AS25151 CYSO
AS25151 is operated by CYSO and registered with RIPE NCC (NL) since 2002-08-09.
It announces 17 IPv4 and 3 IPv6 prefixes, 80% of them RPKI valid.
RIPE RIS sees 55 upstream and peer networks and 2 downstream networks next to it.
PeeringDB lists it as a Content network at 1 internet exchange and 2 facilities. Its peering policy is open.
| Name | CYSO |
|---|---|
| Registry (RIR) | RIPE NCC |
| Country | Netherlands (NL) |
| Delegated on | 2002-08-09 |
| Network type | Content, Europe |
| Peering policy | Open |
| Prefixes (IPv4 / IPv6) | 17 / 3 |
| RPKI valid | 80% (16 / 20) |
| Upstreams and peers | 55 |
| Downstream networks | 2 |
| Website | cyso.com |
Routing health
- AS25151 announces 17 IPv4 and 3 IPv6 prefixes.
- 16 of 20 announced prefixes are RPKI valid.
- 4 announced prefixes are not covered by a ROA of AS25151 (they may have none, or another network’s).
- 55 upstreams and peers, 2 downstream networks seen.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 20
- 2.57.56.0/24
- 37.46.136.0/21
- 37.46.138.0/24
- 37.46.140.0/24
- 37.72.138.0/24
- 45.134.223.0/24
- 62.129.139.0/24
- 62.129.149.0/24
- 80.85.160.0/23
- 81.24.0.0/20
- 85.158.200.0/21
- 93.94.224.0/21
- 109.235.72.0/21
- 130.193.5.0/24
- 185.54.112.0/22
- 185.123.55.0/24
- 193.33.220.0/24
- 2a01:518::/32
- 2a05:6cc0::/29
- 2001:678:c50::/48
Upstreams and peers 55
The networks RIPE RIS sees next to AS25151 in BGP paths, the most visible first.
Peering
Peering policy: Open. Suggested max-prefix limits: 50 IPv4, 25 IPv6. PeeringDB record
| Exchange | Ports | Speed | Route server |
|---|---|---|---|
| AMS-IX | 1 | 10G | Yes |
| Facility | City | Country |
|---|---|---|
| Equinix AM1/AM2 - Amsterdam, Luttenbergweg | Amsterdam | NL |
| Global Switch Amsterdam | Amsterdam | NL |
More about AS25151
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-12 17:14 UTC. The country is where the AS number was registered, not necessarily where the network operates.