Observed topology

AS205718 ALCORT

Residential RIPE

Upstreams 6 carry this network

Downstreams 1 this network carries

Adjacent (IPv4) 6

Adjacent (IPv6) 5

Upstream graph Who carries AS205718, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS205718 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS205718: 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	832
AS12479	Orange Espagne SA	Residential	IPv4 IPv6	41
AS29632	Netassist International EOOD	Unclassified	IPv6	18
AS33891	Core-Backbone GmbH	Hosting	IPv4	10
AS37721	Virtual Technologies & Solutions	Residential	IPv4 IPv6	10
AS8218	Zayo Infrastructure France SA	Unclassified	IPv4 IPv6	2

Transit

Downstream networks

inferred

Networks for which AS205718 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS202440	Comunicaciones Opticas Waditel, S.L.	Unclassified	IPv4	165

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS205718 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	993
AS202440	Comunicaciones Opticas Waditel, S.L.	Unclassified	IPv4	165
AS12479	Orange Espagne SA	Residential	IPv4 IPv6	41
AS29632	Netassist International EOOD	Unclassified	IPv6	18
AS33891	Core-Backbone GmbH	Hosting	IPv4	12
AS37721	Virtual Technologies & Solutions	Residential	IPv4 IPv6	12
AS8218	Zayo Infrastructure France SA	Unclassified	IPv4 IPv6	2

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-25 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.18M 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.