asn.dev

Observed topology

AS39543 TENNET-AS Tennet Telecom SRL

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.

ASNetworkTypeFamiliesPaths seen
AS6204ZET Communications S.R.L.UnclassifiedIPv41,069
AS41494Asociatia InterlanUnclassifiedIPv4 IPv6376
AS6939Hurricane Electric LLCTransitIPv4245
AS8708DIGI ROMANIA S.A.MobileIPv481
AS20764CJSC RASCOMUnclassifiedIPv430
AS24482SG.GSHostingIPv430
AS24745Orange Romania S.A.UnclassifiedIPv430

Transit

Downstream networks

inferred

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

ASNetworkTypeFamiliesPaths seen
AS41984Confort L&CC SRLUnclassifiedIPv4305
AS41537SC C Solution SRLUnclassifiedIPv4161
AS30890Tennet Telecom SRLUnclassifiedIPv461
AS60604Primaria Municipiului CalarasiUnclassifiedIPv461
AS214265Yako Telecom SRLUnclassifiedIPv412

Adjacency

Adjacent networks

All 12

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

ASNetworkTypeFamiliesPaths seen
AS6204ZET Communications S.R.L.UnclassifiedIPv41,445
AS41494Asociatia InterlanUnclassifiedIPv4 IPv6477
AS6939Hurricane Electric LLCTransitIPv4339
AS41984Confort L&CC SRLUnclassifiedIPv4305
AS41537SC C Solution SRLUnclassifiedIPv4161
AS8708DIGI ROMANIA S.A.MobileIPv481
AS30890Tennet Telecom SRLUnclassifiedIPv461
AS60604Primaria Municipiului CalarasiUnclassifiedIPv461
AS20764CJSC RASCOMUnclassifiedIPv441
AS24482SG.GSHostingIPv441

All 12 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.