asn.dev

Observed topology

AS51219 K2_INT

Unclassified RIPE Enterprise

Upstreams 12 carry this network
Downstreams 1 this network carries
Adjacent (IPv4) 13
Adjacent (IPv6) 5
Upstream graph Who carries AS51219, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS51219 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 12

Networks observed carrying traffic for AS51219: 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
AS31500Global Network Management IncUnclassifiedIPv4842
AS199599Telecom-Birzha, LLCUnclassifiedIPv4 IPv6532
AS9002RETN LimitedUnclassifiedIPv4 IPv6521
AS57304JSC "RetnNet"UnclassifiedIPv4 IPv6507
AS6939Hurricane Electric LLCTransitIPv4296
AS201706SERVICEPIPE LLCUnclassifiedIPv459
AS208972GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETIUnclassifiedIPv4 IPv649
AS24482SG.GSHostingIPv4 IPv648
AS37721Virtual Technologies & SolutionsResidentialIPv448
AS49673Truenetwork LLCUnclassifiedIPv447

All 12 upstreams →

Transit

Downstream networks

inferred

Networks for which AS51219 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS33903Closed Joint Stock Company CROC incorporatedUnclassifiedIPv43

Adjacency

Adjacent networks

All 13

Every AS seen directly next to AS51219 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS31500Global Network Management IncUnclassifiedIPv4848
AS199599Telecom-Birzha, LLCUnclassifiedIPv4 IPv6540
AS9002RETN LimitedUnclassifiedIPv4 IPv6522
AS57304JSC "RetnNet"UnclassifiedIPv4 IPv6509
AS6939Hurricane Electric LLCTransitIPv4296
AS201706SERVICEPIPE LLCUnclassifiedIPv459
AS208972GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETIUnclassifiedIPv4 IPv650
AS37721Virtual Technologies & SolutionsResidentialIPv449
AS24482SG.GSHostingIPv4 IPv648
AS49673Truenetwork LLCUnclassifiedIPv447

All 13 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-16 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.23M 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.