asn.dev

Observed topology

AS43372 TELNAP

Residential RIPE Cable/DSL/ISP

Upstreams 19 carry this network
Downstreams 16 this network carries
Adjacent (IPv4) 31
Adjacent (IPv6) 13
Upstream graph Who carries AS43372, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS43372 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 19

Networks observed carrying traffic for AS43372: 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
AS29535Orange Polska Spolka AkcyjnaUnclassifiedIPv4614
AS1299Arelion Sweden ABTransitIPv4 IPv6180
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4124
AS9002RETN LimitedUnclassifiedIPv4 IPv676
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv662
AS3257GTT Communications Inc.TransitIPv431
AS20804Exatel S.A.UnclassifiedIPv4 IPv621
AS59832PANSTWOWY INSTYTUT BADAWCZYUnclassifiedIPv420
AS24482SG.GSHostingIPv4 IPv619
AS34019Hivane AssociationUnclassifiedIPv4 IPv619

All 19 upstreams →

Transit

Downstream networks

All 16

Networks for which AS43372 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS51064Glowny Inspektorat Transportu DrogowegoUnclassifiedIPv4120
AS209388TOWARZYSTWO UBEZPIECZEN WZAJEMNYCH "TUW"UnclassifiedIPv496
AS200648Centrum Personalizacji Dokumentow Ministerstwa Spraw Wewnetrznych i AdministracjiUnclassifiedIPv464
AS203422Biblioteka NarodowaUnclassifiedIPv464
AS211375MINISTERSTWO INFRASTRUKTURYUnclassifiedIPv464
AS49200Sperasoft Poland Sp. z o.o.UnclassifiedIPv461
AS205481Clare Wifi Networks LimitedUnclassifiedIPv459
AS24597Panstwowy Instytut BadawczyUnclassifiedIPv452
AS28950AGENCJA RESTRUKTURYZACJI I MODERNIZACJI ROLNICTWAUnclassifiedIPv452
AS48534Centrum Informatyki StatystycznejUnclassifiedIPv450

All 16 downstreams →

Adjacency

Adjacent networks

All 35

Every AS seen directly next to AS43372 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS29535Orange Polska Spolka AkcyjnaUnclassifiedIPv41,116
AS1299Arelion Sweden ABTransitIPv4 IPv6248
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4231
AS51064Glowny Inspektorat Transportu DrogowegoUnclassifiedIPv4120
AS9002RETN LimitedUnclassifiedIPv4 IPv6114
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6107
AS209388TOWARZYSTWO UBEZPIECZEN WZAJEMNYCH "TUW"UnclassifiedIPv496
AS200648Centrum Personalizacji Dokumentow Ministerstwa Spraw Wewnetrznych i AdministracjiUnclassifiedIPv464
AS203422Biblioteka NarodowaUnclassifiedIPv464
AS211375MINISTERSTWO INFRASTRUKTURYUnclassifiedIPv464

All 35 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.