asn.dev

Observed topology

AS16205 DSINET-ASN

Upstreams 19 carry this network
Downstreams 6 this network carries
Adjacent (IPv4) 21
Adjacent (IPv6) 13

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS16205: 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
AS3356Level 3 Parent, LLCTransitIPv4 IPv6222
AS12306Plus.line AGHostingIPv4130
AS13237euNetworks GmbHUnclassifiedIPv4 IPv686
AS6939Hurricane Electric LLCTransitIPv4 IPv686
AS3320Deutsche Telekom AGMobileIPv4 IPv634
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv632
AS24482SG.GSHostingIPv4 IPv612
AS20485Joint Stock Company TransTeleComUnclassifiedIPv410
AS37100SEACOM LimitedUnclassifiedIPv410
AS57463NetIX Communications JSCUnclassifiedIPv410
AS12552GlobalConnect ABUnclassifiedIPv410
AS34800Securebit AGUnclassifiedIPv410
AS48362Stadtwerke FeldkirchResidentialIPv410
AS212024Marc SchmittUnclassifiedIPv410
AS34019Hivane AssociationUnclassifiedIPv410
AS17639Converge ICT Solutions Inc.UnclassifiedIPv410
AS58057Securebit AGUnclassifiedIPv64
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv62
AS56662Marcin GondekUnclassifiedIPv62

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 AS16205 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS209322secunet Security Networks AGUnclassifiedIPv4 IPv698
AS38914Deutsche Telekom MMS GmbHUnclassifiedIPv4 IPv659
AS29627FoerderbankUnclassifiedIPv448
AS206303IT Heinrich GmbHUnclassifiedIPv4 IPv646
AS3573Accenture LLPUnclassifiedIPv635
AS208508Landeshauptstadt Dresden, EB IT Dienstleistungen DresdenUnclassifiedIPv424

Adjacency

Adjacent networks

34 shown

Every AS seen directly next to AS16205 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3356Level 3 Parent, LLCTransitIPv4 IPv6322
AS12306Plus.line AGHostingIPv4163
AS6939Hurricane Electric LLCTransitIPv4 IPv6146
AS13237euNetworks GmbHUnclassifiedIPv4 IPv6116
AS209322secunet Security Networks AGUnclassifiedIPv4 IPv698
AS38914Deutsche Telekom MMS GmbHUnclassifiedIPv4 IPv659
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv650
AS3320Deutsche Telekom AGMobileIPv4 IPv650
AS29627FoerderbankUnclassifiedIPv448
AS206303IT Heinrich GmbHUnclassifiedIPv4 IPv646
AS3573Accenture LLPUnclassifiedIPv635
AS208508Landeshauptstadt Dresden, EB IT Dienstleistungen DresdenUnclassifiedIPv424
AS24482SG.GSHostingIPv4 IPv619
AS20485Joint Stock Company TransTeleComUnclassifiedIPv415
AS57463NetIX Communications JSCUnclassifiedIPv415
AS37100SEACOM LimitedUnclassifiedIPv415
AS212024Marc SchmittUnclassifiedIPv415
AS34800Securebit AGUnclassifiedIPv414
AS12552GlobalConnect ABUnclassifiedIPv413
AS34019Hivane AssociationUnclassifiedIPv413
AS48362Stadtwerke FeldkirchResidentialIPv412
AS58057Securebit AGUnclassifiedIPv611
AS17639Converge ICT Solutions Inc.UnclassifiedIPv410
AS56662Marcin GondekUnclassifiedIPv66
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv65

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 AS16205, 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 6 exchanges across 2 countries and 1 region.

ExchangeLocationTheir addressMember ports
DE-CIX FrankfurtFrankfurt, Germany80.81.197.391,073
DE-CIX DusseldorfDüsseldorf, Germany185.1.171.32226
DE-CIX MunichMunich, Germany185.1.208.237207
DE-CIX HamburgHamburg, Germany185.1.210.229195
EuroGIX retiredStrasbourg, France2001:7f8:79::3f4d:1129
Dresden Internet ExchangeDresden, Germany193.201.151.7212

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 2026-08-08 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,327 exchanges and 93,137 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.