Cyso Group B.V.
AS25151 is Cyso Group B.V. (cyso.com). It announces 14,848 IPv4 addresses in 15 prefixes, and 3 IPv6 prefixes.
The Netherlands· RIPE· allocated 2002-08-09· hosting
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- The Netherlands14,848 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- CYSO-AS
- name
- Cyso Group B.V.
- org
- ORG-CMH1-RIPE
- org name
- Cyso Group B.V.
- org address
- Wognumsebuurt 3, 1817 BH, Alkmaar, NETHERLANDS
- org country
- NL
- country
- NL
- source
- ripe
- status
- ASSIGNED
- created
- 2002-09-16
- updated
- 2026-09-29
- 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 peering@cyso.net / We use maximum-prefix filters on all peers.
- maintainer
- RIPE-NCC-END-MNT|CYSO-MNT
- abuse name
- Cyso Hosting B.V. Technical Role Account
- abuse email
- abuse@cyso.net
- abuse phone
- +31 72 7513401
- abuse kind
- role
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- VPN IP140.09%
- dataimpulse0.01%
- floppydata0.01%
- None here
- None here
- None here
- Hosting IP7,16848.28%
- None here
- None here
- None here
- SSH IP2841.91%
- SMTP IP1390.94%
- 0.48%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2.57.56.0/24 | The Netherlands | valid | 17 | 2026-10-02 |
| 37.46.136.0/21 | The Netherlands | valid | 17 | 2026-10-02 |
| 37.72.138.0/24 | The Netherlands | not found | 17 | 2026-10-02 |
| 45.134.223.0/24 | The Netherlands | valid | 17 | 2026-10-02 |
| 62.129.139.0/24 | The Netherlands | not found | 17 | 2026-10-02 |
| 62.129.149.0/24 | The Netherlands | not found | 17 | 2026-10-02 |
| 80.85.160.0/23 | The Netherlands | valid | 17 | 2026-10-02 |
| 81.24.0.0/20 | The Netherlands | valid | 17 | 2026-10-02 |
| 85.158.200.0/21 | The Netherlands | valid | 17 | 2026-10-02 |
| 93.94.224.0/21 | The Netherlands | valid | 17 | 2026-10-02 |
| 109.235.72.0/21 | The Netherlands | valid | 17 | 2026-10-02 |
| 130.193.5.0/24 | The Netherlands | valid | 17 | 2026-10-02 |
| 185.54.112.0/22 | The Netherlands | valid | 17 | 2026-10-02 |
| 185.123.55.0/24 | The Netherlands | not found | 17 | 2026-10-02 |
| 193.33.220.0/24 | The Netherlands | valid | 17 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2001:678:c50::/48 | The Netherlands | valid | 20 | 2026-10-02 |
| 2a01:518::/32 | The Netherlands | valid | 20 | 2026-10-02 |
| 2a05:6cc0::/29 | The Netherlands | valid | 20 | 2026-10-02 |
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