Observed topology

AS39156 FTELECOM-AS First Telecom Ltd

Unclassified ARIN

Upstreams 7 carry this network

Downstreams 5 this network carries

Adjacent (IPv4) 13

Adjacent (IPv6) 0

Upstream graph Who carries AS39156, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS39156 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS39156: 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
AS20764	CJSC RASCOM	Unclassified	IPv4	86
AS28917	Fiord Networks, UAB	Unclassified	IPv4	72
AS1299	Arelion Sweden AB	Transit	IPv4	18
AS8241	Nets and Services JCS	Unclassified	IPv4	6
AS24482	SG.GS	Hosting	IPv4	2
AS37721	Virtual Technologies & Solutions	Residential	IPv4	2
AS50384	iHome LLC	Unclassified	IPv4	2

Transit

Downstream networks

inferred

Networks for which AS39156 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS35928	BECKMAN COULTER, INC.	Unclassified	IPv4	126
AS199287	First Telecom Ltd	Unclassified	IPv4	64
AS31183	LLC "European Media Group"	Unclassified	IPv4	58
AS48781	AVK-computer ltd	Residential	IPv4	52
AS35129	"LLC Tetra-Telematik"	Unclassified	IPv4	8

Adjacency

Adjacent networks

All 13

Every AS seen directly next to AS39156 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS20764	CJSC RASCOM	Unclassified	IPv4	201
AS35928	BECKMAN COULTER, INC.	Unclassified	IPv4	126
AS28917	Fiord Networks, UAB	Unclassified	IPv4	103
AS57174	Nets and Services JCS	Unclassified	IPv4	102
AS48781	AVK-computer ltd	Residential	IPv4	65
AS199287	First Telecom Ltd	Unclassified	IPv4	64
AS31183	LLC "European Media Group"	Unclassified	IPv4	58
AS1299	Arelion Sweden AB	Transit	IPv4	53
AS50384	iHome LLC	Unclassified	IPv4	24
AS8241	Nets and Services JCS	Unclassified	IPv4	14

All 13 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.