Observed topology

AS51580 TIMENET-AS

Residential RIPE

Upstreams 12 carry this network

Downstreams 4 this network carries

Adjacent (IPv4) 16

Adjacent (IPv6) 0

Upstream graph Who carries AS51580, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS51580 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 12

Networks observed carrying traffic for AS51580: 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
AS41327	Fiber Telecom S.p.A.	Residential	IPv4	897
AS12874	Fastweb SpA	Residential	IPv4	495
AS9002	RETN Limited	Unclassified	IPv4	255
AS6939	Hurricane Electric LLC	Transit	IPv4	175
AS6762	TELECOM ITALIA SPARKLE S.p.A.	Transit	IPv4	90
AS3257	GTT Communications Inc.	Transit	IPv4	62
AS3269	Telecom Italia S.p.A.	Residential	IPv4	45
AS28716	Retelit Digital Services S.p.A.	Unclassified	IPv4	28
AS24482	SG.GS	Hosting	IPv4	18
AS59919	Brainbox S.r.l.	Residential	IPv4	18

All 12 upstreams →

Transit

Downstream networks

inferred

Networks for which AS51580 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS202552	PROTEC di Rinaldo Silvano & C. Snc	Unclassified	IPv4	106
AS41071	OPENPOP SA	Unclassified	IPv4	62
AS212608	SOLUNET GROUP S.P.A.	Residential	IPv4	62
AS211756	NEW ASSISTENT S.R.L.	Unclassified	IPv4	60

Adjacency

Adjacent networks

All 16

Every AS seen directly next to AS51580 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS41327	Fiber Telecom S.p.A.	Residential	IPv4	1,036
AS12874	Fastweb SpA	Residential	IPv4	549
AS9002	RETN Limited	Unclassified	IPv4	286
AS6939	Hurricane Electric LLC	Transit	IPv4	203
AS202552	PROTEC di Rinaldo Silvano & C. Snc	Unclassified	IPv4	106
AS6762	TELECOM ITALIA SPARKLE S.p.A.	Transit	IPv4	100
AS3257	GTT Communications Inc.	Transit	IPv4	78
AS41071	OPENPOP SA	Unclassified	IPv4	62
AS212608	SOLUNET GROUP S.P.A.	Residential	IPv4	62
AS211756	NEW ASSISTENT S.R.L.	Unclassified	IPv4	60

All 16 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-31 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.50M 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.