Observed topology

AS33189 SOUTH-DAKOTA-RESEARCH-AND-EDUCATION-NETWORK - South Dakota Board of Regents

Unclassified APNIC

Upstreams 4 carry this network

Downstreams 7 this network carries

Adjacent (IPv4) 11

Adjacent (IPv6) 4

Upstream graph Who carries AS33189, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS33189 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS33189: 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.

AS	Network	Type	Families	Paths seen
AS14263	South Dakota State Government	Unclassified	IPv4 IPv6	249
AS11164	Internet2	Education	IPv4 IPv6	35
AS11317	Great Plains Network	Education	IPv4 IPv6	27
AS11537	Internet2	Unclassified	IPv4 IPv6	22

Transit

Downstream networks

inferred

Networks for which AS33189 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS11736	University of South Dakota	Education	IPv4	80
AS22215	Black Hills State University	Unclassified	IPv4	78
AS11602	South Dakota School of Mines & Technology	Education	IPv4	60
AS22851	Northern State University	Unclassified	IPv4	40
AS11607	South Dakota State University	Education	IPv4	10
AS23122	Dakota State University	Unclassified	IPv4	10
AS26498	Sanford Underground Laboratory at Homestake	Unclassified	IPv4	10

Adjacency

Adjacent networks

All 11

Every AS seen directly next to AS33189 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS14263	South Dakota State Government	Unclassified	IPv4 IPv6	249
AS11537	Internet2	Unclassified	IPv4 IPv6	159
AS11164	Internet2	Education	IPv4 IPv6	143
AS11736	University of South Dakota	Education	IPv4	80
AS22215	Black Hills State University	Unclassified	IPv4	78
AS11317	Great Plains Network	Education	IPv4 IPv6	70
AS11602	South Dakota School of Mines & Technology	Education	IPv4	60
AS22851	Northern State University	Unclassified	IPv4	40
AS11607	South Dakota State University	Education	IPv4	10
AS23122	Dakota State University	Unclassified	IPv4	10

All 11 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M 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.