Interconnection

AS51531 DECIX-MGMT-AS DE-CIX Management GmbH

Unclassified RIPE

Exchanges 16 16 active

Countries 7 most in Germany

Regions 3

Largest fabric 1,078 DE-CIX Frankfurt

Recorded presence

Internet exchanges

recorded

Internet exchanges where Packet Clearing House has a port recorded for AS51531, 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 10 North America 5 Asia-Pacific 1

Exchange	Location	Their address	Policy	Member ports
DE-CIX Frankfurt	Frankfurt, Germany	80.81.194.110	Selective	1,078
DE-CIX New York	New York, United States	206.82.104.216	—	285
DE-CIX Dusseldorf	Düsseldorf, Germany	185.1.170.110	Selective	227
DE-CIX Madrid	Madrid, Spain	185.1.192.210	Selective	227
DE-CIX Munich	Munich, Germany	185.1.208.110	Selective	211
DE-CIX Hamburg	Hamburg, Germany	185.1.210.116	Selective	196
DE-CIX Jakarta	Jakarta, Indonesia	49.213.56.110	Selective	181
DE-CIX Dallas	Dallas, United States	206.53.202.116	—	176
DE-CIX Marseille	Marseille, France	185.1.47.110	Selective	113
DE-CIX Chicago	Chicago, United States	149.112.11.110	Selective	83
DE-CIX Istanbul	Istanbul, Turkey	185.1.48.110	Selective	69
DE-CIX Lisbon	Lisbon, Portugal	185.1.131.110	Selective	63
DE-CIX Barcelona	Barcelona, Spain	185.1.119.110	Selective	49
DE-CIX Phoenix	Phoenix, United States	149.112.27.110	Selective	41
DE-CIX Richmond	Richmond, United States	206.53.137.110	Selective	23
RUHR-CIX	Ruhr, Germany	185.1.197.110	Selective	7

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 2026-10-11 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,346 exchanges and 98,138 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.