ASN AS55817 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS55817?

AS55817 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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AS55817 Nippon Telegraph and Telephone Corporation

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AS Data

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Raw Whois

Parsed Whois

Peers

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Legacy Routes

Nippon Telegraph and Telephone Corporation ml.ntt.com

JP 0 Routes

AS Data

AS55817

AS55817 – Nippon Telegraph and Telephone Corporation

AS Number	55817
AS Name	NTTECL-AS-AP
Organization	Nippon Telegraph and Telephone Corporation (org-ntat1-ap)
Country	JP
Website	ml.ntt.com
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	ISP
Registry	APNIC
Date Allocated	N/A

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Raw Whois Response

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

% Information related to 'AS55296 - AS56319'

as-block:       AS55296 - AS56319
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:  2009-09-03T01:15:30Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
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:  2013-10-23T04:06:51Z
source:         APNIC

% Information related to 'AS55817'

% Abuse contact for 'AS55817' is 'rd-it-helpdesk@ml.ntt.com'

aut-num:        AS55817
as-name:        NTTECL-AS-AP
descr:          Nippon Telegraph and Telephone Corporation PF Labs
descr:          3-9-11 Midori-cho Musashino-shi
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:  2020-07-07T05:01:03Z
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:       55296 - 56319
ASName:         APNIC-55296
ASHandle:       AS55296
RegDate:        2009-09-15
Updated:        2009-10-08
Comment:        These AS numbers are 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/55296

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.
#

[ 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 'AS55296 - AS56319'

as-block:       AS55296 - AS56319
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:  2009-09-03T01:15:30Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
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:  2013-10-23T04:06:51Z
source:         APNIC

% Information related to 'AS55817'

% Abuse contact for 'AS55817' is 'rd-it-helpdesk@ml.ntt.com'

aut-num:        AS55817
as-name:        NTTECL-AS-AP
descr:          Nippon Telegraph and Telephone Corporation PF Labs
descr:          3-9-11 Midori-cho Musashino-shi
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:  2020-07-07T05:01:03Z
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 1.88.48 (WHOIS-US2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS55296 - AS56319",
    "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" : "2009-09-03",
    "source" : "APNIC"
  }, {
    "as_block" : "AS55296 - AS56319",
    "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" : "2009-09-03",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS55817",
    "as_name" : "NTTECL-AS-AP",
    "description" : [ "Nippon Telegraph and Telephone Corporation PF Labs", "3-9-11 Midori-cho Musashino-shi" ],
    "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" : "2020-07-07",
    "source" : "APNIC"
  }, {
    "aut_num" : "AS55817",
    "as_name" : "NTTECL-AS-AP",
    "description" : [ "Nippon Telegraph and Telephone Corporation PF Labs", "3-9-11 Midori-cho Musashino-shi" ],
    "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" : "2020-07-07",
    "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"
  } ]
}