Stichting Cosis

Data as of 2026-07-26
BGP inherited
Cluster stats
Netblocks22 · 336 IPv4 addresses
IPv6 10 prefixes (largest 2001:41f0:1879::/48)
Cluster ID213515442
RegistryRIPE
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
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 · report an issue

Footprint over time

6 weekly snapshots · JSON
22 0 netblocks since 2026-07-05
2026-07-05 peak 22 2026-07-26

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

IPv6 ranges (10)

CIDR
2001:41f0:1879::/48
2001:41f0:487b::/48
2001:41f0:589b::/48
2001:41f0:58f0::/48
2001:41f0:590c::/48
2001:41f0:6ec4::/48
2001:41f0:89d1::/48
2001:41f0:8a11::/48
2001:41f0:8b76::/48
2001:41f0:96a9::/48

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