ASN AS23748 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS23748?

AS23748 is listed under Cat Networks K.K..

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.

AS23748 Cat Networks K.K. | IPGeolocation.io

ASN Lookup Tool

Cat Networks K.K. cat.net

JP 0 Routes

AS Data

AS23748

AS23748 – Cat Networks K.K.

AS Number	23748
AS Name	Cat Networks K.K.
Organization	Cat Networks K.K. (org-cnk1-ap)
Country	JP
Website	cat.net
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	ISP
Registry	APNIC
Date Allocated	2018-03-14

ASN Intelligence API for production workflows

Use ASN data for AS23748 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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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 'AS23748'

% Abuse contact for 'AS23748' is 'abuse@catnetworks.co.jp'

aut-num:        AS23748
as-name:        CAT-AS-AP
descr:          Cat Networks K.K.
country:        JP
org:            ORG-CNK1-AP
admin-c:        CNKA1-AP
tech-c:         CNKA1-AP
abuse-c:        AC1582-AP
mnt-lower:      MAINT-CAT-JP
mnt-routes:     MAINT-CAT-JP
mnt-by:         APNIC-HM
mnt-irt:        IRT-CAT-JP
last-modified:  2020-05-12T13:56:45Z
source:         APNIC

irt:            IRT-CAT-JP
address:        6-Chome 7-2 Nishitenma, Kita-ku, Osaka Osaka 530-0047
e-mail:         noc@catnetworks.co.jp
abuse-mailbox:  abuse@catnetworks.co.jp
admin-c:        CNKA1-AP
tech-c:         CNKA1-AP
auth:           # Filtered
remarks:        noc@catnetworks.co.jp was validated on 2026-09-15
remarks:        abuse@catnetworks.co.jp was validated on 2026-09-15
mnt-by:         MAINT-CAT-JP
last-modified:  2026-09-15T13:20:02Z
source:         APNIC

organisation:   ORG-CNK1-AP
org-name:       Cat Networks K.K.
org-type:       LIR
country:        JP
address:        6-Chome 7-2 Nishitenma
address:        Kita-ku
phone:          +81-669499281
fax-no:         +81-669499282
e-mail:         info@catnetworks.co.jp
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:17:12Z
source:         APNIC

role:           ABUSE CATJP
country:        ZZ
address:        6-Chome 7-2 Nishitenma, Kita-ku, Osaka Osaka 530-0047
phone:          +000000000
e-mail:         noc@catnetworks.co.jp
admin-c:        CNKA1-AP
tech-c:         CNKA1-AP
nic-hdl:        AC1582-AP
remarks:        Generated from irt object IRT-CAT-JP
remarks:        noc@catnetworks.co.jp was validated on 2026-09-15
remarks:        abuse@catnetworks.co.jp was validated on 2026-09-15
abuse-mailbox:  abuse@catnetworks.co.jp
mnt-by:         APNIC-ABUSE
last-modified:  2026-09-15T13:20:13Z
source:         APNIC

