asn.dev

Observed topology

AS6325 ILLINOIS-CENTURY

Unclassified ARIN

Upstreams 6 carry this network
Downstreams 43 this network carries
Adjacent (IPv4) 50
Adjacent (IPv6) 6
Upstream graph Who carries AS6325, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS6325 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS6325: 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
AS6461Zayo BandwidthTransitIPv4 IPv61,739
AS174Cogent Communications, LLCTransitIPv4 IPv6997
AS6939Hurricane Electric LLCTransitIPv4 IPv6367
AS22335Metropolitan Research and Education NetworkUnclassifiedIPv4 IPv6289
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv6181
AS293ESnetUnclassifiedIPv423

Transit

Downstream networks

All 43

Networks for which AS6325 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS394534City of ChicagoUnclassifiedIPv4607
AS46286Cook CountyUnclassifiedIPv4259
AS53695Southern Illinois University at EdwardsvilleUnclassifiedIPv4252
AS397112Illinois Mathematics and Science AcademyUnclassifiedIPv4237
AS19070Eastern Illinois UniversityUnclassifiedIPv4183
AS22887Western Illinois UniversityUnclassifiedIPv4122
AS33460Waubonsee Community CollegeUnclassifiedIPv4119
AS395433Township High School District 214UnclassifiedIPv4116
AS32344Community High School District 99UnclassifiedIPv4114
AS33019Wheaton CollegeUnclassifiedIPv478

All 43 downstreams →

Adjacency

Adjacent networks

All 50

Every AS seen directly next to AS6325 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv63,166
AS6461Zayo BandwidthTransitIPv4 IPv61,997
AS6939Hurricane Electric LLCTransitIPv4 IPv6637
AS394534City of ChicagoUnclassifiedIPv4607
AS22335Metropolitan Research and Education NetworkUnclassifiedIPv4 IPv6558
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv6507
AS46286Cook CountyUnclassifiedIPv4259
AS53695Southern Illinois University at EdwardsvilleUnclassifiedIPv4252
AS397112Illinois Mathematics and Science AcademyUnclassifiedIPv4237
AS19070Eastern Illinois UniversityUnclassifiedIPv4183

All 50 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-15 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.09M 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.