Observed topology

AS36253 DCIUNET

Unclassified ARIN

Upstreams 3 carry this network

Downstreams 4 this network carries

Adjacent (IPv4) 7

Adjacent (IPv6) 0

Upstream graph Who carries AS36253, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS36253 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS36253: 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
AS33287	Comcast Cable Communications, LLC	Unclassified	IPv4	41
AS46887	Crown Castle Fiber LLC	Unclassified	IPv4	12
AS33659	Comcast Cable Communications, LLC	Unclassified	IPv4	7

Transit

Downstream networks

inferred

Networks for which AS36253 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS18630	The Ridley School District	Unclassified	IPv4	120
AS393766	Penn Delco School District	Unclassified	IPv4	60
AS62718	Springfield School District	Unclassified	IPv4	15
AS40674	Rose Tree Media School District	Unclassified	IPv4	1

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS36253 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS33287	Comcast Cable Communications, LLC	Unclassified	IPv4	168
AS18630	The Ridley School District	Unclassified	IPv4	120
AS46887	Crown Castle Fiber LLC	Unclassified	IPv4	60
AS393766	Penn Delco School District	Unclassified	IPv4	60
AS33659	Comcast Cable Communications, LLC	Unclassified	IPv4	28
AS62718	Springfield School District	Unclassified	IPv4	15
AS40674	Rose Tree Media School District	Unclassified	IPv4	1

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 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.