RDAP / Whois lookup

Look up authoritative registration records for a domain, IP, network prefix or ASN. Subdomains are resolved to their registrable domain automatically.

AS25151

Record foundRIPE NCC

CYSO-AS

RDAP is structured authoritative registration data. Registration records and contacts do not establish current routing, device location or network safety.

Queried at10/23/2026, 03:14:06Local authoritative snapshot

ASN profile Network topology BGP routes

Resource type: Autonomous system
Registry: RIPE NCC
Registration country / region: Not provided by registry
Registration status: Active
Registered at: 9/16/2002, 13:40:41
Last changed: 9/29/2026, 15:49:51

Resource rangeAS25151 – AS25151Autonomous system

Resource records1ASN count

Public contacts7Published by the registry

Registry events2Authoritative change record

Authoritative registration details

Registry handle: AS25151
Name: CYSO-AS
Allocation type: Not provided by registry
Parent handle: Not provided by registry
Whois server: whois.ripe.net
Authoritative RDAP host: rdap.db.ripe.net

Address and number range

Resource range: AS25151 – AS25151
Address family: Not applicable
Resource records: Not applicable

Registration entities and contacts

Only public fields from the authoritative RDAP response are shown. Roles are assigned by the registry.

7 entities

Registrant

CYSO-MNTCYSO-MNT

Not provided by registry

AdministrativeTechnicalAbuse

Cyso Hosting B.V. Technical Role AccountCYSO-RIPE

abuse@cyso.net+31 72 7513400+31 72 7513401

Cyso Managed Hosting B.V. · Wognumsebuurt 3 · 1817 BH Alkmaar · The Netherlands

Registrant

Cyso Group B.V.ORG-CMH1-RIPE

+31 72 751 3400+31 72 751 3401

Wognumsebuurt 3 · 1817 BH · Alkmaar · NETHERLANDS

Registrant

ORG-NCC1-RIPERIPE-NCC-END-MNT

Not provided by registry

AdministrativeTechnical

Joost PijnakerPIJN1-RIPE

+31 72 751 3400

Wognumsebuurt 3

AdministrativeTechnical

Stanley WesterveldSCAW666-RIPE

+31 72 7513400

Cyso Hosting B.V. · Luttik Oudorp 11-13 · 1811 MT Alkmaar · The Netherlands

AdministrativeTechnical

Tjebbe de WinterTSW-RIPE

+31 72 7513400

Cyso Hosting B.V. · Wognumsebuurt 3 · 1817 BH Alkmaar · The Netherlands

Registration and change events

2 events

Event	Time (UTC)	Actor
Last changed	9/29/2026, 15:49:51	Not provided by registry
Registration	9/16/2002, 13:40:41	Not provided by registry

Terms and remarks

Registry notices are shown verbatim so their authoritative meaning is not altered.

5 notices

Registry noticeAMS-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 peering@cyso.net We use maximum-prefix filters on all peers.

FilteredThis output has been filtered.

Whois Inaccuracy ReportingIf you see inaccuracies in the results, please visit:

SourceObjects returned came from source RIPE

Terms and ConditionsThis is the RIPE Database query service. The objects are in RDAP format.

CHA.LA authoritative RDAP snapshotIANA Bootstrap only locates the responsible registration service. Data comes from the corresponding RIR or domain registry and is cached locally by query target.Authoritative source: RIPE NCC · rdap.db.ripe.net