Autonomous system
AS211023 DUMONT-SYSTEMS
Unclassified RIPE
Summary
KStA Medien Business Services
media business ipv6
The AS handle DUMONT-SYSTEMS is held by KStA Medien Business Services GmbH & Co. KG.
What it's used for
- The space carries a single IPv6 prefix,
2001:678:fcc::/48, with no announced IPv4 addresses. - The inventory consists of 1 IPv6 prefix and 0 IPv4 prefixes, observed against 1 routing neighbour, indicating a small-scale internal or corporate network rather than a transit or access provider.
- Traffic from this AS represents the internal network infrastructure of a German regional media publisher, supporting editorial, administrative, and digital business operations for the Kölner Stadt-Anzeiger.
Notable
- The registry holder is KStA Medien Business Services Verwaltungs GmbH t/a KStA Medien Business Services GmbH & Co. KG, which aligns with the AS handle
DUMONT-SYSTEMSreflecting the company's historical name before rebranding. - The operator was formerly known as DuMont Systems GmbH & Co. KG, a name change that occurred as part of the broader consolidation of DuMont's media assets under the Kölner Stadt-Anzeiger Medien umbrella.
- The address inventory is minimal, consisting solely of one IPv6 /48 block, which is typical for a corporate entity that does not require large-scale public IP address space.
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 |
|---|---|---|
| AS8422 | NetCologne Gesellschaft fur Telekommunikation mbH | 37 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 0 prefixes · 0 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 1 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS211023- Registry name
- DuMont-Systems
- Registrant
- lir-de-dumont-1-MNT
- Abuse contact
- andre.duchscherer@dumont.de
- Registered
- 2021-07-16
- Last changed
- 2021-07-16
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS211023
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS211023
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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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