify:         route-admin@mail.yahoo.co.jp
address:        Kioi Tower, Tokyo Garden Terrace Kioicho, 1-3 Kioicho, Chiyoda-ku, Tokyo, 1028282
phone:          +81-3-6898-6280
country:        JP
admin-c:        NM982-AP
tech-c:         NM982-AP
mnt-by:         MAINT-AP-YAHOO-JP
last-modified:  2018-12-10T03:48:18Z
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" : "AS24538 - 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" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2008-09-04",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS24572",
    "as_name" : "YAHOO-JP-AS-AP",
    "description" : [ "Yahoo Japan" ],
    "country" : "JP",
    "import" : [ "from AS17676 action pref=200; accept ANY", "from AS2497 action pref=200; accept ANY" ],
    "export" : [ "to AS17676 announce AS24572", "to AS2497 announce AS24572" ],
    "organization" : "ORG-YJ1-AP",
    "admin_contacts" : [ "YJ982-AP" ],
    "tech_contacts" : [ "YJ982-AP" ],
    "abuse_contacts" : [ "AY448-AP" ],
    "mnt_irt" : [ "IRT-YAHOO-JP" ],
    "mnt_lower" : [ "MAINT-AP-YAHOO-JP" ],
    "mnt_routes" : [ "MAINT-AP-YAHOO-JP" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2021-05-18",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-YAHOO-JP",
    "address" : [ "Kioi Tower, Tokyo Garden Terrace Kioicho, 1-3 Kioicho, Chiyoda-ku, Tokyo, 1028282 Japan" ],
    "city" : "Chiyoda-ku",
    "state" : "TOKYO",
    "zip_code" : "1028282",
    "country" : "JAPAN",
    "email" : [ "ml-nwunit-bbnw@lycorp.co.jp" ],
    "abuse_mailbox" : [ "ml-nwunit-bbnw@lycorp.co.jp" ],
    "admin_contacts" : [ "yj982-ap" ],
    "tech_contacts" : [ "yj982-ap" ],
    "remarks" : [ "ml-nwunit-bbnw@lycorp.co.jp was validated on 2026-06-23" ],
    "mnt_by" : [ "MAINT-AP-YAHOO-JP" ],
    "date_updated" : "2026-06-23",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-YJ1-AP",
    "name" : "Yahoo Japan",
    "type" : "LIR",
    "address" : [ "Kioi Tower, Tokyo Garden Terrace Kioicho", "1-3 Kioicho" ],
    "country" : [ "JP" ],
    "email" : [ "ml-nwunit-bbnw@lycorp.co.jp" ],
    "phone" : [ "+81-3-6898-6280" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2026-04-02",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "YJ982-AP",
    "name" : "YAHOO JAPAN",
    "address" : [ "Kioi Tower, Tokyo Garden Terrace Kioicho, 1-3 Kioicho, Chiyoda-ku, Tokyo, 1028282" ],
    "street" : "Kioicho Chiyoda-ku Tokyo",
    "country" : "JP",
    "email" : [ "route-admin@mail.yahoo.co.jp" ],
    "phone" : [ "+81-3-6898-6280" ],
    "admin_contacts" : [ "NM982-AP" ],
    "tech_contacts" : [ "NM982-AP" ],
    "notify" : [ "route-admin@mail.yahoo.co.jp" ],
    "mnt_by" : [ "MAINT-AP-YAHOO-JP" ],
    "date_updated" : "2018-12-10",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "YJ982-AP",
    "name" : "YAHOO JAPAN",
    "address" : [ "Kioi Tower, Tokyo Garden Terrace Kioicho, 1-3 Kioicho, Chiyoda-ku, Tokyo, 1028282" ],
    "street" : "Kioicho Chiyoda-ku Tokyo",
    "country" : "JP",
    "email" : [ "route-admin@mail.yahoo.co.jp" ],
    "phone" : [ "+81-3-6898-6280" ],
    "admin_contacts" : [ "NM982-AP" ],
    "tech_contacts" : [ "NM982-AP" ],
    "notify" : [ "route-admin@mail.yahoo.co.jp" ],
    "mnt_by" : [ "MAINT-AP-YAHOO-JP" ],
    "date_updated" : "2018-12-10",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AY448-AP",
    "name" : "ABUSE YAHOOJP",
    "address" : [ "Kioi Tower, Tokyo Garden Terrace Kioicho, 1-3 Kioicho, Chiyoda-ku, Tokyo, 1028282 Japan" ],
    "city" : "Chiyoda-ku",
    "state" : "TOKYO",
    "zip_code" : "1028282",
    "country" : "ZZ",
    "email" : [ "ml-nwunit-bbnw@lycorp.co.jp" ],
    "abuse_mailbox" : [ "ml-nwunit-bbnw@lycorp.co.jp" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "yj982-ap" ],
    "tech_contacts" : [ "yj982-ap" ],
    "remarks" : [ "Generated from irt object IRT-YAHOO-JP", "ml-nwunit-bbnw@lycorp.co.jp was validated on 2026-06-23" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-06-27",
    "source" : "APNIC",
    "addressCountry" : "JAPAN"
  } ]
}

Peers

AS Number	Description	Country
AS55900	GLBB Japan KK	JP
AS2497	Internet Initiative Japan Inc.	JP
AS59105	Home NOC Operators Group	JP
AS2516	KDDI CORPORATION	ZZ
AS8220	COLT Technology Services Group Limited	GB
AS35280	F5 Networks SARL	FR
AS4713	NTT DOCOMO BUSINESS,Inc.	JP
AS17676	SoftBank Corp.	JP
AS6939	Hurricane Electric LLC	US
AS24296	LY Corporation	JP
AS2518	BIGLOBE Inc.	JP
AS150369	TelHi Corporation	JP

Upstreams

AS Number	Description	Country
AS2497	Internet Initiative Japan Inc.	JP
AS2516	KDDI CORPORATION	ZZ
AS8220	COLT Technology Services Group Limited	GB
AS4713	NTT DOCOMO BUSINESS,Inc.	JP
AS17676	SoftBank Corp.	JP
AS6939	Hurricane Electric LLC	US

Downstreams

AS Number	Description	Country
AS24296	LY Corporation	JP