asn.dev

Observed topology

AS21030 CDNNOW-AS

Hosting RIPE Content

Upstreams 19 carry this network
Downstreams 3 this network carries
Adjacent (IPv4) 22
Adjacent (IPv6) 3
Upstream graph Who carries AS21030, and who carries them, drawn as a map up to the transit-free core. 6 exchanges Where AS21030 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 19

Networks observed carrying traffic for AS21030: 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
AS62255BiMajLink d.o.o.UnclassifiedIPv4 IPv6178
AS202984Chernyshov Aleksandr AleksandrovichUnclassifiedIPv4165
AS39572DataWeb Global Group B.V.HostingIPv4124
AS35598INETCOM CARRIER LLCUnclassifiedIPv4 IPv6115
AS3216PJSC "Vimpelcom"MobileIPv480
AS20485Joint Stock Company TransTeleComUnclassifiedIPv449
AS6939Hurricane Electric LLCTransitIPv447
AS20764CJSC RASCOMUnclassifiedIPv613
AS59627Docker LTDUnclassifiedIPv410
AS48858JSC "ER-Telecom Holding"UnclassifiedIPv49

All 19 upstreams →

Transit

Downstream networks

inferred

Networks for which AS21030 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS12567GAIJIN NETWORK LTDUnclassifiedIPv461
AS208981Data Center LLCUnclassifiedIPv411
AS48989Cluster LLCUnclassifiedIPv43

Adjacency

Adjacent networks

All 23

Every AS seen directly next to AS21030 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS62255BiMajLink d.o.o.UnclassifiedIPv4 IPv6216
AS202984Chernyshov Aleksandr AleksandrovichUnclassifiedIPv4165
AS39572DataWeb Global Group B.V.HostingIPv4137
AS35598INETCOM CARRIER LLCUnclassifiedIPv4 IPv6115
AS3216PJSC "Vimpelcom"MobileIPv480
AS12567GAIJIN NETWORK LTDUnclassifiedIPv461
AS20485Joint Stock Company TransTeleComUnclassifiedIPv449
AS6939Hurricane Electric LLCTransitIPv447
AS48858JSC "ER-Telecom Holding"UnclassifiedIPv419
AS206446CLOUD LEASE LtdHostingIPv416

All 23 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-29 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.36M 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.