Interconnection

AS33891 Core-Backbone GmbH

Hosting RIPE

Exchanges 25 25 active

Countries 14 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 AS33891, 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 22 North America 2 Asia-Pacific 1

Exchange	Location	Their address	Policy	Member ports
DE-CIX Frankfurt	Frankfurt, Germany	80.81.195.147	Selective	1,078
LINX LON1	London, United Kingdom	195.66.224.238	Selective	931
AMS-IX Amsterdam	Amsterdam, Netherlands	80.249.209.128	Case-by-case	882
Neutral Internet Exchange	Amsterdam, Netherlands	193.239.119.245	Selective	669
France-IX Paris	Paris, France	37.49.237.55	Selective	570
Equinix Internet Exchange Singapore	Singapore, Singapore	27.111.228.116	Selective	496
TPIX - Internet Exchange	Warsaw, Poland	195.149.234.87	Open	472
London Network Access Point	London, United Kingdom	5.57.82.220	Selective	314
DE-CIX New York	New York, United States	206.82.104.42	Selective	285
SwissIX	Zurich, Switzerland	91.206.52.191	Selective	256
DE-CIX Dusseldorf	Düsseldorf, Germany	185.1.170.1	Selective	227
DE-CIX Madrid	Madrid, Spain	185.1.192.133	Selective	226
New York International Internet Exchange	New York, United States	198.32.160.234	Selective	213
DE-CIX Munich	Munich, Germany	185.1.208.15	Selective	211
Peering.cz	Prague, Czech Republic	185.0.20.30	Selective	211
NIX.CZ - Neutral Internet eXchange for the Czech Republic	Prague, Czech Republic	91.210.16.147	Selective	208
DE-CIX Hamburg	Hamburg, Germany	185.1.210.36	Selective	196
Vienna Internet Exchange	Vienna, Austria	193.203.0.154	Selective	188
ESpanix Madrid Lower LAN	Madrid, Spain	193.149.1.141	Selective	177
Berlin Commercial Internet Exchange	Berlin, Germany	193.178.185.44	Selective	153
Budapest Internet Exchange	Budapest, Hungary	193.188.137.75	Selective	120
Megaport Dusseldorf IX	Düsseldorf, Germany	194.146.118.151	Selective	98
Norwegian Internet Exchange Oslo 1	Oslo, Norway	185.1.55.83	Selective	69
Stuttgarter Internet Exchange	Stuttgart, Germany	193.138.31.27	Selective	37
Netnod Sundsvall- Gävle	Sundsvall, Sweden	194.68.128.117	Selective	18

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 2026-10-13 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,346 exchanges and 98,177 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.