Stichting Cosis
Cluster stats
| Netblocks | 22 |
| All fragments | 7,834 blocks across 1,527 clusters |
| Cluster ID | 192541002 |
| Registry | RIPE |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | unresolved |
| Shared handles | clustered on 6 shared RIR contact/maintainer handles |
| Registry names | 2 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
IP Ranges (22)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 157.97.96.0/24 | Stichting Cosis | RIPE | LEGACY | ● high |
| 80.242.244.24/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 195.85.169.88/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 212.178.129.216/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 213.34.16.148/30 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 213.34.17.236/30 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 217.100.168.24/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 217.100.174.24/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 217.100.174.72/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 217.100.174.80/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 217.100.182.136/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 217.100.182.208/29 | STICHTING_COSIS | RIPE | ASSIGNED PA | ● low |
| 2001:41f0:1879::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:487b::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:589b::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:58f0::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:590c::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:6ec4::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:89d1::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:8a11::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:8b76::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
| 2001:41f0:96a9::/48 | STICHTING_COSIS | RIPE | ASSIGNED | ● low |
Network trust
what's this?
RPKI hygiene: A
how networks compare →
95.5%
of checked blocks have valid RPKI ROA coverage
(21 of 22)
Possible discrepancies (10)
These blocks are registered to Stichting Cosis but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 2001:41f0:96a9::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:89d1::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:487b::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:589b::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:8a11::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:58f0::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:8b76::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:590c::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:1879::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
| 2001:41f0:6ec4::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
NIC Handles
DUMY-RIPE
DUMY-RIPE
MNT-DUOCAST
ORG-SC250-RIPE
RIPE-NCC-LEGACY-MNT
ZIGGO-AUTOREG1