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AS25151

Cyso Group B.V.

RIPE NCC NL active Announced
More ASNs in the Netherlands →
Organization
Cyso Group B.V.
CYSO-AS
Registered
Aug 09, 2002
24 years ago
IPv4 Prefixes
15
15,872 addresses
IPv6 Prefixes
3
589,825 × /48
BGP Neighbours
104
53 upstream/peer · 2 downstream · 50 collector-only

Registration

AS Number AS25151 AS Name CYSO-AS Organization Cyso Group B.V. Organization ID ORG-CMH1-RIPE Address Wognumsebuurt 3, 1817 BH, Alkmaar, NETHERLANDS Country Netherlands (NL) Registry RIPE NCC Allocated Aug 09, 2002 Record Created Sep 16, 2002 Last Updated Sep 29, 2026 Status
active
WHOIS Server whois.ripe.net AS Description CYSO-AS - Cyso Group B.V., NL Remarks AMS-IX, NTT, Arelion, Colt, Nawas, CYSO-FRA, --, 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 [email protected], We use maximum-prefix filters on all peers. Abuse Email [email protected] Abuse Phone +31 72 7513400

IPv4 Prefixes

15 prefixes · 15,872 addresses Routing data as of 2026-10-07 08:00 UTC

PrefixRangeAddresses
2.57.56.0/242.57.56.0 – 2.57.56.255256
37.46.136.0/2137.46.136.0 – 37.46.143.2552,048
37.72.138.0/2437.72.138.0 – 37.72.138.255256
45.134.223.0/2445.134.223.0 – 45.134.223.255256
62.129.139.0/2462.129.139.0 – 62.129.139.255256
62.129.149.0/2462.129.149.0 – 62.129.149.255256
80.85.160.0/2380.85.160.0 – 80.85.161.255512
81.24.0.0/2081.24.0.0 – 81.24.15.2554,096
85.158.200.0/2185.158.200.0 – 85.158.207.2552,048
93.94.224.0/2193.94.224.0 – 93.94.231.2552,048
109.235.72.0/21109.235.72.0 – 109.235.79.2552,048
130.193.5.0/24130.193.5.0 – 130.193.5.255256
185.54.112.0/22185.54.112.0 – 185.54.115.2551,024
185.123.55.0/24185.123.55.0 – 185.123.55.255256
193.33.220.0/24193.33.220.0 – 193.33.220.255256

IPv6 Prefixes

3 prefixes · 589,825 × /48 Routing data as of 2026-10-07 08:00 UTC

PrefixAddresses
2001:678:c50::/48280
2a01:518::/32296
2a05:6cc0::/29299

BGP Neighbours

104 unique neighbours · 53 upstream/peer · 2 downstream · 50 collector-only. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries.

Upstream & peer side (53)

Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers.

