de Groot Bastiaan

Data as of 2026-09-27
BGP inherited
This organisation
Netblocks8
IPv6 2 prefixes (largest 2001:41f0:6ff8::/48)
Registered in France (4) · Netherlands (2)
Also registered under this name 19 netblocks across 6 separate records
Record ID245673163
RegistryRIPE
Customerssee who runs inside this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 7 shared RIR contact/maintainer handles
Registry names 4 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (8)

⬇ export CSV
CIDR Org name Registry Status Confidence
51.75.166.224/30 de Groot Bastiaan RIPE LEGACY ● high
51.89.34.164/30 de Groot Bastiaan RIPE LEGACY ● high
51.195.54.76/30 de Groot Bastiaan RIPE LEGACY ● high
54.37.192.180/30 de Groot Bastiaan RIPE LEGACY ● high
81.18.241.112/29 de_groot RIPE ASSIGNED PA ● low
217.100.178.152/30 DE_GROOT_RODEN_BV RIPE ASSIGNED PA ● low
2001:41f0:6ff8::/48 DE_GROOT_ZONWERING RIPE ASSIGNED ● low
2001:41f0:8b35::/48 DE_GROOT_RODEN_BV RIPE ASSIGNED ● low

IPv6 ranges (2)

CIDR
2001:41f0:6ff8::/48
2001:41f0:8b35::/48

Footprint over time

14 weekly snapshots · JSON
8 +1 netblocks since 2026-07-05
2026-07-05 peak 8 2026-09-27

Network trust

what's this?
RPKI hygiene: A how networks compare →
100.0% of checked blocks have valid RPKI ROA coverage (8 of 8)
Possible discrepancies (2)

These blocks are registered to de Groot Bastiaan 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.

2001:41f0:8b35::/48 /48 authorized for AS33915 — Vodafone Libertel B.V.
2001:41f0:6ff8::/48 /48 authorized for AS33915 — Vodafone Libertel B.V.

NIC Handles

DUMY-RIPE DUMY-RIPE ORG-AD271-RIPE ORG-DGB11-RIPE OVH-MNT ZIGGO-AUTOREG1 qore-mnt