AS number details


Cyso Group B.V.  ·

AS25151 – Cyso Group B.V.

Country Netherlands
Hosted domains 58,463
Number of IPs 16,384
ASN type Hosting
Allocated 20 years ago on Sep 16, 2002

IP Address Ranges

Netblock Company Num of IPs Cyso Group B.V. 2,048 Bitmaster Online B.V. 256 Cyso Group B.V. 1,024 Fuga b.v. 1,024 Ronald Pool is trading as Video en Media 512 HCB Media BV 256 Cyso Hosting B.V. 512 Cyso Group B.V. 2,048 Harlem Next B.V. 256 Bitmaster Online BV 256 Fuga b.v. 4,096 Cyso Group B.V. 2,048 Shared Hosting 256 Cyso Group B.V. 2,048
Netblock Company
2001:67c:1724::/48 HCB Media BV.
2a01:518::/32 Cyso Group B.V.
2a05:6cc0::/29 Fuga b.v.
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WHOIS Details

as-block:       AS24988 - AS25162
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2018-11-22T15:27:30Z
last-modified:  2018-11-22T15:27:30Z
source:         RIPE

aut-num:        AS25151
org:            ORG-CMH1-RIPE
as-name:        CYSO-AS
remarks:        AMS-ix route server
import:         from AS6777 accept ANY
export:         to AS6777 action community .= {6777:6777}; announce AS-CYSO
remarks:        NTT
import:         from AS2914 action pref=90; accept ANY
export:         to AS2914 announce AS-CYSO
remarks:        Telia
import:         from AS1299 action pref=90; accept ANY
export:         to AS1299 announce AS-CYSO
remarks:        Level3
import:         from AS3356 action pref=90; accept ANY
export:         to AS3356 announce AS-CYSO
remarks:        Nawas
import:         from AS200020 action pref=90; accept ANY
export:         to AS200020 announce AS-CYSO
remarks:        CYSO-FRA
import:         from AS210728 accept ANY
export:         to AS210728 announce ANY
admin-c:        CYSO-RIPE
tech-c:         CYSO-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
remarks:        --
remarks:        If you want to peer with us, mail
remarks:        We do not filter our peers unless they screw up.
remarks:        We use maximum-prefix filters on all peers.
remarks:        --
mnt-by:         CYSO-MNT
created:        2002-09-16T13:40:41Z
last-modified:  2022-05-10T15:12:16Z
source:         RIPE
abuse-c:        CYSO-RIPE
abuse-org:      ORG-CMH1-RIPE

organisation:   ORG-CMH1-RIPE
org-name:       Cyso Group B.V.
country:        NL
org-type:       LIR
address:        Wognumsebuurt 3
address:        1817 BH
address:        Alkmaar
address:        NETHERLANDS
phone:          +31 72 751 3400
fax-no:         +31 72 751 3401
admin-c:        CYSO-RIPE
admin-c:        SCAW666-RIPE
admin-c:        TSW-RIPE
abuse-c:        CYSO-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        CYSO-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         CYSO-MNT
created:        2005-01-13T06:11:10Z
last-modified:  2020-12-16T13:29:19Z
source:         RIPE

role:           Cyso Hosting B.V. Technical Role Account
address:        Cyso Managed Hosting B.V.
address:        Wognumsebuurt 3
address:        1817 BH Alkmaar
address:        The Netherlands
phone:          +31 72 7513400
fax-no:         +31 72 7513401
admin-c:        TSW-RIPE
admin-c:        SCAW666-RIPE
admin-c:        PIJN1-RIPE
tech-c:         TSW-RIPE
tech-c:         PIJN1-RIPE
tech-c:         SCAW666-RIPE
nic-hdl:        CYSO-RIPE
mnt-by:         CYSO-MNT
remarks:        --
remarks:        Abuse issues :
remarks:        Other technical issues :
remarks:        --
created:        2002-08-05T11:12:02Z
last-modified:  2019-11-04T12:45:28Z
source:         RIPE
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Hosted Domains

There are 58,463 domain names hosted across 829 IP addresses on this ASN.

