Observed topology

AS39543 TENNET-AS

Unclassified RIPE NSP

Upstreams 7 carry this network

Downstreams 5 this network carries

Adjacent (IPv4) 12

Adjacent (IPv6) 1

Upstream graph Who carries AS39543, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS39543 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS39543: 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
AS6204	INTERKVM HOST SRL	Unclassified	IPv4	1,222
AS41494	Asociatia Interlan	Unclassified	IPv4 IPv6	290
AS6939	Hurricane Electric LLC	Transit	IPv4	190
AS8708	DIGI ROMANIA S.A.	Mobile	IPv4	45
AS20764	CJSC RASCOM	Unclassified	IPv4	30
AS24482	SG.GS	Hosting	IPv4	30
AS24745	Orange Romania S.A.	Unclassified	IPv4	30

Transit

Downstream networks

inferred

Networks for which AS39543 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS41984	Confort L&CC SRL	Unclassified	IPv4	300
AS41537	SC C Solution SRL	Unclassified	IPv4	185
AS30890	Tennet Telecom SRL	Unclassified	IPv4	61
AS60604	Primaria Municipiului Calarasi	Unclassified	IPv4	60
AS214265	Yako Telecom SRL	Unclassified	IPv4	34

Adjacency

Adjacent networks

All 12

Every AS seen directly next to AS39543 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS6204	INTERKVM HOST SRL	Unclassified	IPv4	1,687
AS41494	Asociatia Interlan	Unclassified	IPv4 IPv6	362
AS41984	Confort L&CC SRL	Unclassified	IPv4	300
AS6939	Hurricane Electric LLC	Transit	IPv4	264
AS41537	SC C Solution SRL	Unclassified	IPv4	185
AS30890	Tennet Telecom SRL	Unclassified	IPv4	61
AS60604	Primaria Municipiului Calarasi	Unclassified	IPv4	60
AS8708	DIGI ROMANIA S.A.	Mobile	IPv4	45
AS20764	CJSC RASCOM	Unclassified	IPv4	41
AS24482	SG.GS	Hosting	IPv4	41

All 12 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-30 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.49M 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.