asn.dev

Observed topology

AS5050 PSC-EXT - Pittsburgh Supercomputing Center

Education ARIN Educational/Research

Upstreams 6 carry this network
Downstreams 14 this network carries
Adjacent (IPv4) 20
Adjacent (IPv6) 10
Upstream graph Who carries AS5050, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS5050 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS5050: 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 IPv6534
AS6939Hurricane Electric LLCTransitIPv4 IPv6168
AS3356Level 3 Parent, LLCTransitIPv4 IPv6154
AS11164Internet2EducationIPv4 IPv673
AS11537Internet2UnclassifiedIPv4 IPv668
AS293ESnetUnclassifiedIPv414

Transit

Downstream networks

All 14

Networks for which AS5050 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS7925West Virginia Network for Educational TelecomputingEducationIPv4185
AS1206Pittsburgh Supercomputing CenterUnclassifiedIPv4181
AS1207Pittsburgh Supercomputing CenterUnclassifiedIPv4179
AS23102Robert Morris UniversityUnclassifiedIPv4115
AS36407Software Engineering InstituteUnclassifiedIPv4 IPv6103
AS3783Allegheny Intermediate UnitEducationIPv496
AS19281Quad9HostingIPv456
AS4130University of PittsburghEducationIPv4 IPv652
AS9Carnegie Mellon UniversityUnclassifiedIPv4 IPv645
AS12118West Virginia UniversityUnclassifiedIPv435

All 14 downstreams →

Adjacency

Adjacent networks

All 20

Every AS seen directly next to AS5050 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv6981
AS6939Hurricane Electric LLCTransitIPv4 IPv6469
AS11537Internet2UnclassifiedIPv4 IPv6244
AS3356Level 3 Parent, LLCTransitIPv4 IPv6227
AS7925West Virginia Network for Educational TelecomputingEducationIPv4185
AS1206Pittsburgh Supercomputing CenterUnclassifiedIPv4181
AS1207Pittsburgh Supercomputing CenterUnclassifiedIPv4179
AS11164Internet2EducationIPv4 IPv6173
AS3783Allegheny Intermediate UnitEducationIPv4 IPv6116
AS23102Robert Morris UniversityUnclassifiedIPv4115

All 20 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.