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AS210728

Cyso Group B.V.

RIPE NCC NL active Announced
More ASNs in the Netherlands →
Organization
Cyso Group B.V.
CYSO-AS-DE
Registered
Sep 22, 2021
5 years ago
IPv4 Prefixes
3
768 addresses
IPv6 Prefixes
1
65,536 × /48
BGP Neighbours
114
54 upstream/peer · 1 downstream · 60 collector-only

Registration

AS Number AS210728 AS Name CYSO-AS-DE Organization Cyso Group B.V. Organization ID ORG-CGB5-RIPE Address Wognumsebuurt 3, 1817 BH, Alkmaar, NETHERLANDS Country Netherlands (NL) Registry RIPE NCC Allocated Sep 22, 2021 Record Created Sep 22, 2021 Last Updated Apr 19, 2023 Status
active
WHOIS Server whois.ripe.net AS Description CYSO-AS-DE CYSO-AMS, NL Remarks CYSO-AMS, LEVEL3, DE-CIX, FUGA Abuse Email [email protected]

IPv4 Prefixes

3 prefixes · 768 addresses Routing data as of 2026-10-11 16:00 UTC

PrefixRangeAddresses
77.246.243.0/2477.246.243.0 – 77.246.243.255256
194.26.103.0/24194.26.103.0 – 194.26.103.255256
213.173.39.0/24213.173.39.0 – 213.173.39.255256

IPv6 Prefixes

1 prefix · 65,536 × /48 Routing data as of 2026-10-11 16:00 UTC

PrefixAddresses
2a11:2440::/32296

BGP Neighbours

114 unique neighbours · 54 upstream/peer · 1 downstream · 60 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 (54)

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, LLC372711227
AS6939HURRICANE - Hurricane Electric LLC11953137
AS25151CYSO-AS Cyso Group B.V.461130
AS33891CORE-BACKBONE Core-Backbone GmbH13128
AS35280F5 F5 Networks SARL11206
AS34019HIVANE Hivane Association92510
AS34927iFog-GmbH iFog GmbH9136
AS5405INTERDOTLINK Inter.link GmbH8184
AS35625EUROFIBER-FRANCE Eurofiber France SAS8154
AS25091IP-Max IP-Max SA7256
AS34549MEER-AS meerfarbig GmbH & Co. KG7152
AS6057AS6057 - Administracion Nacional de Telecomunicaciones6104
AS8218NEO-ASN Zayo Infrastructure France SA64016
AS8298IPNG IPng Networks GmbH655
AS8758IWAY Iway AG6156
AS12859NL-BIT BIT BV665
AS14840AS14840 - BR.Digital Telecom62510
AS20764RASCOM-AS CJSC RASCOM6104
AS24961MYLOC-AS WIIT AG6104
AS29691NINE Nine Internet Solutions AG6104
AS39351ESAB-AS 31173 Services AB6104
AS48362TKSWF-AS Stadtwerke Feldkirch6208
AS4230AS4230 - CLARO S.A.592
AS12779ITGATE IT.Gate S.p.A.5258
AS20562OPEN-PEERING-AS Broadband Hosting B.V.544
AS29632NASSIST-AS Netassist International EOOD505
AS34177CELESTE-AS Celeste SAS5102
AS37468Angola Cables - Angola Cables5102
AS41327FIBERTELECOM-AS Fiber Telecom S.p.A.5102
AS47147AS-ANX Anexia Cloud Solutions GmbH5204
AS1267ASN-WINDTRE WIND TRE S.P.A.380
AS1764NEXTLAYER-AS Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH352
AS1836GREEN green.ch AG3102
AS6663TTI-NET Euroweb Romania S.R.L.351
AS6695DECIX-AS DE-CIX Management GmbH352
AS6797GLOBALCONNECT-NET GlobalConnect AB3104
AS12577MMC-AT-AS MMC GmbH352
AS28716RETELIT-AS Retelit Digital Services S.p.A.352
AS60171AFRIX-AS AFR-IX TELECOM S.A.341
AS137409GSLNETWORKS-AS-AP - GSL Networks Pty LTD352
AS205103TELEGRAPH-AS Telegraph42 Management GmbH341
AS212024RISSON Marc Schmitt352
AS4455BSO IX Reach Ltd250
AS15958CETIN_doo_AS CETIN Ltd. Belgrade250
AS20485TRANSTELECOM Joint Stock Company TransTeleCom250
AS24889MONZOON-AS Monzoon Networks AG202
AS29208QUANTCOM-AS Quantcom, a.s.250
AS30781JAGUAR-AS Free Pro SAS202
AS37100SEACOM Limited - SEACOM Limited250
AS39249KICUA-AS Netassist International EOOD202
AS6204ZET-NET TMRC GROUP SRL120
AS7713telkomnet-as-ap - PT Telekomunikasi Indonesia120
AS20326TERASWITCH - TeraSwitch Networks Inc.120
AS22356AS22356 - Durand do Brasil Ltda101

