asn.dev

Observed topology

AS2381 WISCNET1-AS - WiscNet

Unclassified ARIN

Upstreams 8 carry this network
Downstreams 33 this network carries
Adjacent (IPv4) 43
Adjacent (IPv6) 15
Upstream graph Who carries AS2381, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS2381 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS2381: 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 IPv61,502
AS1299Arelion Sweden ABTransitIPv4 IPv6445
AS11537Internet2UnclassifiedIPv4 IPv6184
AS3257GTT Communications Inc.TransitIPv4 IPv6139
AS11164Internet2EducationIPv4 IPv6112
AS3303Swisscom (Schweiz) AGResidentialIPv439
AS24482SG.GSHostingIPv4 IPv638
AS293ESnetUnclassifiedIPv436

Transit

Downstream networks

All 33

Networks for which AS2381 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS1736Marquette UniversityUnclassifiedIPv43,161
AS103Northwestern UniversityUnclassifiedIPv4 IPv6916
AS395963WCANUnclassifiedIPv4536
AS11500Milwaukee School of EngineeringEducationIPv4504
AS33503Medical College of WisconsinUnclassifiedIPv4 IPv6437
AS3128University of Wisconsin SystemEducationIPv4386
AS14192Carthage CollegeUnclassifiedIPv4268
AS3136State of WI Dept. of AdministrationUnclassifiedIPv4 IPv6264
AS53355Concordia University WisconsinUnclassifiedIPv4 IPv6236
AS22971ST. VINCENT HOSPITAL OF THE HOSPITAL SISTERS OF THE THIRD ORDER OF ST. FRANCISUnclassifiedIPv4180

All 33 downstreams →

Adjacency

Adjacent networks

All 43

Every AS seen directly next to AS2381 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv612,985
AS19782Indiana UniversityUnclassifiedIPv43,317
AS1736Marquette UniversityUnclassifiedIPv43,161
AS3128University of Wisconsin SystemEducationIPv41,299
AS1299Arelion Sweden ABTransitIPv4 IPv61,127
AS57University of MinnesotaUnclassifiedIPv4 IPv61,007
AS103Northwestern UniversityUnclassifiedIPv4 IPv6916
AS11537Internet2UnclassifiedIPv4 IPv6829
AS395963WCANUnclassifiedIPv4536
AS11500Milwaukee School of EngineeringEducationIPv4504

All 43 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M 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.