Stichting Deltares
Data as of 2026-07-26
GLEIF verified
Limited data: only 3 ranges found registered
under this exact name. This may not reflect the organisation's full internet footprint — many companies'
web and cloud infrastructure is hosted under a third-party provider's own registration rather than their own.
LEI
724500N79M3VBPI6WQ28
Registered name
Stichting Deltares
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 3 · 65,544 IPv4 addresses |
| IPv6 | 1 prefix (largest 2001:41f0:590d::/48) |
| Cluster ID | 213931998 |
| Registry | RIPE |
| Owner jurisdiction | NL |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 724500N79M3VBPI6WQ28 |
| Shared handles | clustered on 7 shared RIR contact/maintainer handles |
| Registry names | 2 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
IP Ranges (3)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 136.231.0.0/16 | Stichting Deltares | RIPE | LEGACY | ● high |
| 213.125.158.192/29 | STICHTING_DELTARES | RIPE | ASSIGNED PA | ● low |
| 2001:41f0:590d::/48 | STICHTING_DELTARES | RIPE | ASSIGNED | ● low |
IPv6 ranges (1)
| CIDR |
|---|
| 2001:41f0:590d::/48 |
Network trust
what's this?
RPKI hygiene: A
how networks compare →
100.0%
of checked blocks have valid RPKI ROA coverage
(3 of 3)
Possible discrepancies (1)
These blocks are registered to Stichting Deltares 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.
| 2001:41f0:590d::/48 /48 | authorized for AS33915 — Vodafone Libertel B.V. |
Routed via provider/NREN (1)
These blocks are cryptographically authorized for this organisation's national research & education network or transit provider — expected topology for an institution that routes through it, not a discrepancy.
| 136.231.0.0/16 /16 | routed via AS1103 — SURF (SURF B.V.) |
NIC Handles
DUMY-RIPE
DUMY-RIPE
ORG-SD114-RIPE
RIPE-NCC-LEGACY-MNT
SN-LIR-MNT
SURF-AUTO-MNT
ZIGGO-AUTOREG1