AS173 Nippon Telegraph and Telephone Corporation

Japan NTTECL-AS APNIC 2 IPv4 prefixes 0 IPv6 prefixes

IPv4 addresses

8,704

IPv6 /48 networks

RPKI

2 valid0 no ROA

Peers and downstreams

Holder

AS name: NTTECL-AS
Description: Nippon Telegraph and Telephone Corporation
Organisation: Nippon Telegraph and Telephone Corporation
Abuse contact: Not published
Assigned: 2002-07-31
Registered: 2008-09-04
Record last changed: 2023-01-11 04:52 UTC

163.138.160.0/19 192.47.168.0/23

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade C · 70/100

pass	Prefixes covered by valid ROAs 2 of 2 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
fail	Announces IPv6 No IPv6 prefixes are announced.	0/15
pass	More than one upstream 2 upstreams seen in BGP.	10/10
pass	Working abuse contact rd-it-helpdesk@ml.ntt.com is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
fail	Registry record maintained Last changed 2023-01-11.	0/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/173"><img src="https://ip-fd.net/badge/asn/173/health.svg" alt="AS173 network health on IP-FD.net"></a>

Markdown

[![AS173 network health](https://ip-fd.net/badge/asn/173/health.svg)](https://ip-fd.net/asn/173)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

2026-10-04 04:02 UTC	Neighbour gone	AS9370	upstream
2026-10-04 04:02 UTC	Relationship changed	AS8966	upstream to peer
2026-10-04 04:02 UTC	Relationship changed	AS7521	upstream to peer
2026-10-04 04:02 UTC	Relationship changed	AS20485	upstream to peer
2026-10-04 04:02 UTC	New neighbour	AS17686	peer

WHOIS

aut-num:        AS173
as-name:        NTTECL-AS
handle:         AS173
remarks:        Nippon Telegraph and Telephone Corporation
technical,administrative:TF79-AP (Tomohiro Fujisaki) <fujisaki@venus.gr.jp>
registrant:     ORG-NTAT1-AP (Nippon Telegraph and Telephone Corporation) <it-pb@ml.ntt.com>
abuse:          IRT-NTTECL-JP (IRT-NTTECL-JP) <rd-it-helpdesk@ml.ntt.com>
registration:   2008-09-04T06:40:33Z
last changed:   2023-01-11T04:52:30Z
source:         APNIC (RDAP)

Routing data

Updated 17 h ago

Registry record

Fetched 17 h ago from APNIC RDAP

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/173

const res = await fetch('https://ip-fd.net/api/v1/asn/173', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/173', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/173');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/173", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Works without a key at a lower rate. Get a free key.

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AS7521	INTERNET MULTIFEED CO. MFEED
AS8966	EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC Etisalat-AS
AS9002	RETN Limited RETN-AS
AS17639	Converge ICT Solutions Inc. CONVERGE-AS
AS17686	ACCELIA
AS20485	Joint Stock Company TransTeleCom TRANSTELECOM
AS24482	SG.GS SGGS-AS-AP
AS45489	Sri Lanka Telecom PLC, GLobal Peering SLT-GLOBAL
AS49544	i3D.net B.V i3Dnet