IP Address Domain Domains on this IP 31,146 6,880 3,130 2,137 2,031 774 548 526 511 490 435 395 392 383 356 335 304 248 242 240 237 217 180 177 176 174 174 167 164 157 154 131 127 121 120 118 117 116 109 101 97 95 92 92 89 88 87 75 74 72

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity


There are 101 peers for this ASN.

Peers Name
AS1103 SURF B.V.
AS1140 Stichting Internet Domeinregistratie Nederland
AS12350 VTX Services SA
AS1239 Sprint
AS12779 IT.Gate S.p.A.
AS12859 BIT BV
AS1299 Telia Company AB
AS13030 Init7 (Switzerland) Ltd.
AS13237 euNetworks GmbH
AS137409 GSL Networks Pty LTD
AS13786 Seabras 1 USA, LLC
AS14061 DigitalOcean, LLC
AS140731 TOHU Public Internet
AS14630 Invesco Group Services, Inc.
AS14907 Wikimedia Foundation Inc.
AS15547 SA
AS15576 NTS workspace AG
AS17639 Converge ICT Solutions Inc.
AS18106 Viewqwest Pte Ltd
AS1828 Unitas Global LLC
AS199938 Netzwerge GmbH
AS200020 Stichting NBIP-NaWas
AS20495 We Dare B.V.
AS20766 Association Gitoyen
AS20932 Services Industriels de Geneve
AS24482 SG.GS
AS24961 myLoc managed IT AG
AS25091 IP-Max SA
AS25160 Vorboss Limited
AS25220 equada network GmbH
AS264479 Turbozone Internet
AS28917 Fiord Networks, UAB
AS2914 NTT America, Inc.
AS29140 Hostserver GmbH
AS29632 Netassist Limited
AS30781 Jaguar Network SAS
AS31019 Paulus M. Hoogsteder
AS31122 Digiweb ltd
AS31133 PJSC MegaFon
AS3214 xTom GmbH
AS3216 PJSC Vimpelcom
AS3223 Voxility LLP
AS3267 Federal State Institution Federal Scientific Research Institute for System Analysis of the Russian Academy of Sciences
AS328832 Network Platforms (PTY) LTD
AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
AS3356 Level 3 Parent, LLC
AS33891 Core-Backbone GmbH
AS34019 Hivane
AS34288 Kantonsschule Zug
AS34549 meerfarbig GmbH & Co. KG
AS34927 iFog GmbH
AS35320 Eurotranstelecom Ltd
AS35598 Inetcom LLC
AS37100 SEACOM Limited
AS37468 Angola Cables
AS37721 Virtual Technologies & Solutions
AS38880 Micron21 Datacentre Pty Ltd
AS39122 Blacknight Internet Solutions Limited
AS39351 31173 Services AB
AS42541 Fiberby ApS
AS42861 Foton Telecom CJSC
AS4455 IX Reach Ltd
AS47147 ANEXIA Internetdienstleistungs GmbH
AS48362 Stadtwerke Feldkirch
AS50300 CustodianDC Limited
AS50304 Blix Solutions AS
AS50629 LWLcom GmbH
AS50673 Serverius
AS51088 A2B IP B.V.
AS51184 Fonira Telekom GmbH
AS51185 Onecom Global Communications LTD
AS52320 GlobeNet Cabos Submarinos Colombia, S.A.S.
AS56655 TerraHost AS
AS5713 Telkom SA Ltd.
AS58511 Anycast Global Backbone
AS59890 Kabel-TV Lampert GmbH & Co KG
AS60501 Sirius Technology SRL
AS6233 xTom
AS6777 Amsterdam Internet Exchange B.V.
AS6939 Hurricane Electric LLC
AS7713 PT Telekomunikasi Indonesia
AS8218 Zayo Infrastructure France SA
AS8283 Netwerkvereniging Coloclue
AS8315 Sentia Netherlands BV
AS8447 A1 Telekom Austria AG
AS8758 Iway AG
AS9002 RETN Limited
AS9044 BSE Software GmbH
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There are 5 upstreams for this ASN.

upstreams Name
AS1239 Sprint
AS1299 Telia Company AB
AS200020 Stichting NBIP-NaWas
AS2914 NTT America, Inc.
AS3356 Level 3 Parent, LLC
Get all this data and more in JSON format using our ASN API Read More


There are no downstreams for this ASN.

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Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS25151 at robtex.

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