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS3356LEVEL3 - Level 3 Parent, LLC2591,91693
AS1299TWELVE99 Arelion Sweden AB186750154
AS200020NBIP-AS Stichting NBIP-NaWas1261690
AS2914NTT-DATA-2914 - NTT America, Inc.11550292
AS6939HURRICANE - Hurricane Electric LLC1000215
AS13030INIT7 Init7 (Switzerland) Ltd.1811818
AS9002RETN-AS RETN Limited14033
AS25091IP-Max IP-Max SA137815
AS34019HIVANE Hivane Association114518
AS6777AMS-IX-RS Amsterdam Internet Exchange B.V.10473
AS33891CORE-BACKBONE Core-Backbone GmbH9406
AS5405INTERDOTLINK Inter.link GmbH8269
AS8298IPNG IPng Networks GmbH8309
AS37497Network Platforms (PTY) LTD - Network Platforms (PTY) LTD8340
AS50673Serverius-as Serverius Holding B.V.8266
AS35280F5 F5 Networks SARL7266
AS6057AS6057 - Administracion Nacional de Telecomunicaciones6186
AS14840AS14840 - BR.Digital Telecom67515
AS20764RASCOM-AS CJSC RASCOM6246
AS24961MYLOC-AS WIIT AG6186
AS29632NASSIST-AS Netassist International EOOD609
AS34177CELESTE-AS Celeste SAS6303
AS34927iFog-GmbH iFog GmbH6276
AS39351ESAB-AS 31173 Services AB6306
AS41327FIBERTELECOM-AS Fiber Telecom S.p.A.6300
AS48362TKSWF-AS Stadtwerke Feldkirch66012
AS12779ITGATE IT.Gate S.p.A.56912
AS47147AS-ANX Anexia Cloud Solutions GmbH5453
AS1267ASN-WINDTRE WIND TRE S.P.A.4230
AS3216SOVAM-AS PJSC "Vimpelcom"4180
AS8218NEO-ASN Zayo Infrastructure France SA410621
AS15576NTS NTS workspace AG4163
AS15802DU-AS1 Emirates Integrated Telecommunications Company PJSC4170
AS29075IELO IELO-LIAZO SERVICES SAS4103
AS37468Angola Cables - Angola Cables4183
AS42708GLESYS Glesys AB4183
AS50629LWLCOM LWLcom GmbH406
AS1764NEXTLAYER-AS Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH393
AS4455BSO IX Reach Ltd3153
AS6663TTI-NET Euroweb Romania S.R.L.393
AS6797GLOBALCONNECT-NET GlobalConnect AB3306
AS39686AS-EUROFIBER Eurofiber Nederland BV393
AS61049EXASCALE Exascale Ltd3153
AS1031PEER1-1031 - PEER 1031 LLC290
AS9044SOLNET BSE Software GmbH2184
AS20766GITOYEN-MAIN-AS Association "Gitoyen"290
AS21215UGNI UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd290
AS22356AS22356 - Durand do Brasil Ltda203
AS30844LIQUID-AS Liquid Telecommunications Ltd290
AS37100SEACOM Limited - SEACOM Limited290
AS39249KICUA-AS Netassist International EOOD203
AS49559IPT-1-IX A-Systems Sp. z o.o.290
AS56655GIGAHOST Gigahost AS280

Downstream side (2)

Networks seen to the right of this AS in BGP paths — networks whose routes it carries, typically its customers (downstreams).

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS15535VIRTUALXS-AS Virtual Access Internet BV2643390
AS210728CYSO-AS-DE Cyso Group B.V.421050

Collector-only (50)

Networks seen to the left of this AS only when they peer directly with a RIPE RIS route collector, so the adjacency may be an artefact of that peering; many of them also appear on the downstream side.

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS1103SURFNET-NL SURF B.V.4173
AS1140SIDN Stichting Internet Domeinregistratie Nederland4173
AS1828UNITAS - Unitas Global4173
AS12637SEEWEB SEEWEB s.r.l.4173
AS12859NL-BIT BIT BV4176
AS12969Vodafone_Iceland Ljosleidarinn ehf4170
AS14907WIKIMEDIA - Wikimedia Foundation Inc.4173
AS15605CONNESI Connesi s.p.a.4173
AS18106VIEWQWEST-SG-AP - Viewqwest Pte Ltd4173
AS24482SGGS-AS-AP - SG.GS416933
AS25160VORBOSS Vorboss Limited4366
AS28917Fiord-AS Fiord Networks, UAB4176
AS39122BLACKNIGHT-AS Blacknight Internet Solutions Limited4173
AS48185team_blue team.blue NV4519
AS50763MCKAYCOM Robert McKay4173
AS51088A2B A2B IP B.V.4180
AS51873AS-ARCADE Arcade Solutions AG4173
AS199524GCORE G-Core Labs S.A.4173
AS212635AS212635 Jurrian van Iersel4173
AS271253AS271253 - LINK BRASIL TELECOMUNICACOES LTDA4163
AS559Switch SWITCH3153
AS3333RIPE-NCC-AS Reseaux IP Europeens Network Coordination Centre (RIPE NCC)393
AS13237LAMBDANET-AS euNetworks GmbH3150
AS14630INVESCO - Invesco Group Services, Inc.3150
AS15547NETPLUS netplus.ch SA3183
AS20932SIG-ST Services Industriels de Geneve3153
AS25220GLOBALNOC-AS equada network GmbH3153
AS29140HOSTSERVER-AS Hostserver GmbH393
AS34288AS34288 Kantonsschule Zug393
AS36236NETACTUATE - NetActuate, Inc393
AS37721Virtual Technologies & Solutions - Virtual Technologies & Solutions3153
AS42541FIBERBY Fiberby ApS3153
AS44901belcloud Belcloud LTD3153
AS45489SLT-GLOBAL - Sri Lanka Telecom PLC, GLobal Peering3153
AS48919UA-CITY-AS UACITY Ltd.393
AS49544i3Dnet i3D.net B.V3306
AS49605DTS-AS Digital Telecommunication Services S.r.l.393
AS50300CUSTDC CustodianDC Limited393
AS51184FONIRA Fonira Telekom GmbH3186
AS56987AS-ABACLOUDA ABACLOUDA SAS393
AS61573AS61573 - IP TELECOM393
AS198150SIACOM-AS SIACOM JSC3153
AS199938NETZWERGE Netzwerge GmbH3153
AS212483level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD3306
AS8529OMANTEL-AS Zain Omantel International FZ-LLC206
AS17639CONVERGE-AS - Converge ICT Solutions Inc.203
AS51185MAINSTREAMING-AS MainStreaming SpA290
AS213241TECHIT TECHIT.BE SRL203
AS263152AS263152 - MIGO TELECOM290
AS15535VIRTUALXS-AS Virtual Access Internet BV110

