asn.dev

Observed topology

AS2153 CENIC-2153

Unclassified ARIN

Upstreams 4 carry this network
Downstreams 40 this network carries
Adjacent (IPv4) 43
Adjacent (IPv6) 14
Upstream graph Who carries AS2153, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS2153 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS2153: 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
AS11537Internet2UnclassifiedIPv4 IPv648
AS293ESnetUnclassifiedIPv411
AS7575Australian Academic and Research Network (AARNet)EducationIPv411
AS2152CENICUnclassifiedIPv42

Transit

Downstream networks

All 40

Networks for which AS2153 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS2152CENICUnclassifiedIPv4 IPv63,243
AS2907Research Organization of Information and Systems, National Institute of InformaticsUnclassifiedIPv4604
AS668United States Department of Defense (DoD)BusinessIPv4190
AS195San Diego Supercomputer CenterUnclassifiedIPv4 IPv6184
AS7575Australian Academic and Research Network (AARNet)EducationIPv4169
AS6192University of California, DavisEducationIPv4 IPv6105
AS7377University of California, San DiegoEducationIPv4 IPv697
AS52University of California, Los AngelesUnclassifiedIPv4 IPv661
AS46985The Regents of the University of California - University of California, San Diego.UnclassifiedIPv443
AS31California Institute of TechnologyUnclassifiedIPv4 IPv631

All 40 downstreams →

Adjacency

Adjacent networks

All 43

Every AS seen directly next to AS2153 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS2152CENICUnclassifiedIPv4 IPv625,944
AS11537Internet2UnclassifiedIPv4 IPv617,144
AS7575Australian Academic and Research Network (AARNet)EducationIPv4 IPv64,879
AS293ESnetUnclassifiedIPv41,515
AS6509CANARIE IncEducationIPv41,124
AS2907Research Organization of Information and Systems, National Institute of InformaticsUnclassifiedIPv4 IPv61,070
AS17579KISTIEducationIPv4579
AS567Los NettosUnclassifiedIPv4351
AS195San Diego Supercomputer CenterUnclassifiedIPv4 IPv6317
AS668United States Department of Defense (DoD)BusinessIPv4287

All 43 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-11 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.47M 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.