asn.dev

Observed topology

AS12739 NETLINE_AS

Unclassified RIPE

Upstreams 8 carry this network
Downstreams 2 this network carries
Adjacent (IPv4) 10
Adjacent (IPv6) 6
Upstream graph Who carries AS12739, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS12739 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS12739: 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
AS20764CJSC RASCOMUnclassifiedIPv4 IPv6206
AS1299Arelion Sweden ABTransitIPv4 IPv663
AS28917Fiord Networks, UABUnclassifiedIPv4 IPv632
AS29076Citytelecom LLCHostingIPv4 IPv623
AS9049JSC "ER-Telecom Holding"UnclassifiedIPv4 IPv67
AS24482SG.GSHostingIPv4 IPv66
AS49673Truenetwork LLCUnclassifiedIPv45
AS50384iHome LLCUnclassifiedIPv45

Transit

Downstream networks

inferred

Networks for which AS12739 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS60642OJSC "Trade Center Elektronika na Presny"UnclassifiedIPv434
AS57589Equipment Support Ltd.UnclassifiedIPv46

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS12739 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS20764CJSC RASCOMUnclassifiedIPv4 IPv6236
AS1299Arelion Sweden ABTransitIPv4 IPv663
AS28917Fiord Networks, UABUnclassifiedIPv4 IPv639
AS60642OJSC "Trade Center Elektronika na Presny"UnclassifiedIPv434
AS29076Citytelecom LLCHostingIPv4 IPv625
AS9049JSC "ER-Telecom Holding"UnclassifiedIPv4 IPv68
AS24482SG.GSHostingIPv4 IPv66
AS57589Equipment Support Ltd.UnclassifiedIPv46
AS49673Truenetwork LLCUnclassifiedIPv45
AS50384iHome LLCUnclassifiedIPv45

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-17 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.18M 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.