ASN AS173 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS173?

AS173 is listed under Nippon Telegraph and Telephone Corporation.

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?

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AS173 Nippon Telegraph and Telephone Corporation

Nippon Telegraph and Telephone Corporation

JP 2 Routes

AS Data

AS173

AS173 – Nippon Telegraph and Telephone Corporation

AS Number	173
AS Name
Organization	Nippon Telegraph and Telephone Corporation(org-ntat1-ap)
Country	JP
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	ISP
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS173 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
192.47.168.0/23	AS173	Nippon Telegraph and Telephone Corporation	Nippon Telegraph and Telephone Corporation	512
163.138.160.0/19	AS173	Nippon Telegraph and Telephone Corporation	Nippon Telegraph and Telephone Corporation	8192

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 'AS173'

% Abuse contact for 'AS173' is 'rd-it-helpdesk@ml.ntt.com'

aut-num:        AS173
as-name:        NTTECL-AS
descr:          Nippon Telegraph and Telephone Corporation
country:        JP
org:            ORG-NTAT1-AP
admin-c:        TF79-AP
tech-c:         TF79-AP
abuse-c:        AN845-AP
mnt-lower:      MAINT-JP-NTTECL-JP
mnt-routes:     MAINT-JP-NTTECL-JP
mnt-by:         APNIC-HM
mnt-irt:        IRT-NTTECL-JP
last-modified:  2023-01-11T04:52:30Z
source:         APNIC

irt:            IRT-NTTECL-JP
address:        3-9-11 Midori-cho, Musashino-shi, Tokyo, Japan
e-mail:         rd-it-helpdesk@ml.ntt.com
abuse-mailbox:  rd-it-helpdesk@ml.ntt.com
admin-c:        TF79-AP
tech-c:         TF79-AP
auth:           # Filtered
remarks:        rd-it-helpdesk@ml.ntt.com was validated on 2026-02-26
mnt-by:         MAINT-JP-NTTECL-JP
last-modified:  2026-02-26T04:02:11Z
source:         APNIC

organisation:   ORG-NTAT1-AP
org-name:       Nippon Telegraph and Telephone Corporation
org-type:       LIR
country:        JP
address:        3-9-11 Midori-cho Musashino-shi
phone:          +81-422-59-2725
fax-no:         +81-422-59-5637
e-mail:         it-pb@ml.ntt.com
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:59Z
source:         APNIC

role:           ABUSE NTTECLJP
country:        ZZ
address:        3-9-11 Midori-cho, Musashino-shi, Tokyo, Japan
phone:          +000000000
e-mail:         rd-it-helpdesk@ml.ntt.com
admin-c:        TF79-AP
tech-c:         TF79-AP
nic-hdl:        AN845-AP
remarks:        Generated from irt object IRT-NTTECL-JP
remarks:        rd-it-helpdesk@ml.ntt.com was validated on 2026-02-26
abuse-mailbox:  rd-it-helpdesk@ml.ntt.com
mnt-by:         APNIC-ABUSE
last-modified:  2026-02-26T04:02:33Z
source:         APNIC

person:         Tomohiro Fujisaki
nic-hdl:        TF79-AP
e-mail:         fujisaki@venus.gr.jp
address:        3-9-11 Midori-sho, Musashino-shi, Tokyo, Japan
phone:          +81-422-59-7351
fax-no:         +81-422-59-5652
country:        JP
mnt-by:         MAINT-JP-NTTECL-JP
last-modified:  2022-07-21T13:05:18Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-UK2)



#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       173
ASName:         APNIC-173
ASHandle:       AS173
RegDate:        2002-07-31
Updated:        2009-10-08
Comment:        This AS number is not registered in the ARIN database.
Comment:        For details, refer to the APNIC Whois Database via
Comment:        WHOIS.APNIC.NET or http://wq.apnic.net/apnic-bin/whois.pl    
Ref:            https://rdap.arin.net/registry/autnum/173

ResourceLink:  https://apps.db.ripe.net/db-web-ui/query
ResourceLink:  whois.apnic.net


OrgName:        Asia Pacific Network Information Centre
OrgId:          APNIC
Address:        PO Box 3646
City:           South Brisbane
StateProv:      QLD
PostalCode:     4101
Country:        AU
RegDate:        
Updated:        2012-01-24
Ref:            https://rdap.arin.net/registry/entity/APNIC

ReferralServer:  whois://whois.apnic.net
ResourceLink:  http://wq.apnic.net/whois-search/static/search.html

OrgTechHandle: AWC12-ARIN
OrgTechName:   APNIC Whois Contact
OrgTechPhone:  +61 7 3858 3188 
OrgTechEmail:  search-apnic-not-arin@apnic.net
OrgTechRef:    https://rdap.arin.net/registry/entity/AWC12-ARIN

