Observed topology

AS51155 TBTELECOM

Unclassified RIPE

Upstreams 9 carry this network

Downstreams 4 this network carries

Adjacent (IPv4) 11

Adjacent (IPv6) 5

Upstream graph Who carries AS51155, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS51155 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS51155: 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
AS3356	Level 3 Parent, LLC	Transit	IPv4	132
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	60
AS9002	RETN Limited	Unclassified	IPv6	7
AS24482	SG.GS	Hosting	IPv4 IPv6	4
AS8218	Zayo Infrastructure France SA	Unclassified	IPv4	3
AS34927	iFog GmbH	Hosting	IPv4	3
AS50629	LWLcom GmbH	Unclassified	IPv4	3
AS29632	Netassist International EOOD	Unclassified	IPv6	2
AS201054	Stowarzyszenie e-Poludnie	Unclassified	IPv6	1

Transit

Downstream networks

inferred

Networks for which AS51155 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS41865	BIALL-NET Sp. z o.o.	Unclassified	IPv4	357
AS206651	Telemedian Sp. z o.o.	Unclassified	IPv4	59
AS56408	Gdansk Airport Sp. z o.o.	Unclassified	IPv4	8
AS51976	JP-Telekom Sp z o.o.	Unclassified	IPv4	2

Adjacency

Adjacent networks

All 13

Every AS seen directly next to AS51155 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS3356	Level 3 Parent, LLC	Transit	IPv4	445
AS41865	BIALL-NET Sp. z o.o.	Unclassified	IPv4	357
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	140
AS206651	Telemedian Sp. z o.o.	Unclassified	IPv4	59
AS24482	SG.GS	Hosting	IPv4 IPv6	13
AS8218	Zayo Infrastructure France SA	Unclassified	IPv4	10
AS34927	iFog GmbH	Hosting	IPv4	10
AS50629	LWLcom GmbH	Unclassified	IPv4	10
AS56408	Gdansk Airport Sp. z o.o.	Unclassified	IPv4	8
AS9002	RETN Limited	Unclassified	IPv6	7

All 13 adjacent →

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.