asn.dev

Observed topology

AS204188 AS-ITSG ITSG Informationstechnische Servicestelle der Gesetzlichen Krankenversicherung GmbH

Unclassified RIPE Enterprise

Upstreams 9 carry this network
Downstreams 0 this network carries
Adjacent (IPv4) 8
Adjacent (IPv6) 8
Upstream graph Who carries AS204188, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS204188 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS204188: 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
AS5405Inter.link GmbHUnclassifiedIPv4 IPv667
AS33891Core-Backbone GmbHHostingIPv4 IPv654
AS3356Level 3 Parent, LLCTransitIPv4 IPv637
AS6939Hurricane Electric LLCTransitIPv4 IPv636
AS1299Arelion Sweden ABTransitIPv4 IPv634
AS3257GTT Communications Inc.TransitIPv4 IPv611
AS24482SG.GSHostingIPv4 IPv65
AS29632Netassist International EOODUnclassifiedIPv64
AS37100SEACOM LimitedUnclassifiedIPv43

Transit

Downstream networks

inferred

Networks for which AS204188 was observed as the last hop before the origin, meaning it appears to provide them transit.

No downstream observed. This network does not appear to carry transit for anyone.

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS204188 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS5405Inter.link GmbHUnclassifiedIPv4 IPv667
AS33891Core-Backbone GmbHHostingIPv4 IPv654
AS3356Level 3 Parent, LLCTransitIPv4 IPv637
AS6939Hurricane Electric LLCTransitIPv4 IPv636
AS1299Arelion Sweden ABTransitIPv4 IPv634
AS3257GTT Communications Inc.TransitIPv4 IPv611
AS24482SG.GSHostingIPv4 IPv65
AS29632Netassist International EOODUnclassifiedIPv64
AS37100SEACOM LimitedUnclassifiedIPv43

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-05 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 73.57M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

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. 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.

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