AS211023 — DUMONT-SYSTEMS

AS211023 announces 0 IPv4 prefixes covering 0 addresses and 1 IPv6 prefixes.

About this network

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-SYSTEMS reflecting 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.

Announced prefixes

• 2001:678:fcc::/48

Upstream networks

• AS8422 NetCologne Gesellschaft fur Telekommunikation mbH

Adjacent networks

• AS8422 NetCologne Gesellschaft fur Telekommunikation mbH

Routing security

• RPKI: 0 valid, 0 invalid and 1 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 1 route objects.
• Listed in as-sets: AS-HURRICANEV6, AS-NETCOLOGNE, AS-RETN-ACTUAL-V6.