Observed topology

AS21021 MULTIMEDIA-AS Cable DTV Internet Voice Provider in Poland.

Unclassified RIPE NSP

Upstreams 1 carry this network

Downstreams 21 this network carries

Adjacent (IPv4) 22

Adjacent (IPv6) 1

Upstream graph Who carries AS21021, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS21021 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS21021: 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
AS29314	VECTRA S.A.	Residential	IPv4 IPv6	2,727

Transit

Downstream networks

All 21

Networks for which AS21021 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS39219	ENEA Operator Sp.z o.o.	Unclassified	IPv4	59
AS44643	Multimedia Polska Sp. z o.o.	Unclassified	IPv4	59
AS210085	Rzeszowska Agencja Rozwoju Regionalnego S.A.	Unclassified	IPv4	59
AS8834	Gmina Miasto Rzeszow	Unclassified	IPv4	55
AS214258	INTROGRAF-LUBLIN SPOLKA AKCYJNA	Unclassified	IPv4	45
AS34076	Zaklad Elektronicznej Techniki Obliczeniowej w Olsztynie spolka z ograniczona odpowiedzialnoscia	Unclassified	IPv4	44
AS60279	Gmina Miasta Elk	Unclassified	IPv4	44
AS211046	Airbus Poland S.A.	Unclassified	IPv4	44
AS51589	Faith-Net S.C. Robert Wrobel, Stanislaw Sutkowski	Unclassified	IPv4	31
AS48311	I-BS.PL Sp. z.o.o.	Unclassified	IPv4	28

All 21 downstreams →

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS21021 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS29314	VECTRA S.A.	Residential	IPv4 IPv6	3,330
AS39219	ENEA Operator Sp.z o.o.	Unclassified	IPv4	59
AS44643	Multimedia Polska Sp. z o.o.	Unclassified	IPv4	59
AS210085	Rzeszowska Agencja Rozwoju Regionalnego S.A.	Unclassified	IPv4	59
AS8834	Gmina Miasto Rzeszow	Unclassified	IPv4	55
AS214258	INTROGRAF-LUBLIN SPOLKA AKCYJNA	Unclassified	IPv4	45
AS34076	Zaklad Elektronicznej Techniki Obliczeniowej w Olsztynie spolka z ograniczona odpowiedzialnoscia	Unclassified	IPv4	44
AS60279	Gmina Miasta Elk	Unclassified	IPv4	44
AS211046	Airbus Poland S.A.	Unclassified	IPv4	44
AS51589	Faith-Net S.C. Robert Wrobel, Stanislaw Sutkowski	Unclassified	IPv4	31

All 22 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.