AS8741 — RATIOKONTAKT

Network type: hosting

AS8741 announces 2 IPv4 prefixes covering 73,728 addresses and 2 IPv6 prefixes.

About this network

ratiokontakt GmbH (ratiokontakt) — a managed-hosting and cloud provider from Bamberg, Germany, providing internet services since 1996 and running its own data centre in Nuremberg. Around 74,000 IPv4 addresses, dominated by a legacy 212.223.0.0/16, plus two IPv6 /32s.

What it's used for

• Managed servers, shared and dedicated hosting, email, domains and private/hybrid cloud for German business customers. Tens of thousands of hosted domains sit behind the space.
• The rDNS shows the operator's own core (ecore.net — a ratiokontakt brand, including its Frankfurt core routers and customer account portal) alongside hosted customer sites and remote-access gateways for managed-IT clients.

Notable

• A /16 is a large block for a company this size, and it is a legacy allocation: the netname records a 1998 registration, from the era when a German ISP could still ask for a Class B. Most of it carries no reverse DNS.
• Peering is at DE-CIX and the Nuremberg exchange with an open policy, but the AS has only a handful of transit neighbours — a content/hosting network's shape, not a carrier's.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 212.63.128.0/19
• 212.223.0.0/16
• 2a02:708::/32
• 2a12:7140::/32

Upstream networks

• AS33891 Core-Backbone GmbH
• AS8767 M-net Telekommunikations GmbH

Adjacent networks

• AS33891 Core-Backbone GmbH
• AS8767 M-net Telekommunikations GmbH

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• DE-CIX Dusseldorf — Düsseldorf, Germany
• DE-CIX Hamburg — Hamburg, Germany
• Berlin Commercial Internet Exchange — Berlin, Germany