Autonomous system
AS5419 CUCI
Unclassified RIPE
Summary
Cubic Circle B.V. (CuCi)
hosting legacy
CUCI is Cubic Circle B.V., a long-established Dutch internet company based in Simpelveld in the south of the Netherlands, known by its cuci.nl domain.
What it's used for
- Hosting, virtual servers, domains and mail for Dutch customers, plus the connectivity underneath them.
- A modest set of prefixes, announced through a small number of upstreams.
Notable
- Server-side address space: reverse DNS across the range is dominated by
*.cuci.nlhosting hosts rather than access lines, so traffic from it looks like hosted services rather than end users. - A small, independent provider holding an AS number in a range otherwise full of national carriers — a survivor of the mid-1990s wave of Dutch ISPs, many of whose peers were long ago absorbed into larger groups.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS49544 | i3D.net B.V | 303 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 1.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| NL | Netherlands | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS5419- Registry name
- CUCI
- Registrant
- CUCI
- Abuse contact
- abuse@cuci.nl
- Registered
- 1970-01-01
- Last changed
- 2016-04-14
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 5 valid, 0 with no ROA
- ROAs
- 9 authorising AS5419
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 9 naming AS5419
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,781 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere