Interconnection

AS680 DFN Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

Unclassified RIPE Educational/Research

Exchanges 6 6 active

Countries 2 most in Germany

Regions 1

Largest fabric 1,076 DE-CIX Frankfurt

Recorded presence

Internet exchanges

recorded

Internet exchanges where Packet Clearing House has a port recorded for AS680, largest fabric first. An exchange is shared switching where networks interconnect directly rather than paying a transit provider, so turning up at one is a deliberate choice about how this network wants to be reached. Each name opens that exchange's page, with its peering LANs and everyone else on it.

Europe 6

Exchange	Location	Their address	Policy	Member ports
DE-CIX Frankfurt	Frankfurt, Germany	80.81.193.222	Selective	1,076
AMS-IX Amsterdam	Amsterdam, Netherlands	80.249.213.192	Selective	883
The Frys Internet Exchange	Frysian, Netherlands	2001:7f8:10f::2a8:356	Selective	339
DE-CIX Hamburg	Hamburg, Germany	185.1.210.118	Selective	196
Berlin Commercial Internet Exchange	Berlin, Germany	193.178.185.42	Selective	154
Megaport Dusseldorf IX	Düsseldorf, Germany	194.146.118.60	Selective	98

Recorded rather than inferred: an address on a peering LAN is at that exchange by definition. Member ports counts every participant at the exchange, not this network's ports, so read it as a size proxy. An absent exchange means PCH has no record of it, not that the network is not there. For the operator's own claims, see its PeeringDB record.

From the exchange directory collected 2026-10-26 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,347 exchanges and 97,624 recorded member ports, licensed CC BY-NC-SA 3.0.

PeeringDB is the better-known directory and is deliberately not the source here: its acceptable-use policy forbids the bulk storage this needs. The two answer different questions anyway. PeeringDB reports what an operator declares about itself; this reports what PCH has recorded.