Observed topology

AS21127 ZSTTKAS Novosibirsk, Russia

Unclassified RIPE

Upstreams 1 carry this network

Downstreams 8 this network carries

Adjacent (IPv4) 8

Adjacent (IPv6) 2

Upstream graph Who carries AS21127, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS21127 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS21127: 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.

AS	Network	Type	Families	Paths seen
AS20485	Joint Stock Company TransTeleCom	Unclassified	IPv4 IPv6	3,207

Transit

Downstream networks

inferred

Networks for which AS21127 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS31364	Joint Stock Company TransTeleCom	Unclassified	IPv4	2,820
AS42323	Limited Liability Company "TTK-Svyaz"	Unclassified	IPv4	180
AS42408	Transvyaz-N LLC	Unclassified	IPv4	120
AS30871	Municipalnoe kazennoe uchrezhdenie goroda Novosibirska "Hozyaistvennoe upravlenie"	Unclassified	IPv4	60
AS51256	JSC "Special Economic Zone of Technology-Innovative Type "Tomsk"	Unclassified	IPv4	60
AS58008	Service Desk Ltd.	Unclassified	IPv4	60
AS198021	LLC "Business Alliance"	Unclassified	IPv4	60
AS47530	Novokuznetsk Telecom Ltd	Unclassified	IPv6	34

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS21127 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS20485	Joint Stock Company TransTeleCom	Unclassified	IPv4 IPv6	6,613
AS31364	Joint Stock Company TransTeleCom	Unclassified	IPv4	2,832
AS42323	Limited Liability Company "TTK-Svyaz"	Unclassified	IPv4	180
AS42408	Transvyaz-N LLC	Unclassified	IPv4	120
AS30871	Municipalnoe kazennoe uchrezhdenie goroda Novosibirska "Hozyaistvennoe upravlenie"	Unclassified	IPv4	60
AS51256	JSC "Special Economic Zone of Technology-Innovative Type "Tomsk"	Unclassified	IPv4	60
AS58008	Service Desk Ltd.	Unclassified	IPv4	60
AS198021	LLC "Business Alliance"	Unclassified	IPv4	60
AS47530	Novokuznetsk Telecom Ltd	Unclassified	IPv6	34

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-31 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.50M 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.