Observed topology

AS20552 HORYZONT

Hosting RIPE

Upstreams 5 carry this network

Downstreams 29 this network carries

Adjacent (IPv4) 34

Adjacent (IPv6) 5

Upstream graph Who carries AS20552, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS20552 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS20552: 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
AS9002	RETN Limited	Unclassified	IPv4 IPv6	1,049
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	261
AS1299	Arelion Sweden AB	Transit	IPv4 IPv6	100
AS50606	Horyzont Technologie Internetowe sp.z.o.o.	Unclassified	IPv4	46
AS29314	VECTRA S.A.	Residential	IPv4	22

Transit

Downstream networks

All 29

Networks for which AS20552 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS206523	Poznan University of Technology	Unclassified	IPv4	508
AS197227	Poznanska Spoldzielnia Mieszkaniowa "Winogrady" w Poznaniu	Unclassified	IPv4	321
AS57643	AirCity Krzysztof Janukowicz	Unclassified	IPv4	294
AS209892	LEXELL MICHAL SZYDLOWSKI	Unclassified	IPv4	200
AS42986	IZACOM Sp. z o.o.	Unclassified	IPv4	98
AS41618	Komputronik S.A.	Unclassified	IPv4 IPv6	87
AS61311	ProfiGroup Lukasz Grzelak	Unclassified	IPv4	59
AS198865	PRESS-SERVICE Monitoring Mediow sp. z o.o.	Unclassified	IPv4	59
AS204447	TRECOM Poznan Sp. z o.o.	Unclassified	IPv4	59
AS43914	ECCO HOLIDAY SP. Z O.O.	Unclassified	IPv4	58

All 29 downstreams →

Adjacency

Adjacent networks

All 34

Every AS seen directly next to AS20552 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS9002	RETN Limited	Unclassified	IPv4 IPv6	1,782
AS1299	Arelion Sweden AB	Transit	IPv4 IPv6	1,171
AS206523	Poznan University of Technology	Unclassified	IPv4	508
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	462
AS197227	Poznanska Spoldzielnia Mieszkaniowa "Winogrady" w Poznaniu	Unclassified	IPv4	321
AS57643	AirCity Krzysztof Janukowicz	Unclassified	IPv4	294
AS29314	VECTRA S.A.	Residential	IPv4	256
AS209892	LEXELL MICHAL SZYDLOWSKI	Unclassified	IPv4	200
AS42986	IZACOM Sp. z o.o.	Unclassified	IPv4	98
AS50606	Horyzont Technologie Internetowe sp.z.o.o.	Unclassified	IPv4	90

All 34 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-12 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.21M 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.