asn.dev

Observed topology

AS61955 COLOCATIONIX-AS

Upstreams 34 carry this network
Downstreams 6 this network carries
Adjacent (IPv4) 36
Adjacent (IPv6) 17

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS61955: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv6202
AS174Cogent Communications, LLCTransitIPv4 IPv6126
AS50629LWLcom GmbHUnclassifiedIPv4 IPv6100
AS9145EWE TEL GmbHResidentialIPv481
AS50304Blix Solutions ASUnclassifiedIPv4 IPv621
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv615
AS50300CustodianDC LimitedUnclassifiedIPv4 IPv615
AS24482SG.GSHostingIPv4 IPv615
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv611
AS48185team.blue NVUnclassifiedIPv4 IPv611
AS34800Securebit AGUnclassifiedIPv49
AS212024Marc SchmittUnclassifiedIPv49
AS20766Association "Gitoyen"UnclassifiedIPv49
AS50628Leonix Telecom SASUnclassifiedIPv49
AS56655Gigahost ASUnclassifiedIPv49
AS12779IT.Gate S.p.A.UnclassifiedIPv49
AS4637Telstra GlobalUnclassifiedIPv49
AS17639Converge ICT Solutions Inc.UnclassifiedIPv49
AS42708Glesys ABUnclassifiedIPv49
AS29504Freenet Liberec, z.s.UnclassifiedIPv49
AS8434Telenor Sverige ABResidentialIPv49
AS20485Joint Stock Company TransTeleComUnclassifiedIPv49
AS37721Virtual Technologies & SolutionsResidentialIPv49
AS37100SEACOM LimitedUnclassifiedIPv49
AS3303Swisscom (Schweiz) AGResidentialIPv49
AS3741Dimension DataUnclassifiedIPv49
AS57463NetIX Communications JSCUnclassifiedIPv49
AS12552GlobalConnect ABUnclassifiedIPv49
AS293ESnetUnclassifiedIPv49
AS1836green.ch AGResidentialIPv49
AS213241TECHIT.BE SRLResidentialIPv66
AS13030Init7 (Switzerland) Ltd.HostingIPv64
AS34549meerfarbig GmbH & Co. KGHostingIPv64
AS9002RETN LimitedUnclassifiedIPv64

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you.

Transit

Downstream networks

inferred

Networks for which AS61955 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS31055Consultix GmbHUnclassifiedIPv41,353
AS57137SIEVERS-SNC Beteiligungs GmbHUnclassifiedIPv4 IPv6238
AS204368Joerg Suenram trading as it NGO GmbH & Co. KGUnclassifiedIPv4 IPv6237
AS50905LAND-DATA Beteiligungs GmbHUnclassifiedIPv4153
AS44599Fabio Martin trading as FM-Datacenter GmbH & Co. KGUnclassifiedIPv4153
AS3337ColocationIX GmbHHostingIPv4115

Adjacency

Adjacent networks

53 shown

Every AS seen directly next to AS61955 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS31055Consultix GmbHUnclassifiedIPv41,353
AS6939Hurricane Electric LLCTransitIPv4 IPv6595
AS50629LWLcom GmbHUnclassifiedIPv4 IPv6568
AS57137SIEVERS-SNC Beteiligungs GmbHUnclassifiedIPv4 IPv6238
AS204368Joerg Suenram trading as it NGO GmbH & Co. KGUnclassifiedIPv4 IPv6237
AS9145EWE TEL GmbHResidentialIPv4211
AS50905LAND-DATA Beteiligungs GmbHUnclassifiedIPv4153
AS44599Fabio Martin trading as FM-Datacenter GmbH & Co. KGUnclassifiedIPv4153
AS50304Blix Solutions ASUnclassifiedIPv4 IPv6141
AS174Cogent Communications, LLCTransitIPv4 IPv6126
AS3337ColocationIX GmbHHostingIPv4115
AS24482SG.GSHostingIPv4 IPv666
AS50300CustodianDC LimitedUnclassifiedIPv4 IPv666
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv661
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv660
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv659
AS42708Glesys ABUnclassifiedIPv455
AS56655Gigahost ASUnclassifiedIPv455
AS8434Telenor Sverige ABResidentialIPv455
AS37721Virtual Technologies & SolutionsResidentialIPv455
AS20766Association "Gitoyen"UnclassifiedIPv455
AS50628Leonix Telecom SASUnclassifiedIPv455
AS57463NetIX Communications JSCUnclassifiedIPv455
AS37100SEACOM LimitedUnclassifiedIPv455
AS293ESnetUnclassifiedIPv455
AS3303Swisscom (Schweiz) AGResidentialIPv455
AS3741Dimension DataUnclassifiedIPv455
AS12552GlobalConnect ABUnclassifiedIPv455
AS4637Telstra GlobalUnclassifiedIPv455
AS20485Joint Stock Company TransTeleComUnclassifiedIPv455
AS1836green.ch AGResidentialIPv455
AS12779IT.Gate S.p.A.UnclassifiedIPv455
AS34800Securebit AGUnclassifiedIPv455
AS29504Freenet Liberec, z.s.UnclassifiedIPv455
AS212024Marc SchmittUnclassifiedIPv455
AS213241TECHIT.BE SRLResidentialIPv611
AS48185team.blue NVUnclassifiedIPv4 IPv611
AS13030Init7 (Switzerland) Ltd.HostingIPv67
AS9002RETN LimitedUnclassifiedIPv67
AS34549meerfarbig GmbH & Co. KGHostingIPv67
AS1103SURF B.V.UnclassifiedIPv63

Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Interconnection

Exchange presence

recorded

Internet exchanges where Packet Clearing House has a port recorded for AS61955, largest fabric first. An exchange is shared switching where networks interconnect directly rather than paying a transit provider to carry traffic between them, so turning up at one is a deliberate choice about how this network wants to be reached. Each name opens that exchange's own page, with its peering LANs and every other network recorded on it. Recorded at 10 exchanges across 6 countries and 1 region.

ExchangeLocationTheir addressMember ports
DE-CIX FrankfurtFrankfurt, Germany80.81.192.1531,073
LINX LON1London, United Kingdom195.66.224.13925
AMS-IX AmsterdamAmsterdam, Netherlands80.249.211.155894
France-IX ParisParis, France37.49.237.214570
Peering.czPrague, Czech Republic185.0.20.134212
DE-CIX HamburgHamburg, Germany185.1.210.9195
ERA-IX AmsterdamAmsterdam, Netherlands185.1.240.168193
Berlin Commercial Internet ExchangeBerlin, Germany193.178.185.127152
France-IX MarseilleMarseille, France37.49.232.88127
Netnod Sundsvall- GävleSundsvall, Sweden194.68.128.4618

Unlike the tables above, this is recorded rather than inferred. An address on a peering LAN is at that exchange by definition. Two carve-outs all the same. Member ports counts every participant at the exchange, not this network's ports, so read it as a size proxy. And an absent exchange means PCH has no record of it, not that the network is not there.

Provenance

Where this comes from

Derived from routing tables collected at 2026-08-08 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.02M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.

Exchange presence comes from a separate dataset: the directory collected 2026-08-09 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,327 exchanges and 93,164 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.