asn.dev

Observed topology

AS41421 AS-SNT StarNet Telecom Sp. z o.o.

Unclassified RIPE Cable/DSL/ISP

Upstreams 9 carry this network
Downstreams 9 this network carries
Adjacent (IPv4) 16
Adjacent (IPv6) 8
Upstream graph Who carries AS41421, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS41421 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS41421: 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.

ASNetworkTypeFamiliesPaths seen
AS12741Netia SAResidentialIPv4662
AS3356Level 3 Parent, LLCTransitIPv4 IPv6382
AS9002RETN LimitedUnclassifiedIPv4 IPv6310
AS6939Hurricane Electric LLCTransitIPv4 IPv6187
AS12912T-Mobile Polska S.A.UnclassifiedIPv4 IPv697
AS5617Orange Polska Spolka AkcyjnaMobileIPv4 IPv669
AS29632Netassist International EOODUnclassifiedIPv64
AS24482SG.GSHostingIPv4 IPv63
AS201054Stowarzyszenie e-PoludnieUnclassifiedIPv62

Transit

Downstream networks

inferred

Networks for which AS41421 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS59948StarNet Telecom Sp. z o.o.UnclassifiedIPv4103
AS8635Hewlett Packard France S.A.S.UnclassifiedIPv461
AS15443Media SAUnclassifiedIPv461
AS199369Freenet Telecom Sp. z o.o.UnclassifiedIPv461
AS208100R.Power S.A.UnclassifiedIPv439
AS394265Box.comUnclassifiedIPv424
AS29275MIRATECH CONSULTING LLCUnclassifiedIPv422
AS47290HAITONG BANK SAUnclassifiedIPv420
AS48023StarNet Telecom Sp. z o.o.UnclassifiedIPv49

Adjacency

Adjacent networks

All 18

Every AS seen directly next to AS41421 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS12741Netia SAResidentialIPv4763
AS3356Level 3 Parent, LLCTransitIPv4 IPv6473
AS9002RETN LimitedUnclassifiedIPv4 IPv6412
AS6939Hurricane Electric LLCTransitIPv4 IPv6215
AS12912T-Mobile Polska S.A.UnclassifiedIPv4 IPv6156
AS59948StarNet Telecom Sp. z o.o.UnclassifiedIPv4103
AS5617Orange Polska Spolka AkcyjnaMobileIPv4 IPv685
AS8635Hewlett Packard France S.A.S.UnclassifiedIPv461
AS15443Media SAUnclassifiedIPv461
AS199369Freenet Telecom Sp. z o.o.UnclassifiedIPv461

All 18 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-11 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.47M 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.