AS209771 SYSN LTD

United Kingdom SYSN RIPE 0 IPv4 prefixes 5 IPv6 prefixes

IPv4 addresses

IPv6 /48 networks

RPKI

3 valid2 no ROA

Peers and downstreams

Holder

AS name: SYSN
Description: SYSN LTD
Organisation: SYSN LTD
Abuse contact: abuse@sysn.co.uk
Assigned: 2018-12-04
Registered: 2018-12-05
Record last changed: 2026-09-14 10:07 UTC

None announced.

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 80/100

partly	Prefixes covered by valid ROAs 3 of 5 announced prefixes are RPKI valid, 2 have no ROA.	15/25
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 4 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@sysn.co.uk 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
pass	Registry record maintained Last changed 2026-09-14.	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/209771"><img src="https://ip-fd.net/badge/asn/209771/health.svg" alt="AS209771 network health on IP-FD.net"></a>

Markdown

[![AS209771 network health](https://ip-fd.net/badge/asn/209771/health.svg)](https://ip-fd.net/asn/209771)

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

Routing changes

Last 30 days

2026-10-04 09:14 UTC	Neighbour gone	AS41666	peer
2026-10-04 09:14 UTC	New neighbour	AS8888	peer
2026-10-04 09:14 UTC	New neighbour	AS51088	peer
2026-10-04 09:14 UTC	New neighbour	AS28917	peer
2026-10-04 09:14 UTC	New neighbour	AS271253	peer
2026-10-04 09:14 UTC	New neighbour	AS24961	peer
2026-10-04 09:14 UTC	Relationship changed	AS8298	upstream to peer
2026-10-04 09:14 UTC	New neighbour	AS62000	peer
2026-10-04 09:14 UTC	Relationship changed	AS48646	upstream to peer
2026-10-04 09:14 UTC	New neighbour	AS41051	upstream
2026-10-04 09:14 UTC	Relationship changed	AS401753	upstream to peer
2026-10-04 09:14 UTC	New neighbour	AS34927	peer
2026-10-04 09:14 UTC	Relationship changed	AS25091	upstream to peer
2026-10-04 09:14 UTC	New neighbour	AS11967	upstream
2026-10-04 09:14 UTC	New prefix	2a0c:6500:23f::/48
2026-10-04 09:14 UTC	New prefix	2a0e:46c6:4fe::/48
2026-10-04 09:14 UTC	New prefix	2a0c:6500:23e::/48

WHOIS

aut-num:        AS209771
as-name:        SYSN
org:            ORG-SL977-RIPE
remarks:        For any inquiries use: noc@sysn.co.uk
remarks:        ============ TRANSIT PROVIDERS ============
remarks:        Meerfarbig
remarks:        Hurricane Electric
remarks:        Openfactory
remarks:        SDRmedia Verwaltungs GmbH
remarks:        Hop179 OU
remarks:        ============== IXP ==============
remarks:        LocIX
remarks:        KleyReX
remarks:        ========== DIRECT PEERS ==========
remarks:        Cloudflare
remarks:        ================================
sponsoring-org: ORG-MM735-RIPE
admin-c:        SL13635-RIPE
tech-c:         SL13635-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         SYSN-MNT
created:        2018-12-05T13:35:02Z
last-modified:  2026-09-14T10:07:53Z
source:         RIPE
% 34 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/209771

const res = await fetch('https://ip-fd.net/api/v1/asn/209771', {
  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/209771', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/209771');
curl_setopt($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/209771", 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.

AS6939	Hurricane Electric LLC HURRICANE
AS11967	Hop179 OU HOP179
AS34549	meerfarbig GmbH & Co. KG MEER-AS
AS41051	Openfactory GmbH FREETRANSIT

AS3214	xTom GmbH XTOM
AS8298	IPng Networks GmbH IPNG
AS8888	xTom Pty Ltd XTOM
AS24482	SG.GS SGGS-AS-AP
AS24961	WIIT AG MYLOC-AS
AS25091	IP-Max SA IP-Max
AS28917	Fiord Networks, UAB Fiord-AS
AS34872	Sarah Rossius trading as Servperso Systems Servperso_Systems
AS34927	iFog GmbH iFog-GmbH
AS42541	Fiberby ApS FIBERBY
AS48646	SDRmedia Verwaltungs GmbH STEFAN6
AS51088	A2B IP B.V. A2B
AS51185	MainStreaming SpA MAINSTREAMING-AS
AS56662	Eutpnet EUTPNET
AS58299	Openfactory GmbH OPENFACTORY-AS
AS62000	SERVERD SAS AS62000
AS210937	Showfom
AS213151	Christian Elsen CHRISELSEN
AS271253	LINK BRASIL TELECOMUNICACOES LTDA AS271253
AS401753	BIXCE Inc BIXCE