ASN AS23720 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS23720?

AS23720 is listed under Rakuten Mobile, 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.

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.

AS23720 Rakuten Mobile, Inc. | IPGeolocation.io

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AS Data

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Peers

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Legacy Routes

Rakuten Mobile, Inc. mobile.rakuten.co.jp

JP 4 Routes

AS Data

AS23720

AS23720 – Rakuten Mobile, Inc.

AS Number	23720
AS Name	Rakuten Mobile Network, Inc.
Organization	Rakuten Mobile, Inc. (org-rmni1-ap)
Country	JP
Website	mobile.rakuten.co.jp
Number of IPv4 Routes	3
Number of IPv6 Routes	1
ASN type	ISP
Registry	APNIC
Date Allocated	2003-04-16

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Use ASN data for AS23720 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
27.111.76.0/22	AS23720	Rakuten Mobile, Inc.	Rakuten Mobile, Inc.	1024
2403:d000::/32	AS23720	Rakuten Mobile, Inc.	Rakuten Mobile, Inc.	~79×10²⁷
218.251.128.0/17	AS23720	Rakuten Mobile, Inc.	Rakuten Broadband Dynamic Endpoints	32768
203.216.0.0/17	AS23720	Rakuten Mobile, Inc.	Rakuten Mobile, Inc.	32768

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 'AS23701 - AS23772'

as-block:       AS23701 - AS23772
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 'AS23720'

% Abuse contact for 'AS23720' is 'rmi-abuse@mail.rakuten.com'

aut-num:        AS23720
as-name:        RMNI-AS-AP
descr:          Rakuten Mobile Network, Inc.
country:        JP
org:            ORG-RMNI1-AP
admin-c:        RMNI1-AP
tech-c:         RMNI1-AP
abuse-c:        AR792-AP
mnt-lower:      MAINT-RMNI-JP
mnt-routes:     MAINT-RMNI-JP
mnt-by:         APNIC-HM
mnt-irt:        IRT-RMNI-JP
last-modified:  2020-10-20T13:44:48Z
source:         APNIC

irt:            IRT-RMNI-JP
address:        1-14-1 Tamagawa, Setagaya-ku, Tokyo
e-mail:         rmi-as138384@mail.rakuten.com
abuse-mailbox:  rmi-abuse@mail.rakuten.com
admin-c:        RMNI1-AP
tech-c:         RMNI1-AP
auth:           # Filtered
remarks:        rmi-as138384@mail.rakuten.com was validated on 2026-07-01
remarks:        rmi-abuse@mail.rakuten.com was validated on 2026-07-22
mnt-by:         MAINT-RMNI-JP
last-modified:  2026-07-22T04:33:27Z
source:         APNIC

organisation:   ORG-RMNI1-AP
org-name:       Rakuten Mobile, Inc.
org-type:       LIR
country:        JP
address:        1-14-1 Tamagawa, Setagaya-ku
phone:          +81-050-5817-1360
e-mail:         rmi-as138384@mail.rakuten.com
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:17:40Z
source:         APNIC

role:           ABUSE RMNIJP
country:        ZZ
address:        1-14-1 Tamagawa, Setagaya-ku, Tokyo
phone:          +000000000
e-mail:         rmi-as138384@mail.rakuten.com
admin-c:        RMNI1-AP
tech-c:         RMNI1-AP
nic-hdl:        AR792-AP
remarks:        Generated from irt object IRT-RMNI-JP
remarks:        rmi-as138384@mail.rakuten.com was validated on 2026-07-01
remarks:        rmi-abuse@mail.rakuten.com was validated on 2026-07-22
abuse-mailbox:  rmi-abuse@mail.rakuten.com
mnt-by:         APNIC-ABUSE
last-modified:  2026-07-22T04:33:48Z
source:         APNIC

