asn.dev

Observed topology

AS39912 I3B-AS

Unclassified RIPE

Upstreams 12 carry this network
Downstreams 11 this network carries
Adjacent (IPv4) 20
Adjacent (IPv6) 13
Upstream graph Who carries AS39912, and who carries them, drawn as a map up to the transit-free core. 9 exchanges Where AS39912 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 12

Networks observed carrying traffic for AS39912: 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
AS8540AMA netwoRX GmbHUnclassifiedIPv4 IPv62,371
AS34549meerfarbig GmbH & Co. KGHostingIPv4129
AS6939Hurricane Electric LLCTransitIPv684
AS24482SG.GSHostingIPv4 IPv646
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv646
AS3303Swisscom (Schweiz) AGResidentialIPv443
AS20485Joint Stock Company TransTeleComUnclassifiedIPv443
AS34019Hivane AssociationUnclassifiedIPv443
AS37100SEACOM LimitedUnclassifiedIPv443
AS212024Marc SchmittUnclassifiedIPv443

All 12 upstreams →

Transit

Downstream networks

All 11

Networks for which AS39912 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS59456HMB Holding GmbHHostingIPv4 IPv6168
AS61438ip-it consult GmbHUnclassifiedIPv4 IPv6114
AS51413Wirtschaftskammer KaerntenUnclassifiedIPv4 IPv6103
AS61201Hohere technische Bundeslehranstalt KlagenfurtUnclassifiedIPv4 IPv6103
AS61155CUBiT IT Solutions GmbHUnclassifiedIPv4 IPv6102
AS207131Stadtgemeinde LeobenUnclassifiedIPv458
AS50255LITECOM AGUnclassifiedIPv446
AS62373futurenet.gmbHResidentialIPv444
AS44752oja.at GmbHUnclassifiedIPv638
AS62155oja.at GmbHUnclassifiedIPv637

All 11 downstreams →

Adjacency

Adjacent networks

All 25

Every AS seen directly next to AS39912 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS8540AMA netwoRX GmbHUnclassifiedIPv4 IPv62,868
AS6939Hurricane Electric LLCTransitIPv6272
AS59456HMB Holding GmbHHostingIPv4 IPv6168
AS34549meerfarbig GmbH & Co. KGHostingIPv4162
AS61438ip-it consult GmbHUnclassifiedIPv4 IPv6114
AS51413Wirtschaftskammer KaerntenUnclassifiedIPv4 IPv6103
AS61201Hohere technische Bundeslehranstalt KlagenfurtUnclassifiedIPv4 IPv6103
AS61155CUBiT IT Solutions GmbHUnclassifiedIPv4 IPv6102
AS24482SG.GSHostingIPv4 IPv659
AS207131Stadtgemeinde LeobenUnclassifiedIPv458

All 25 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-17 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.18M 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.