asn.dev

Observed topology

AS29056 CITYCOM-AS

Upstreams 7 carry this network
Downstreams 9 this network carries
Adjacent (IPv4) 14
Adjacent (IPv6) 7

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS29056: 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
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv4474
AS8447A1 Telekom Austria AGResidentialIPv4 IPv6411
AS6939Hurricane Electric LLCTransitIPv4136
AS3303Swisscom (Schweiz) AGResidentialIPv434
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv618
AS57463NetIX Communications JSCUnclassifiedIPv417
AS9002RETN LimitedUnclassifiedIPv62

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 AS29056 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS41437KNAPP AGUnclassifiedIPv4 IPv6181
AS29143Magistrat GrazUnclassifiedIPv4159
AS204410Feistritzwerke-STEWEAG GmbHUnclassifiedIPv4 IPv683
AS35646Grazer Wechselseitige Versicherung AGUnclassifiedIPv480
AS41198IGT Austria GmbHUnclassifiedIPv462
AS47106Anton Paar GmbHUnclassifiedIPv462
AS48735DELTA DIGITAL Friesenbichler & Co GmbHUnclassifiedIPv462
AS44462Stadtwerke Muerzzuschlag GmbHUnclassifiedIPv4 IPv645
AS31473BearingPoint GmbHUnclassifiedIPv638

Adjacency

Adjacent networks

21 shown

Every AS seen directly next to AS29056 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS8447A1 Telekom Austria AGResidentialIPv4 IPv61,057
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv4474
AS6939Hurricane Electric LLCTransitIPv4226
AS41437KNAPP AGUnclassifiedIPv4 IPv6181
AS29143Magistrat GrazUnclassifiedIPv4159
AS204410Feistritzwerke-STEWEAG GmbHUnclassifiedIPv4 IPv683
AS35646Grazer Wechselseitige Versicherung AGUnclassifiedIPv480
AS41198IGT Austria GmbHUnclassifiedIPv462
AS47106Anton Paar GmbHUnclassifiedIPv462
AS48735DELTA DIGITAL Friesenbichler & Co GmbHUnclassifiedIPv462
AS3303Swisscom (Schweiz) AGResidentialIPv456
AS44462Stadtwerke Muerzzuschlag GmbHUnclassifiedIPv4 IPv645
AS31473BearingPoint GmbHUnclassifiedIPv638
AS57463NetIX Communications JSCUnclassifiedIPv430
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv618
AS9002RETN LimitedUnclassifiedIPv63

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 AS29056, 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 3 exchanges across 2 countries and 1 region.

ExchangeLocationTheir addressMember ports
DE-CIX FrankfurtFrankfurt, Germany80.81.197.761,073
DE-CIX MunichMunich, Germany185.1.209.2207
Vienna Internet ExchangeVienna, Austria193.203.0.144188

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.