asn.dev

Observed topology

AS3128 BRUWS-AS3128

Education APNIC Educational/Research

Upstreams 6 carry this network
Downstreams 6 this network carries
Adjacent (IPv4) 11
Adjacent (IPv6) 7
Upstream graph Who carries AS3128, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS3128 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS3128: 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
AS2381WiscNetUnclassifiedIPv4399
AS1299Arelion Sweden ABTransitIPv4239
AS11164Internet2EducationIPv4 IPv673
AS11537Internet2UnclassifiedIPv4 IPv673
AS6939Hurricane Electric LLCTransitIPv635
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv635

Transit

Downstream networks

inferred

Networks for which AS3128 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS59University of Wisconsin MadisonUnclassifiedIPv4 IPv6954
AS46103University of Wisconsin WhitewaterUnclassifiedIPv4 IPv6413
AS7050University of Wisconsin - MilwaukeeEducationIPv4 IPv6241
AS19184University of Wisconsin - Eau ClaireUnclassifiedIPv4201
AS47065USC / UFMG PEERING Research TestbedEducationIPv477
AS394049University of Wisconsin Hospital and ClinicsUnclassifiedIPv432

Adjacency

Adjacent networks

All 12

Every AS seen directly next to AS3128 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS2381WiscNetUnclassifiedIPv41,310
AS59University of Wisconsin MadisonUnclassifiedIPv4 IPv6954
AS1299Arelion Sweden ABTransitIPv4792
AS46103University of Wisconsin WhitewaterUnclassifiedIPv4 IPv6413
AS7050University of Wisconsin - MilwaukeeEducationIPv4 IPv6241
AS19184University of Wisconsin - Eau ClaireUnclassifiedIPv4201
AS11537Internet2UnclassifiedIPv4 IPv6199
AS11164Internet2EducationIPv4 IPv6189
AS6939Hurricane Electric LLCTransitIPv6172
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv6128

All 12 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-27 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.06M 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.