asn.dev

Observed topology

AS40220 MARIA

Unclassified ARIN Educational/Research

Upstreams 5 carry this network
Downstreams 11 this network carries
Adjacent (IPv4) 22
Adjacent (IPv6) 9
Upstream graph Who carries AS40220, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS40220 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS40220: 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
AS174Cogent Communications, LLCTransitIPv4 IPv6168
AS11164Internet2EducationIPv4 IPv678
AS6939Hurricane Electric LLCTransitIPv633
AS11537Internet2UnclassifiedIPv4 IPv616
AS24482SG.GSHostingIPv61

Transit

Downstream networks

All 11

Networks for which AS40220 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS1201Old Dominion UniversityUnclassifiedIPv41,382
AS225University of VirginiaUnclassifiedIPv4296
AS26499Virginia Polytechnic Institute and State Univ.UnclassifiedIPv4 IPv6276
AS11279George Mason UniversityEducationIPv4 IPv6237
AS1312Virginia Polytechnic Institute and State Univ.UnclassifiedIPv4 IPv6221
AS1411Christopher Newport UniversityUnclassifiedIPv4189
AS11975The College of William and MaryEducationIPv4173
AS3140The Thomas Jefferson High School for Science and Tech.EducationIPv4 IPv695
AS16643Virginia Commonwealth UniversityUnclassifiedIPv440
AS4922Shenandoah Cable Television LLCResidentialIPv48

All 11 downstreams →

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS40220 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1201Old Dominion UniversityUnclassifiedIPv41,382
AS11164Internet2EducationIPv4 IPv61,066
AS174Cogent Communications, LLCTransitIPv4 IPv6863
AS11537Internet2UnclassifiedIPv4 IPv6554
AS6939Hurricane Electric LLCTransitIPv4 IPv6365
AS225University of VirginiaUnclassifiedIPv4296
AS10490Georgia Institute of TechnologyEducationIPv4277
AS26499Virginia Polytechnic Institute and State Univ.UnclassifiedIPv4 IPv6276
AS11279George Mason UniversityEducationIPv4 IPv6237
AS1312Virginia Polytechnic Institute and State Univ.UnclassifiedIPv4 IPv6233

All 22 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-28 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.21M 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.