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?

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.

AS55817 Nippon Telegraph and Telephone Corporation

ASN Lookup Tool

Search ASN

AS Data

IP Routes

Raw Whois

Parsed Whois

Peers

Upstreams

Downstreams

Contacts

Legacy Routes

Nippon Telegraph and Telephone Corporation

JP 0 Routes

AS Data

AS55817

AS55817 – Nippon Telegraph and Telephone Corporation

AS Number	55817
AS Name
Organization	Nippon Telegraph and Telephone Corporation (org-ntat1-ap)
Country	JP
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	ISP
Registry	APNIC
Date Allocated	2010-10-15

ASN Intelligence API for production workflows

Use ASN data for AS55817 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

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 '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:        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 '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 2026-10-02
mnt-by:         MAINT-JP-NTTECL-JP
last-modified:  2026-10-02T01:46:43Z
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 2026-10-02
abuse-mailbox:  rd-it-helpdesk@ml.ntt.com
mnt-by:         APNIC-ABUSE
last-modified:  2026-10-02T01:47:02Z
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"
  } ],
  "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"
  } ],
  "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 2026-10-02" ],
    "mnt_by" : [ "MAINT-JP-NTTECL-JP" ],
    "date_updated" : "2026-10-02",
    "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 2026-10-02" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-10-02",
    "source" : "APNIC",
    "addressCountry" : "JAPAN"
  } ]
}

ASN Lookup Tool

ASN Summary

AS55817 – Nippon Telegraph and Telephone Corporation

ASN Intelligence API for production workflows

Raw Whois Response

Parsed Whois Response

Ready to get started?Get Started with IP Intelligence API Today

Frequently Asked Questions