Raw RDAP Response

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  "startAutnum": 25151,
  "endAutnum": 25151,
  "name": "CYSO-AS",
  "status": [
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          "objectClassName": "entity"
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  ],
  "remarks": [
    {
      "description": [
        "AMS-IX",
        "NTT",
        "Arelion",
        "Colt",
        "Nawas",
        "CYSO-FRA",
        "--",
        "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 [email protected]",
        "We use maximum-prefix filters on all peers."
      ]
    }
  ],
  "links": [
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      "rel": "rdap-up",
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      "type": "application/rdap+json"
    },
    {
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    {
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      "type": "application/rdap+json"
    },
    {
      "value": "http://www.ripe.net/data-tools/support/documentation/terms",
      "rel": "copyright",
      "href": "http://www.ripe.net/data-tools/support/documentation/terms"
    }
  ],
  "events": [
    {
      "eventAction": "registration",
      "eventDate": "2002-09-16T13:40:41Z"
    },
    {
      "eventAction": "last changed",
      "eventDate": "2026-09-29T15:49:51Z"
    }
  ],
  "rdapConformance": [
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    "rirSearch1",
    "autnums",
    "cidr0",
    "rdap_level_0",
    "nro_rdap_profile_0",
    "redacted"
  ],
  "notices": [
    {
      "title": "Filtered",
      "description": [
        "This output has been filtered."
      ]
    },
    {
      "title": "Whois Inaccuracy Reporting",
      "description": [
        "If you see inaccuracies in the results, please visit:"
      ],
      "links": [
        {
          "value": "https://rdap.db.ripe.net/autnum/25151",
          "rel": "inaccuracy-report",
          "href": "https://www.ripe.net/contact-form?topic=ripe_dbm&show_form=true",
          "type": "text/html"
        }
      ]
    },
    {
      "title": "Source",
      "description": [
        "Objects returned came from source",
        "RIPE"
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    },
    {
      "title": "Terms and Conditions",
      "description": [
        "This is the RIPE Database query service. The objects are in RDAP format."
      ],
      "links": [
        {
          "value": "https://rdap.db.ripe.net/autnum/25151",
          "rel": "terms-of-service",
          "href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
          "type": "application/pdf"
        }
      ]
    }
  ],
  "port43": "whois.ripe.net",
  "objectClassName": "autnum",
  "redacted": [
    {
      "name": {
        "description": "Personal e-mail information"
      },
      "reason": {
        "description": "Personal data"
      },
      "prePath": "$.entities[?(@.handle=='CYSO-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "method": "removal"
    },
    {
      "name": {
        "description": "Personal e-mail information"
      },
      "reason": {
        "description": "Personal data"
      },
      "prePath": "$.entities[?(@.handle=='ORG-CMH1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "method": "removal"
    },
    {
      "name": {
        "description": "Personal e-mail information"
      },
      "reason": {
        "description": "Personal data"
      },
      "prePath": "$.entities[?(@.handle=='CYSO-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "method": "removal"
    }
  ]
}

Contact details of private individuals are redacted.