Observed topology

AS3754 NYSERNET3-AS

Education ARIN

Upstreams 1 carry this network

Downstreams 68 this network carries

Adjacent (IPv4) 70

Adjacent (IPv6) 19

Upstream graph Who carries AS3754, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS3754 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS3754: 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
AS11537	Internet2	Unclassified	IPv6	1

Transit

Downstream networks

All 68

Networks for which AS3754 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS25935	Erie 1 BOCES	Unclassified	IPv4	123
AS31822	City University of New York	Unclassified	IPv4	81
AS14	Columbia University	Unclassified	IPv4 IPv6	79
AS1204	The State University of New York	Unclassified	IPv4	73
AS12	New York University	Unclassified	IPv4	70
AS54294	ERIE COMMUNITY COLLEGE	Unclassified	IPv4	62
AS5719	State University of New York at Stony Brook	Education	IPv4	58
AS3685	State University of New York at Buffalo	Education	IPv4 IPv6	57
AS54177	St. John Fisher College	Unclassified	IPv4 IPv6	50
AS3756	NYSERNet	Education	IPv4 IPv6	46

All 68 downstreams →

Adjacency

Adjacent networks

All 70

Every AS seen directly next to AS3754 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS11537	Internet2	Unclassified	IPv4 IPv6	1,352
AS293	ESnet	Unclassified	IPv4	217
AS25935	Erie 1 BOCES	Unclassified	IPv4	123
AS12	New York University	Unclassified	IPv4	98
AS31822	City University of New York	Unclassified	IPv4	81
AS14	Columbia University	Unclassified	IPv4 IPv6	79
AS1204	The State University of New York	Unclassified	IPv4	73
AS54294	ERIE COMMUNITY COLLEGE	Unclassified	IPv4	62
AS5719	State University of New York at Stony Brook	Education	IPv4	58
AS3685	State University of New York at Buffalo	Education	IPv4 IPv6	57

All 70 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-21 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M 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.