AS39563 CTA Systems B.V.

Netherlands UCSYSTEMS RIPE 9 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

2,304

IPv6 /48 networks

65,536

RPKI

10 valid0 no ROA

Peers and downstreams

Holder

AS name: UCSYSTEMS
Description: CTA Systems B.V.
Organisation: CTA Systems B.V.
Abuse contact: abuse@ucsystems.nl
Assigned: 2017-11-09
Registered: 2017-11-10
Record last changed: 2021-06-25 17:02 UTC

185.231.16.0/24 185.231.17.0/24 185.231.18.0/24 185.231.19.0/24 185.80.10.0/24 185.80.11.0/24 185.80.8.0/24 185.80.9.0/24 85.8.131.0/24

AS1031	PEER 1031 LLC PEER1-1031
AS1103	SURF B.V. SURFNET-NL
AS1140	Stichting Internet Domeinregistratie Nederland SIDN
AS2027	MilkyWan Association MilkyWan
AS3212	Telemach Slovenija d.o.o. TELEMACH
AS3214	xTom GmbH XTOM
AS3333	Reseaux IP Europeens Network Coordination Centre (RIPE NCC) RIPE-NCC-AS
AS3399	Obenet AB OBE-NET
AS5405	Inter.link GmbH INTERDOTLINK
AS6204	TMRC GROUP SRL ZET-NET
AS6424	EDGOO NETWORKS UNIPESSOAL LDA EDGOO
AS6663	Euroweb Romania S.R.L. TTI-NET
AS6696	VERIXI SA VERIXI
AS7713	PT Telekomunikasi Indonesia telkomnet-as-ap
AS8218	Zayo Infrastructure France SA NEO-ASN
AS8298	IPng Networks GmbH IPNG
AS8529	Zain Omantel International FZ-LLC OMANTEL-AS
AS9044	BSE Software GmbH SOLNET
AS12859	BIT BV NL-BIT
AS13194	UAB "Bite Lietuva" BITE
AS14840	BR.Digital Telecom AS14840
AS14907	Wikimedia Foundation Inc. WIKIMEDIA
AS16347	ADISTA SAS INHERENT
AS20485	Joint Stock Company TransTeleCom TRANSTELECOM
AS20764	CJSC RASCOM RASCOM-AS
AS20932	Services Industriels de Geneve SIG-ST
AS22356	Durand do Brasil Ltda AS22356
AS24482	SG.GS SGGS-AS-AP
AS24961	WIIT AG MYLOC-AS
AS25091	IP-Max SA IP-Max
AS28685	Routit BV ASN-ROUTIT
AS28917	Fiord Networks, UAB Fiord-AS
AS29075	IELO-LIAZO SERVICES SAS IELO
AS29632	Netassist International EOOD NASSIST-AS
AS30886	PP KOM i TEX KOMITEX-AS
AS33891	Core-Backbone GmbH CORE-BACKBONE
AS34019	Hivane Association HIVANE
AS34927	iFog GmbH iFog-GmbH
AS35600	Vedege SAS ASN-VEDEGE
AS36236	NetActuate, Inc NETACTUATE
AS37100	SEACOM Limited
AS37468	Angola Cables
AS37721	Virtual Technologies & Solutions
AS39122	Blacknight Internet Solutions Limited BLACKNIGHT-AS
AS39351	31173 Services AB ESAB-AS
AS41327	Fiber Telecom S.p.A. FIBERTELECOM-AS
AS41666	Institute for Pyrotechnical Cleaning (limited company) PYRO-AS
AS42295	TBISS Ltd TBISS-AS
AS42541	Fiberby ApS FIBERBY
AS44097	CLEMENT CAVADORE AUTONOMOUS-CLOSET
AS45489	Sri Lanka Telecom PLC, GLobal Peering SLT-GLOBAL
AS48185	team.blue NV team_blue
AS49434	FBW NETWORKS SAS FBWNETWORKS
AS49544	i3D.net B.V i3Dnet
AS50263	A-Systems Sp. z o.o. IXP-1-IX-EU
AS50304	Blix Solutions AS BLIX
AS50629	LWLcom GmbH LWLCOM
AS50673	Serverius Holding B.V. Serverius-as
AS51088	A2B IP B.V. A2B
AS51185	MainStreaming SpA MAINSTREAMING-AS
AS56662	Eutpnet EUTPNET
AS56987	ABACLOUDA SAS AS-ABACLOUDA
AS57118	CommunityRack.org Verein COMMUNITYRACK
AS58299	Openfactory GmbH OPENFACTORY-AS
AS62167	Tismi BV Tismi
AS64475	Freifunk Frankfurt am Main e.V. FREIFUNK-FRANKFURT
AS198150	SIACOM JSC SIACOM-AS
AS199524	G-Core Labs S.A. GCORE
AS202365	Omer GOLGELI Chronos
AS204092	Association GRIFON GRIFON
AS205103	Telegraph42 Management GmbH TELEGRAPH-AS
AS205112	PHILUNET GmbH PHILUNET
AS209022	Tschajera Limited Tschajera-Limited
AS209090	Association Stolon STOLON
AS209823	Enki Multimedia EURL ENKI-AS
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD level86
AS212635	Jurrian van Iersel AS212635
AS215596	KISSGROUP SAS Kissgroup
AS263152	MIGO TELECOM AS263152
AS271253	LINK BRASIL TELECOMUNICACOES LTDA AS271253
AS401753	BIXCE Inc BIXCE

