AS6686 — ATT-GCH-VOI-SF-AS VoIP platform - ex Concert

AS6686 announces 1 IPv4 prefixes covering 256 addresses and 0 IPv6 prefixes.

About this network

ATT-GCH-VOI-SF-AS is one of a pair of small AT&T Global Network Services autonomous systems carrying a VoIP platform, this one anchored in San Francisco. The registrant is AT&T Global Network Services Nederland B.V., the Dutch entity through which AT&T holds much of this legacy RIPE space.

What it's used for

• A single /24 of infrastructure address space for a voice-over-IP platform — not customer or subscriber addressing.
• Its sibling AS, AS6688, carries the equivalent Los Angeles platform on the adjacent /24.

Notable

• The RIPE description records the platform as ex-Concert. Concert was the global joint venture between AT&T and BT, announced in 1998 and unwound in 2002; the network assets were divided between the two parents, and AT&T's share still shows up in registry data under handles like this one.
• This is a carrier platform AS, not an eyeball or transit network. Its address footprint is tiny by design — a service platform needs a handful of addresses, not a subscriber pool.

Interesting

• The pairing of two nearly identical ASNs (6686 / 6688) with two adjacent /24s on two US coasts is a classic redundancy layout: the same service, deliberately split so that neither site is a single point of failure.

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

Announced prefixes

• 193.41.108.0/24

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-BUBIX, AS-IGNEMEA.