AS25151 Cyso Group B.V.

Netherlands CYSO-AS RIPE 16 IPv4 prefixes 4 IPv6 prefixes

IPv4 addresses

15,872

IPv6 /48 networks

589,825

RPKI

16 valid4 no ROA

Peers and downstreams

Holder

AS name: CYSO-AS
Description: Cyso Group B.V.
Organisation: Cyso Group B.V.
Registered in: Alkmaar, Netherlands
Abuse contact: abuse@cyso.net
Assigned: 2002-08-08
Registered: 2002-09-16
Record last changed: 2026-09-29 15:49 UTC

109.235.72.0/21 130.193.5.0/24 185.123.55.0/24 185.54.112.0/22 193.33.220.0/24 2.57.56.0/24 37.46.136.0/21 37.72.138.0/24 45.134.223.0/24 62.129.139.0/24 62.129.149.0/24 80.85.160.0/23 80.85.160.0/24 81.24.0.0/20 85.158.200.0/21 93.94.224.0/21

AS559	SWITCH Switch
AS1031	PEER 1031 LLC PEER1-1031
AS1103	SURF B.V. SURFNET-NL
AS1140	Stichting Internet Domeinregistratie Nederland SIDN
AS1267	WIND TRE S.P.A. ASN-WINDTRE
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH NEXTLAYER-AS
AS1828	Unitas Global UNITAS
AS3216	PJSC "Vimpelcom" SOVAM-AS
AS3333	Reseaux IP Europeens Network Coordination Centre (RIPE NCC) RIPE-NCC-AS
AS4455	IX Reach Ltd BSO
AS5405	Inter.link GmbH INTERDOTLINK
AS6057	Administracion Nacional de Telecomunicaciones AS6057
AS6663	Euroweb Romania S.R.L. TTI-NET
AS6777	Amsterdam Internet Exchange B.V. AMS-IX-RS
AS6797	GlobalConnect AB GLOBALCONNECT-NET
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
AS12637	SEEWEB s.r.l. SEEWEB
AS12779	IT.Gate S.p.A. ITGATE
AS12859	BIT BV NL-BIT
AS12969	Ljosleidarinn ehf Vodafone_Iceland
AS13237	euNetworks GmbH LAMBDANET-AS
AS14630	Invesco Group Services, Inc. INVESCO
AS14840	BR.Digital Telecom AS14840
AS14907	Wikimedia Foundation Inc. WIKIMEDIA
AS15535	Virtual Access Internet BV VIRTUALXS-AS
AS15547	netplus.ch SA NETPLUS
AS15576	NTS workspace AG NTS
AS15605	Connesi s.p.a. CONNESI
AS15802	Emirates Integrated Telecommunications Company PJSC DU-AS1
AS15958	CETIN Ltd. Belgrade CETIN_doo_AS
AS17557	Pakistan Telecommunication Company Limited PKTELECOM-AS-PK
AS17639	Converge ICT Solutions Inc. CONVERGE-AS
AS18106	Viewqwest Pte Ltd VIEWQWEST-SG-AP
AS20764	CJSC RASCOM RASCOM-AS
AS20766	Association "Gitoyen" GITOYEN-MAIN-AS
AS20932	Services Industriels de Geneve SIG-ST
AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd UGNI
AS22356	Durand do Brasil Ltda AS22356
AS24482	SG.GS SGGS-AS-AP
AS24961	WIIT AG MYLOC-AS
AS25160	Vorboss Limited VORBOSS
AS25220	equada network GmbH GLOBALNOC-AS
AS28917	Fiord Networks, UAB Fiord-AS
AS29075	IELO-LIAZO SERVICES SAS IELO
AS29140	Hostserver GmbH HOSTSERVER-AS
AS29632	Netassist International EOOD NASSIST-AS
AS30844	Liquid Telecommunications Ltd LIQUID-AS
AS33891	Core-Backbone GmbH CORE-BACKBONE
AS34019	Hivane Association HIVANE
AS34177	Celeste SAS CELESTE-AS
AS34288	Kantonsschule Zug AS34288
AS34927	iFog GmbH iFog-GmbH
AS35280	F5 Networks SARL F5
AS36236	NetActuate, Inc NETACTUATE
AS37100	SEACOM Limited
AS37468	Angola Cables
AS37497	Network Platforms (PTY) LTD
AS37721	Virtual Technologies & Solutions
AS39122	Blacknight Internet Solutions Limited BLACKNIGHT-AS
AS39249	Netassist International EOOD KICUA-AS
AS39351	31173 Services AB ESAB-AS
AS39686	Eurofiber Nederland BV AS-EUROFIBER
AS41327	Fiber Telecom S.p.A. FIBERTELECOM-AS
AS42541	Fiberby ApS FIBERBY
AS42708	Glesys AB GLESYS
AS44901	Belcloud LTD belcloud
AS45489	Sri Lanka Telecom PLC, GLobal Peering SLT-GLOBAL
AS47147	Anexia Cloud Solutions GmbH AS-ANX
AS48185	team.blue NV team_blue
AS48362	Tkswf TKSWF-AS
AS48919	UACITY Ltd. UA-CITY-AS
AS49544	i3D.net B.V i3Dnet
AS49559	A-Systems Sp. z o.o. IPT-1-IX
AS49605	Digital Telecommunication Services S.r.l. DTS-AS
AS50300	CustodianDC Limited CUSTDC
AS50629	LWLcom GmbH LWLCOM
AS50673	Serverius Holding B.V. Serverius-as
AS50763	Robert McKay MCKAYCOM
AS51088	A2B IP B.V. A2B
AS51184	Fonira Telekom GmbH FONIRA
AS51185	MainStreaming SpA MAINSTREAMING-AS
AS51873	Arcade Solutions AG AS-ARCADE
AS56655	Gigahost AS GIGAHOST
AS56987	ABACLOUDA SAS AS-ABACLOUDA
AS61049	Exascale Ltd EXASCALE
AS61573	IP TELECOM AS61573
AS198150	SIACOM JSC SIACOM-AS
AS199524	G-Core Labs S.A. GCORE
AS199938	Netzwerge GmbH NETZWERGE
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD level86
AS212635	Jurrian van Iersel AS212635
AS213241	TECHIT.BE SRL TECHIT
AS263152	MIGO TELECOM AS263152
AS271253	LINK BRASIL TELECOMUNICACOES LTDA AS271253