OrgAbuseHandle: AWC12-ARIN
OrgAbuseName:   APNIC Whois Contact
OrgAbusePhone:  +61 7 3858 3188 
OrgAbuseEmail:  search-apnic-not-arin@apnic.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/AWC12-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "aut_nums" : [ {
    "aut_num" : "AS173",
    "as_name" : "NTTECL-AS",
    "description" : [ "Nippon Telegraph and Telephone Corporation" ],
    "country" : "JP",
    "organization" : "ORG-NTAT1-AP",
    "admin_contacts" : [ "TF79-AP" ],
    "tech_contacts" : [ "TF79-AP" ],
    "abuse_contacts" : [ "AN845-AP" ],
    "mnt_irt" : [ "IRT-NTTECL-JP" ],
    "mnt_lower" : [ "MAINT-JP-NTTECL-JP" ],
    "mnt_routes" : [ "MAINT-JP-NTTECL-JP" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-01-11",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-NTTECL-JP",
    "address" : [ "3-9-11 Midori-cho, Musashino-shi, Tokyo, Japan" ],
    "street" : "Midori-cho",
    "city" : "Musashino-shi",
    "state" : "TOKYO",
    "country" : "JAPAN",
    "email" : [ "rd-it-helpdesk@ml.ntt.com" ],
    "abuse_mailbox" : [ "rd-it-helpdesk@ml.ntt.com" ],
    "admin_contacts" : [ "TF79-AP" ],
    "tech_contacts" : [ "TF79-AP" ],
    "remarks" : [ "rd-it-helpdesk@ml.ntt.com was validated on 2026-02-26" ],
    "mnt_by" : [ "MAINT-JP-NTTECL-JP" ],
    "date_updated" : "2026-02-26",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-NTAT1-AP",
    "name" : "Nippon Telegraph and Telephone Corporation",
    "type" : "LIR",
    "address" : [ "3-9-11 Midori-cho Musashino-shi" ],
    "street" : "Midori-cho",
    "city" : "Musashino-shi",
    "country" : [ "JP" ],
    "email" : [ "it-pb@ml.ntt.com" ],
    "phone" : [ "+81-422-59-2725" ],
    "fax_no" : [ "+81-422-59-5637" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-09-05",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "TF79-AP",
    "name" : "Tomohiro Fujisaki",
    "address" : [ "3-9-11 Midori-sho, Musashino-shi, Tokyo, Japan" ],
    "city" : "Musashino-shi",
    "state" : "TOKYO",
    "country" : "JP",
    "email" : [ "fujisaki@venus.gr.jp" ],
    "phone" : [ "+81-422-59-7351" ],
    "fax_no" : [ "+81-422-59-5652" ],
    "mnt_by" : [ "MAINT-JP-NTTECL-JP" ],
    "date_updated" : "2022-07-21",
    "source" : "APNIC",
    "addressCountry" : "JAPAN"
  } ],
  "technical_contacts" : [ {
    "handle" : "TF79-AP",
    "name" : "Tomohiro Fujisaki",
    "address" : [ "3-9-11 Midori-sho, Musashino-shi, Tokyo, Japan" ],
    "city" : "Musashino-shi",
    "state" : "TOKYO",
    "country" : "JP",
    "email" : [ "fujisaki@venus.gr.jp" ],
    "phone" : [ "+81-422-59-7351" ],
    "fax_no" : [ "+81-422-59-5652" ],
    "mnt_by" : [ "MAINT-JP-NTTECL-JP" ],
    "date_updated" : "2022-07-21",
    "source" : "APNIC",
    "addressCountry" : "JAPAN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AN845-AP",
    "name" : "ABUSE NTTECLJP",
    "address" : [ "3-9-11 Midori-cho, Musashino-shi, Tokyo, Japan" ],
    "street" : "Midori-cho",
    "city" : "Musashino-shi",
    "state" : "TOKYO",
    "country" : "ZZ",
    "email" : [ "rd-it-helpdesk@ml.ntt.com" ],
    "abuse_mailbox" : [ "rd-it-helpdesk@ml.ntt.com" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "TF79-AP" ],
    "tech_contacts" : [ "TF79-AP" ],
    "remarks" : [ "Generated from irt object IRT-NTTECL-JP", "rd-it-helpdesk@ml.ntt.com was validated on 2026-02-26" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-02-26",
    "source" : "APNIC",
    "addressCountry" : "JAPAN"
  } ]
}

Peers

AS Number	Description	Country
AS24482	SG.GS	SG
AS2511	Nippon Telegraph and Telephone Corporation	JP
AS45489	Sri Lanka Telecom Ltd	LK
AS7521	INTERNET MULTIFEED CO.	JP
AS9002	RETN Limited	GB
AS45489	Sri Lanka Telecom PLC, GLobal Peering	LK
AS6939	Hurricane Electric LLC	US
AS4775	Globe Telecoms	PH
AS8849	Melbikomas UAB	LT
AS17639	Converge ICT Solutions Inc.	PH

Upstreams

AS Number	Description	Country
AS9370	SAKURA Internet Inc.	JP
AS7521	INTERNET MULTIFEED CO.	JP
AS6939	Hurricane Electric LLC	US
AS20485	Joint Stock Company TransTeleCom	RU
AS2518	BIGLOBE Inc.	JP

Downstreams

AS Number	Description	Country
AS2511	Nippon Telegraph and Telephone Corporation	JP

ASN Lookup Tool

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