Observed topology

AS42437 T2-ROSTOV-AS T2 Mobile LLC

Unclassified RIPE

Upstreams 9 carry this network

Downstreams 1 this network carries

Adjacent (IPv4) 10

Adjacent (IPv6) 0

Upstream graph Who carries AS42437, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS42437 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS42437: 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
AS31133	PJSC MegaFon	Mobile	IPv4	650
AS12389	PJSC Rostelecom	Residential	IPv4	468
AS6939	Hurricane Electric LLC	Transit	IPv4	260
AS24482	SG.GS	Hosting	IPv4	26
AS37721	Virtual Technologies & Solutions	Residential	IPv4	26
AS49673	Truenetwork LLC	Unclassified	IPv4	26
AS50673	Serverius Holding B.V.	Unclassified	IPv4	26
AS56655	Gigahost AS	Unclassified	IPv4	26
AS208972	GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETI	Unclassified	IPv4	26

Transit

Downstream networks

inferred

Networks for which AS42437 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS39374	T2 Mobile LLC	Unclassified	IPv4	232

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS42437 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS31133	PJSC MegaFon	Mobile	IPv4	742
AS12389	PJSC Rostelecom	Residential	IPv4	560
AS6939	Hurricane Electric LLC	Transit	IPv4	292
AS39374	T2 Mobile LLC	Unclassified	IPv4	248
AS37721	Virtual Technologies & Solutions	Residential	IPv4	32
AS50673	Serverius Holding B.V.	Unclassified	IPv4	32
AS56655	Gigahost AS	Unclassified	IPv4	32
AS208972	GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETI	Unclassified	IPv4	32
AS24482	SG.GS	Hosting	IPv4	30
AS49673	Truenetwork LLC	Unclassified	IPv4	30

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M 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.