AS5623 — ATT-CH-0A AT&T Global Network Services Nederland B.V.

AS5623 announces 1 IPv4 prefixes covering 256 addresses and 0 IPv6 prefixes.

About this network

ATT-CH-0A is one of AT&T's EMEA autonomous systems, registered to AT&T Global Network Services Nederland B.V. in The Hague. The RIPE description reads "ATT-EMEA Autonomous System (dr6348)" — an internal routing-domain reference rather than a customer-facing name.

What it's used for

Enterprise network services in Europe. AT&T Global Network Services delivers managed connectivity, MPLS/VPN and internet access to multinational corporate customers; this AS is a small piece of that estate, announcing a single /24.

Notable

At 256 addresses this is an operational fragment of a global carrier, not a backbone. Treat it as corporate/managed-service space: what sits behind it is business infrastructure, and its size tells you nothing about AT&T's actual footprint, which is spread across many separate autonomous systems.

Interesting

The dr6348 tag in the description is the kind of internal identifier that occasionally escapes into public registry data. It is a small demonstration of why AS descriptions are a starting point for identification, never the whole answer — the useful information here is the org record, not the name.

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

Announced prefixes

• 193.41.110.0/24

Upstream networks

• AS2686 AT&T Enterprises, LLC

Adjacent networks

• AS2686 AT&T Enterprises, LLC

Routing security

• RPKI: 0 valid, 0 invalid and 1 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 2 route objects.
• Listed in as-sets: AS-ATTAMSTERDAM, AS-ATTUKEMEA, AS-ATTVAS, AS-IGNEMEA.