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 85/100

pass	Prefixes covered by valid ROAs 10 of 10 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 1 IPv6 prefix.	15/15
pass	More than one upstream 5 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@ucsystems.nl 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 2021-06-25.	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/39563"><img src="https://ip-fd.net/badge/asn/39563/health.svg" alt="AS39563 network health on IP-FD.net"></a>

Markdown

[![AS39563 network health](https://ip-fd.net/badge/asn/39563/health.svg)](https://ip-fd.net/asn/39563)

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

Routing changes

Last 30 days

2026-10-04 19:42 UTC	Neighbour gone	AS58057	upstream
2026-10-04 19:42 UTC	Neighbour gone	AS56655	upstream
2026-10-04 19:42 UTC	Neighbour gone	AS50869	upstream
2026-10-04 19:42 UTC	Neighbour gone	AS41051	upstream
2026-10-04 19:42 UTC	Relationship changed	AS34019	upstream to peer
2026-10-04 19:42 UTC	New neighbour	AS28917	peer
2026-10-04 19:42 UTC	Relationship changed	AS9044	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS8218	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS7713	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS6696	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 19:42 UTC	New neighbour	AS57118	peer
2026-10-04 19:42 UTC	Relationship changed	AS5405	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS50673	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS50304	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS50263	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS42295	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS41327	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS401753	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS39351	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS37468	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS37100	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS33891	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS30886	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS29632	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS28685	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS25091	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS24961	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS22356	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS215596	upstream to peer
2026-10-04 19:42 UTC	New neighbour	AS209090	peer
2026-10-04 19:42 UTC	Relationship changed	AS209022	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS20764	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS205103	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS20485	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS14840	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS13194	upstream to peer
2026-10-04 19:42 UTC	Relationship changed	AS1031	upstream to peer

WHOIS

aut-num:        AS39563
as-name:        UCSYSTEMS
org:            ORG-CSB11-RIPE
admin-c:        UCS9-RIPE
tech-c:         UCS9-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         UCSYSTEMS-MNT
created:        2017-11-10T15:15:11Z
last-modified:  2021-06-25T17:02:17Z
source:         RIPE
% 4 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/39563

const res = await fetch('https://ip-fd.net/api/v1/asn/39563', {
  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/39563', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/39563');
curl_setopt($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/39563", 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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AS24785	Broadband Hosting B.V. JOINTTRANSIT-AS
AS35133	Eranium B.V. ERANIUM
AS43350	NForce Entertainment B.V. NFORCE