asn.dev

Observed topology

AS21013 ITANDTEL-AS eww ag

Unclassified ARIN

Upstreams 29 carry this network
Downstreams 34 this network carries
Adjacent (IPv4) 65
Adjacent (IPv6) 33
Upstream graph Who carries AS21013, and who carries them, drawn as a map up to the transit-free core. 9 exchanges Where AS21013 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 29

Networks observed carrying traffic for AS21013: 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
AS6939Hurricane Electric LLCTransitIPv4 IPv6123
AS33891Core-Backbone GmbHHostingIPv4 IPv6105
AS174Cogent Communications, LLCTransitIPv4 IPv664
AS1299Arelion Sweden ABTransitIPv4 IPv658
AS3356Level 3 Parent, LLCTransitIPv4 IPv658
AS6461Zayo BandwidthTransitIPv4 IPv647
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv636
AS3257GTT Communications Inc.TransitIPv433
AS12605LIWEST Kabelmedien GmbHResidentialIPv432
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv422

All 29 upstreams →

Transit

Downstream networks

All 34

Networks for which AS21013 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS28919Stadtwerke Kufstein GmbHResidentialIPv4 IPv6744
AS204410Feistritzwerke-STEWEAG GmbHUnclassifiedIPv4 IPv6527
AS35579AktiengesellschaftResidentialIPv4 IPv6266
AS49864ECS Rockenschaub GmbHUnclassifiedIPv4 IPv6236
AS24792Stadtwerke Kitzbuehel e.U.UnclassifiedIPv4233
AS61108eww agUnclassifiedIPv4198
AS34318ASAK Glasfaser GmbHUnclassifiedIPv4185
AS44329NTS Netzwerk Telekom Service AGUnclassifiedIPv4 IPv6160
AS205314TGW Holding GmbHUnclassifiedIPv4 IPv6134
AS41384x-tention Informationstechnologie GmbHUnclassifiedIPv4124

All 34 downstreams →

Adjacency

Adjacent networks

All 66

Every AS seen directly next to AS21013 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS28919Stadtwerke Kufstein GmbHResidentialIPv4 IPv6942
AS6939Hurricane Electric LLCTransitIPv4 IPv6758
AS174Cogent Communications, LLCTransitIPv4 IPv6585
AS6461Zayo BandwidthTransitIPv4 IPv6574
AS204410Feistritzwerke-STEWEAG GmbHUnclassifiedIPv4 IPv6527
AS1299Arelion Sweden ABTransitIPv4 IPv6493
AS3356Level 3 Parent, LLCTransitIPv4 IPv6418
AS33891Core-Backbone GmbHHostingIPv4 IPv6376
AS35579AktiengesellschaftResidentialIPv4 IPv6317
AS24792Stadtwerke Kitzbuehel e.U.UnclassifiedIPv4291

All 66 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.