Routing changes

Last 30 days

2026-10-04 04:59 UTC	Neighbour gone	AS31027	peer
2026-10-04 04:59 UTC	Neighbour gone	AS13194	upstream
2026-10-04 04:59 UTC	Neighbour gone	AS7195	upstream
2026-10-04 04:59 UTC	Neighbour gone	AS6204	upstream
2026-10-04 04:59 UTC	Neighbour gone	AS3214	peer
2026-10-04 04:59 UTC	Relationship changed	AS9044	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS8298	upstream to peer
2026-10-04 04:59 UTC	New neighbour	AS6797	peer
2026-10-04 04:59 UTC	Relationship changed	AS6777	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS61049	upstream to peer
2026-10-04 04:59 UTC	New neighbour	AS6057	peer
2026-10-04 04:59 UTC	Relationship changed	AS56655	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS5405	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS50673	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS50629	upstream to peer
2026-10-04 04:59 UTC	New neighbour	AS49559	peer
2026-10-04 04:59 UTC	Relationship changed	AS48362	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS47147	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS4455	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS42708	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS41327	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS39686	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS39351	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS39249	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS37497	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS37468	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS37100	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS35280	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS34927	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS34177	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS34019	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS33891	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS3216	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS30844	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS29632	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS29075	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS24961	upstream to peer
2026-10-04 04:59 UTC	New neighbour	AS22356	peer
2026-10-04 04:59 UTC	Relationship changed	AS21215	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS20766	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS20764	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 04:59 UTC	New neighbour	AS17557	peer
2026-10-04 04:59 UTC	Relationship changed	AS15958	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS15802	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS15576	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS14840	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS12779	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS1267	upstream to peer
2026-10-04 04:59 UTC	Relationship changed	AS1031	upstream to peer
2026-10-04 04:59 UTC	New prefix	80.85.160.0/24

WHOIS

aut-num:        AS25151
org:            ORG-CMH1-RIPE
as-name:        CYSO-AS
remarks:        AMS-IX
remarks:        NTT
remarks:        Arelion
remarks:        Colt
remarks:        Nawas
remarks:        CYSO-FRA
admin-c:        CYSO-RIPE
tech-c:         CYSO-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
remarks:        --
remarks:        Our current policy for accepting peers is either when you don't peer with the routeservers or you are part of the top 10 volume speakers . If you want to peer with us, mail peering@cyso.net
remarks:        We use maximum-prefix filters on all peers.
remarks:        --
mnt-by:         CYSO-MNT
created:        2002-09-16T13:40:41Z
last-modified:  2026-09-29T15:49:51Z
source:         RIPE
% 11 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/25151

const res = await fetch('https://ip-fd.net/api/v1/asn/25151', {
  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/25151', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/25151');
curl_setopt($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/25151", 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.

AS1299	Arelion Sweden AB TWELVE99
AS2914	NTT America, Inc. NTT-DATA-2914
AS3356	Level 3 Parent, LLC LEVEL3
AS6939	Hurricane Electric LLC HURRICANE
AS9002	RETN Limited RETN-AS
AS13030	Init7 (Switzerland) Ltd. INIT7
AS25091	IP-Max SA IP-Max
AS200020	Stichting NBIP-NaWas NBIP-AS

AS15535	Virtual Access Internet BV VIRTUALXS-AS
AS210728	Cyso Group B.V. CYSO-AS-DE