role:           Cat Networks KK administrator
address:        6-Chome 7-2 Nishitenma, Kita-ku, Osaka Osaka 530-0047
country:        JP
phone:          +81-0669499281
fax-no:         +81-0669499281
e-mail:         abuse@catnetworks.co.jp
admin-c:        CNKA1-AP
tech-c:         CNKA1-AP
nic-hdl:        CNKA1-AP
mnt-by:         MAINT-CAT-JP
last-modified:  2017-03-15T08:36:07Z
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" : "AS23748",
    "as_name" : "CAT-AS-AP",
    "description" : [ "Cat Networks K.K." ],
    "country" : "JP",
    "organization" : "ORG-CNK1-AP",
    "admin_contacts" : [ "CNKA1-AP" ],
    "tech_contacts" : [ "CNKA1-AP" ],
    "abuse_contacts" : [ "AC1582-AP" ],
    "mnt_irt" : [ "IRT-CAT-JP" ],
    "mnt_lower" : [ "MAINT-CAT-JP" ],
    "mnt_routes" : [ "MAINT-CAT-JP" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2020-05-12",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-CAT-JP",
    "address" : [ "6-Chome 7-2 Nishitenma, Kita-ku, Osaka Osaka 530-0047" ],
    "city" : "Osaka Osaka",
    "zip_code" : "530-0047",
    "email" : [ "noc@catnetworks.co.jp" ],
    "abuse_mailbox" : [ "abuse@catnetworks.co.jp" ],
    "admin_contacts" : [ "CNKA1-AP" ],
    "tech_contacts" : [ "CNKA1-AP" ],
    "remarks" : [ "noc@catnetworks.co.jp was validated on 2026-09-15", "abuse@catnetworks.co.jp was validated on 2026-09-15" ],
    "mnt_by" : [ "MAINT-CAT-JP" ],
    "date_updated" : "2026-09-15",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-CNK1-AP",
    "name" : "Cat Networks K.K.",
    "type" : "LIR",
    "address" : [ "6-Chome 7-2 Nishitenma", "Kita-ku" ],
    "city" : "Kita-ku",
    "country" : [ "JP" ],
    "email" : [ "info@catnetworks.co.jp" ],
    "phone" : [ "+81-669499281" ],
    "fax_no" : [ "+81-669499282" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-09-05",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "CNKA1-AP",
    "name" : "Cat Networks KK administrator",
    "address" : [ "6-Chome 7-2 Nishitenma, Kita-ku, Osaka Osaka 530-0047" ],
    "city" : "Osaka Osaka",
    "zip_code" : "530-0047",
    "country" : "JP",
    "email" : [ "abuse@catnetworks.co.jp" ],
    "phone" : [ "+81-0669499281" ],
    "fax_no" : [ "+81-0669499281" ],
    "admin_contacts" : [ "CNKA1-AP" ],
    "tech_contacts" : [ "CNKA1-AP" ],
    "mnt_by" : [ "MAINT-CAT-JP" ],
    "date_updated" : "2017-03-15",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "CNKA1-AP",
    "name" : "Cat Networks KK administrator",
    "address" : [ "6-Chome 7-2 Nishitenma, Kita-ku, Osaka Osaka 530-0047" ],
    "city" : "Osaka Osaka",
    "zip_code" : "530-0047",
    "country" : "JP",
    "email" : [ "abuse@catnetworks.co.jp" ],
    "phone" : [ "+81-0669499281" ],
    "fax_no" : [ "+81-0669499281" ],
    "admin_contacts" : [ "CNKA1-AP" ],
    "tech_contacts" : [ "CNKA1-AP" ],
    "mnt_by" : [ "MAINT-CAT-JP" ],
    "date_updated" : "2017-03-15",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AC1582-AP",
    "name" : "ABUSE CATJP",
    "address" : [ "6-Chome 7-2 Nishitenma, Kita-ku, Osaka Osaka 530-0047" ],
    "city" : "Osaka Osaka",
    "zip_code" : "530-0047",
    "country" : "ZZ",
    "email" : [ "noc@catnetworks.co.jp" ],
    "abuse_mailbox" : [ "abuse@catnetworks.co.jp" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "CNKA1-AP" ],
    "tech_contacts" : [ "CNKA1-AP" ],
    "remarks" : [ "Generated from irt object IRT-CAT-JP", "noc@catnetworks.co.jp was validated on 2026-09-15", "abuse@catnetworks.co.jp was validated on 2026-09-15" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-09-15",
    "source" : "APNIC"
  } ]
}

Peers

AS Number	Description	Country
AS45681	Show Corporation	JP
AS4785	xTom Limited	GB
AS215239	Show Corporation	JP

Upstreams

AS Number	Description	Country
AS4785	xTom Limited	GB

Downstreams

AS Number	Description	Country
AS45681	Show Corporation	JP
AS215239	Show Corporation	JP