role:           Rakuten Mobile Network Inc administrator
address:        1-14-1 Tamagawa, Setagaya-ku, Tokyo
country:        JP
phone:          +81-050-5817-1360
fax-no:         +81-050-5817-1360
e-mail:         rmi-as138384@mail.rakuten.com
admin-c:        RMNI1-AP
tech-c:         RMNI1-AP
nic-hdl:        RMNI1-AP
mnt-by:         MAINT-RMNI-JP
last-modified:  2021-02-14T23:12:21Z
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" : "AS23701 - AS23772",
    "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" : "AS23720",
    "as_name" : "RMNI-AS-AP",
    "description" : [ "Rakuten Mobile Network, Inc." ],
    "country" : "JP",
    "organization" : "ORG-RMNI1-AP",
    "admin_contacts" : [ "RMNI1-AP" ],
    "tech_contacts" : [ "RMNI1-AP" ],
    "abuse_contacts" : [ "AR792-AP" ],
    "mnt_irt" : [ "IRT-RMNI-JP" ],
    "mnt_lower" : [ "MAINT-RMNI-JP" ],
    "mnt_routes" : [ "MAINT-RMNI-JP" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2020-10-20",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-RMNI-JP",
    "address" : [ "1-14-1 Tamagawa, Setagaya-ku, Tokyo" ],
    "street" : "Tamagawa",
    "city" : "Setagaya-ku",
    "state" : "TOKYO",
    "email" : [ "rmi-as138384@mail.rakuten.com" ],
    "abuse_mailbox" : [ "rmi-abuse@mail.rakuten.com" ],
    "admin_contacts" : [ "RMNI1-AP" ],
    "tech_contacts" : [ "RMNI1-AP" ],
    "remarks" : [ "rmi-as138384@mail.rakuten.com was validated on 2026-07-01", "rmi-abuse@mail.rakuten.com was validated on 2026-07-22" ],
    "mnt_by" : [ "MAINT-RMNI-JP" ],
    "date_updated" : "2026-07-22",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-RMNI1-AP",
    "name" : "Rakuten Mobile, Inc.",
    "type" : "LIR",
    "address" : [ "1-14-1 Tamagawa, Setagaya-ku" ],
    "street" : "Tamagawa",
    "city" : "Setagaya-ku",
    "country" : [ "JP" ],
    "email" : [ "rmi-as138384@mail.rakuten.com" ],
    "phone" : [ "+81-050-5817-1360" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-09-05",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "RMNI1-AP",
    "name" : "Rakuten Mobile Network Inc administrator",
    "address" : [ "1-14-1 Tamagawa, Setagaya-ku, Tokyo" ],
    "street" : "Tamagawa",
    "city" : "Setagaya-ku",
    "state" : "TOKYO",
    "country" : "JP",
    "email" : [ "rmi-as138384@mail.rakuten.com" ],
    "phone" : [ "+81-050-5817-1360" ],
    "fax_no" : [ "+81-050-5817-1360" ],
    "admin_contacts" : [ "RMNI1-AP" ],
    "tech_contacts" : [ "RMNI1-AP" ],
    "mnt_by" : [ "MAINT-RMNI-JP" ],
    "date_updated" : "2021-02-14",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "RMNI1-AP",
    "name" : "Rakuten Mobile Network Inc administrator",
    "address" : [ "1-14-1 Tamagawa, Setagaya-ku, Tokyo" ],
    "street" : "Tamagawa",
    "city" : "Setagaya-ku",
    "state" : "TOKYO",
    "country" : "JP",
    "email" : [ "rmi-as138384@mail.rakuten.com" ],
    "phone" : [ "+81-050-5817-1360" ],
    "fax_no" : [ "+81-050-5817-1360" ],
    "admin_contacts" : [ "RMNI1-AP" ],
    "tech_contacts" : [ "RMNI1-AP" ],
    "mnt_by" : [ "MAINT-RMNI-JP" ],
    "date_updated" : "2021-02-14",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AR792-AP",
    "name" : "ABUSE RMNIJP",
    "address" : [ "1-14-1 Tamagawa, Setagaya-ku, Tokyo" ],
    "street" : "Tamagawa",
    "city" : "Setagaya-ku",
    "state" : "TOKYO",
    "country" : "ZZ",
    "email" : [ "rmi-as138384@mail.rakuten.com" ],
    "abuse_mailbox" : [ "rmi-abuse@mail.rakuten.com" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "RMNI1-AP" ],
    "tech_contacts" : [ "RMNI1-AP" ],
    "remarks" : [ "Generated from irt object IRT-RMNI-JP", "rmi-as138384@mail.rakuten.com was validated on 2026-07-01", "rmi-abuse@mail.rakuten.com was validated on 2026-07-22" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-07-22",
    "source" : "APNIC"
  } ]
}

Peers

AS Number	Description	Country
AS138384	Rakuten Mobile, Inc.	JP

Upstreams

AS Number	Description	Country
AS138384	Rakuten Mobile, Inc.	JP

ASN Lookup Tool

ASN Summary

AS23720 – Rakuten Mobile, Inc.

ASN Intelligence API for production workflows

IP Ranges

Raw Whois Response

Parsed Whois Response

Peers

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