Observed topology

AS3676 UIOWA-AS

Education ARIN Educational/Research

Upstreams 6 carry this network

Downstreams 3 this network carries

Adjacent (IPv4) 9

Adjacent (IPv6) 6

Upstream graph Who carries AS3676, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS3676 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS3676: 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
AS2381	WiscNet	Unclassified	IPv4 IPv6	112
AS6122	Iowa Communications Network	Unclassified	IPv4 IPv6	93
AS11537	Internet2	Unclassified	IPv4 IPv6	16
AS11164	Internet2	Education	IPv4 IPv6	14
AS1299	Arelion Sweden AB	Transit	IPv4	6
AS293	ESnet	Unclassified	IPv4	3

Transit

Downstream networks

inferred

Networks for which AS3676 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS2698	Iowa State University of Science and Technology	Education	IPv4	197
AS6122	Iowa Communications Network	Unclassified	IPv4 IPv6	27
AS393308	City of Iowa City	Unclassified	IPv4	7

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS3676 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS2381	WiscNet	Unclassified	IPv4 IPv6	301
AS6122	Iowa Communications Network	Unclassified	IPv4 IPv6	221
AS2698	Iowa State University of Science and Technology	Education	IPv4	220
AS11537	Internet2	Unclassified	IPv4 IPv6	68
AS1299	Arelion Sweden AB	Transit	IPv4 IPv6	45
AS3257	GTT Communications Inc.	Transit	IPv4 IPv6	36
AS11164	Internet2	Education	IPv4 IPv6	22
AS293	ESnet	Unclassified	IPv4	14
AS393308	City of Iowa City	Unclassified	IPv4	7

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-29 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.36M 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.