Observed topology

AS13781 ENERGYNET

Unclassified ARIN Cable/DSL/ISP

Upstreams 5 carry this network

Downstreams 3 this network carries

Adjacent (IPv4) 8

Adjacent (IPv6) 5

Upstream graph Who carries AS13781, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS13781 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS13781: 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
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	1,083
AS1299	Arelion Sweden AB	Transit	IPv4	144
AS6461	Zayo Bandwidth	Transit	IPv4 IPv6	70
AS3356	Level 3 Parent, LLC	Transit	IPv4	38
AS40749	CLARKSVILLE DEPARTMENT OF ELECTRICITY	Unclassified	IPv4	2

Transit

Downstream networks

inferred

Networks for which AS13781 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS31867	Schwartz Networks Limited Liability Company	Unclassified	IPv4 IPv6	1,103
AS14749	Russellville Electric Plant Board	Unclassified	IPv4 IPv6	88
AS401325	Logan Aluminum Inc.	Unclassified	IPv4	13

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS13781 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	2,049
AS31867	Schwartz Networks Limited Liability Company	Unclassified	IPv4 IPv6	1,139
AS1299	Arelion Sweden AB	Transit	IPv4 IPv6	303
AS6461	Zayo Bandwidth	Transit	IPv4 IPv6	137
AS14749	Russellville Electric Plant Board	Unclassified	IPv4 IPv6	88
AS3356	Level 3 Parent, LLC	Transit	IPv4	74
AS40749	CLARKSVILLE DEPARTMENT OF ELECTRICITY	Unclassified	IPv4	14
AS401325	Logan Aluminum Inc.	Unclassified	IPv4	13

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-19 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.17M 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.