asn.dev

Observed topology

AS12615 GCN-AS GCN AD - Sofia, Bulgaria

Unclassified RIPE

Upstreams 24 carry this network
Downstreams 26 this network carries
Adjacent (IPv4) 52
Adjacent (IPv6) 17
Upstream graph Who carries AS12615, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS12615 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 24

Networks observed carrying traffic for AS12615: 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
AS1299Arelion Sweden ABTransitIPv4 IPv6572
AS57463NetIX Communications JSCUnclassifiedIPv4 IPv6476
AS44901Belcloud LTDHostingIPv4340
AS6939Hurricane Electric LLCTransitIPv4282
AS174Cogent Communications, LLCTransitIPv4 IPv6264
AS3356Level 3 Parent, LLCTransitIPv4 IPv6168
AS9002RETN LimitedUnclassifiedIPv4 IPv6148
AS1273IDDQD-ASBusinessIPv4134
AS3303Swisscom (Schweiz) AGResidentialIPv448
AS208972GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETIUnclassifiedIPv4 IPv648

All 24 upstreams →

Transit

Downstream networks

All 26

Networks for which AS12615 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS39401Link+ LtdUnclassifiedIPv4742
AS49040K and G UNISAT -TV LLCUnclassifiedIPv4560
AS38932Rimex Ltd.UnclassifiedIPv4432
AS29622ICON LtdUnclassifiedIPv4418
AS205352KABELNET LTDUnclassifiedIPv4413
AS42086RO&NI EOODUnclassifiedIPv4 IPv6276
AS49849MG 2002 LTD.UnclassifiedIPv4232
AS35773iConnect Ltd.ResidentialIPv4 IPv6220
AS44313Set Service Ltd.ResidentialIPv4208
AS199191Dimitar Vasilev-9 EOODUnclassifiedIPv4177

All 26 downstreams →

Adjacency

Adjacent networks

All 53

Every AS seen directly next to AS12615 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv61,286
AS39401Link+ LtdUnclassifiedIPv41,118
AS57463NetIX Communications JSCUnclassifiedIPv4 IPv61,028
AS44901Belcloud LTDHostingIPv4981
AS174Cogent Communications, LLCTransitIPv4 IPv6943
AS9002RETN LimitedUnclassifiedIPv4 IPv6696
AS6939Hurricane Electric LLCTransitIPv4669
AS1273IDDQD-ASBusinessIPv4648
AS49040K and G UNISAT -TV LLCUnclassifiedIPv4560
AS3356Level 3 Parent, LLCTransitIPv4 IPv6439

All 53 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M 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.