Observed topology

AS2 UDEL-DCN

Unclassified ARIN

Upstreams 9 carry this network

Downstreams 1 this network carries

Adjacent (IPv4) 10

Adjacent (IPv6) 1

Upstream graph Who carries AS2, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS2 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS2: 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
AS45609	Bharti Airtel Ltd. AS for GPRS Service	Mobile	IPv4	118
AS34	University of Delaware	Unclassified	IPv4	63
AS41837	"South telephone company" LLC	Unclassified	IPv4	58
AS203794	LLC Gals-Telecom	Unclassified	IPv4	44
AS52752	Vegas Telecom Informatica Ltda.	Unclassified	IPv4	9
AS270792	luciano comin cardozo-me	Unclassified	IPv4	6
AS37628	KAB Technologies	Unclassified	IPv4	2
AS199268	LANCOM inzeniring racunalniskig sistemov d.o.o.	Unclassified	IPv6	1
AS327753	SBM BANK (KENYA) LIMITED	Unclassified	IPv4	1

Transit

Downstream networks

inferred

Networks for which AS2 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS37280	Broad Based Communications Limited	Hosting	IPv4	2

Adjacency

Adjacent networks

All 11

Every AS seen directly next to AS2 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS45609	Bharti Airtel Ltd. AS for GPRS Service	Mobile	IPv4	118
AS34	University of Delaware	Unclassified	IPv4	63
AS41837	"South telephone company" LLC	Unclassified	IPv4	58
AS203794	LLC Gals-Telecom	Unclassified	IPv4	44
AS52752	Vegas Telecom Informatica Ltda.	Unclassified	IPv4	9
AS270792	luciano comin cardozo-me	Unclassified	IPv4	6
AS37280	Broad Based Communications Limited	Hosting	IPv4	2
AS37613	DOLPHIN TELECOMMUNICATION LIMITED	Unclassified	IPv4	2
AS37628	KAB Technologies	Unclassified	IPv4	2
AS199268	LANCOM inzeniring racunalniskig sistemov d.o.o.	Unclassified	IPv6	1

All 11 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-14 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.25M 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.