Observed topology

AS211251 A1-DC A1 Internet BV

Unclassified RIPE

Upstreams 9 carry this network

Downstreams 1 this network carries

Adjacent (IPv4) 10

Adjacent (IPv6) 0

Upstream graph Who carries AS211251, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS211251 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS211251: 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
AS6424	EDGOO NETWORKS UNIPESSOAL LDA	Hosting	IPv4	256
AS57866	Fusix Networks B.V.	Unclassified	IPv4	176
AS44854	Arend Brouwer	Hosting	IPv4	140
AS6939	Hurricane Electric LLC	Transit	IPv4	56
AS1103	SURF B.V.	Unclassified	IPv4	11
AS24482	SG.GS	Hosting	IPv4	11
AS34019	Hivane Association	Unclassified	IPv4	11
AS34927	iFog GmbH	Hosting	IPv4	11
AS37721	Virtual Technologies & Solutions	Residential	IPv4	11

Transit

Downstream networks

inferred

Networks for which AS211251 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS203966	A1 Internet BV	Unclassified	IPv4	52

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS211251 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS6424	EDGOO NETWORKS UNIPESSOAL LDA	Hosting	IPv4	273
AS57866	Fusix Networks B.V.	Unclassified	IPv4	195
AS44854	Arend Brouwer	Hosting	IPv4	144
AS6939	Hurricane Electric LLC	Transit	IPv4	64
AS203966	A1 Internet BV	Unclassified	IPv4	52
AS24482	SG.GS	Hosting	IPv4	12
AS34019	Hivane Association	Unclassified	IPv4	12
AS34927	iFog GmbH	Hosting	IPv4	12
AS37721	Virtual Technologies & Solutions	Residential	IPv4	12
AS1103	SURF B.V.	Unclassified	IPv4	11

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M 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.