Downstream side (1)

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

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS44694FUGA_NL_1 Cyso Group B.V.347681340

Collector-only (60)

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
AS553BELWUE Universitaet Stuttgart352
AS559Switch SWITCH352
AS3212TELEMACH Telemach Slovenija d.o.o.352
AS3214XTOM xTom GmbH3102
AS6424EDGOO EDGOO NETWORKS UNIPESSOAL LDA352
AS8529OMANTEL-AS Zain Omantel International FZ-LLC3104
AS8888XTOM xTom Pty Ltd352
AS15547NETPLUS netplus.ch SA3106
AS20932SIG-ST Services Industriels de Geneve352
AS24482SGGS-AS-AP - SG.GS35122
AS25160VORBOSS Vorboss Limited364
AS25220GLOBALNOC-AS equada network GmbH352
AS29075IELO IELO-LIAZO SERVICES SAS352
AS29140HOSTSERVER-AS Hostserver GmbH352
AS31510IKB-AS Innsbrucker Kommunalbetriebe AG352
AS34288AS34288 Kantonsschule Zug352
AS35360GARGUNET Frederic Gargula352
AS35710WEBERCLOUD weber.digital GmbH3104
AS36236NETACTUATE - NetActuate, Inc352
AS37721Virtual Technologies & Solutions - Virtual Technologies & Solutions352
AS42541FIBERBY Fiberby ApS352
AS44901belcloud Belcloud LTD352
AS45489SLT-GLOBAL - Sri Lanka Telecom PLC, GLobal Peering352
AS47692NESSUS Nessus GmbH3104
AS48919UA-CITY-AS UACITY Ltd.352
AS49544i3Dnet i3D.net B.V3104
AS50629LWLCOM LWLcom GmbH332
AS51184FONIRA Fonira Telekom GmbH3104
AS56987AS-ABACLOUDA ABACLOUDA SAS352
AS58057SECUREBIT Securebit AG354
AS58299OPENFACTORY-AS Openfactory GmbH352
AS61573AS61573 - IP TELECOM352
AS64475FREIFUNK-FRANKFURT Freifunk Frankfurt am Main e.V.352
AS198150SIACOM-AS SIACOM JSC352
AS198385AlpineDC AlpineDC SA352
AS199524GCORE G-Core Labs S.A.352
AS199938NETZWERGE Netzwerge GmbH352
AS205112PHILUNET PHILUNET GmbH352
AS210937Showfom Xiufeng Guo352
AS212483level86 LEVEL EIGHTY-SIX COMMUNICATIONS LTD3104
AS213151CHRISELSEN Christian Elsen352
AS264479AS264479 - Turbozone Internet352
AS1828UNITAS - Unitas Global202
AS13237LAMBDANET-AS euNetworks GmbH250
AS14630INVESCO - Invesco Group Services, Inc.250
AS17639CONVERGE-AS - Converge ICT Solutions Inc.222
AS18106VIEWQWEST-SG-AP - Viewqwest Pte Ltd230
AS21412CGATES-AS UAB "Cgates"250
AS28917Fiord-AS Fiord Networks, UAB204
AS34800SBAG Securebit AG250
AS35598INETCOM INETCOM CARRIER LLC250
AS51185MAINSTREAMING-AS MainStreaming SpA202
AS56662EUTPNET Marcin Gondek202
AS57777MASSAR Jeroen Massar251
AS142271DOUBLESQUARE-AS-AP - EWS DS Networks Inc250
AS198249OPSONE Ops One AG202
AS206356Freifunk-Essen Freifunk Essen e.V.250
AS209823ENKI-AS Enki Multimedia EURL202
AS213241TECHIT TECHIT.BE SRL202
AS44694FUGA_NL_1 Cyso Group B.V.121

Raw RDAP Response

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  "endAutnum": 210728,
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  ],
  "events": [
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      "eventDate": "2021-09-22T12:43:19Z"
    },
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      "eventAction": "last changed",
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        "If you see inaccuracies in the results, please visit:"
      ],
      "links": [
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      "description": [
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      ],
      "links": [
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  "redacted": [
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      "name": {
        "description": "Personal e-mail information"
      },
      "reason": {
        "description": "Personal data"
      },
      "prePath": "$.entities[?(@.handle=='CYSO-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "method": "removal"
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      "method": "removal"
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}

Contact details of private individuals are redacted.