AS209300 Twd2-Net

China TWD2-NET RIPE 1 IPv4 prefix 5 IPv6 prefixes

IPv4 addresses

256

IPv6 /48 networks

65,553

RPKI

5 valid1 no ROA

Peers and downstreams

Holder

AS name: TWD2-NET
Description: TWD2 Education and Research Network London, United Kingdom
Organisation: Wende Tan
Abuse contact: twd2.me+abuse@gmail.com
Assigned: 2019-02-28
Registered: 2019-03-01
Record last changed: 2026-04-30 17:20 UTC

44.30.120.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade A · 96/100

partly	Prefixes covered by valid ROAs 5 of 6 announced prefixes are RPKI valid, 1 have no ROA.	21/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 5 IPv6 prefixes.	15/15
pass	More than one upstream 7 upstreams seen in BGP.	10/10
pass	Working abuse contact twd2.me+abuse@gmail.com is published.	15/15
pass	Publishes a geofeed A geofeed (RFC 8805) tells where the address space is used.	10/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
pass	Registry record maintained Last changed 2026-04-30.	5/5

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/209300"><img src="https://ip-fd.net/badge/asn/209300/health.svg" alt="AS209300 network health on IP-FD.net"></a>

Markdown

[![AS209300 network health](https://ip-fd.net/badge/asn/209300/health.svg)](https://ip-fd.net/asn/209300)

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

Routing changes

Last 30 days

2026-10-06 08:52 UTC	Neighbour gone	AS211509	peer
2026-10-06 08:52 UTC	Relationship changed	AS58057	upstream to peer

WHOIS

aut-num:        AS209300
as-name:        TWD2-NET
descr:          TWD2 Education and Research Network
descr:          London, United Kingdom
org:            ORG-WT43-RIPE
admin-c:        WTNN1-RIPE
tech-c:         WTNN1-RIPE
abuse-c:        WTNN1-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         twd2-mnt
created:        2019-03-01T12:14:34Z
last-modified:  2026-04-30T17:20:55Z
source:         RIPE
sponsoring-org: ORG-CR158-RIPE
% 14 routing policy lines (import/export) not shown

Routing data

Updated just now

Registry record

Fetched just now from RIPE

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/209300

const res = await fetch('https://ip-fd.net/api/v1/asn/209300', {
  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/209300', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/209300');
curl_setopt($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/209300", 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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AS212683	Olilo UK & Ireland Ltd. OLILO-AS

AS24239	TWD2 Education and Research Network TWD2-NET-AS-AP
AS38255	China Education and Research Network (CERNET) FITI-AS-AP